├── .gitignore ├── BadUnboxing ├── pom.xml └── src │ └── main │ ├── java │ └── com │ │ └── lauriewired │ │ ├── BadUnboxing.java │ │ ├── analyzer │ │ ├── ApkAnalysisDetails.java │ │ ├── CodeReplacerUtils.java │ │ ├── DynamicDexLoaderDetection.java │ │ ├── IdentifierRenamer.java │ │ ├── JadxUtils.java │ │ ├── ReflectionRemover.java │ │ └── UnpackerGenerator.java │ │ └── ui │ │ ├── AnalysisWindow.java │ │ ├── CustomProgressBar.java │ │ ├── DirectoryTreeModel.java │ │ ├── NoIconTreeCell.java │ │ ├── SyntaxUtility.java │ │ └── TextAreaOutputStream.java │ └── resources │ ├── icon.png │ └── logback.xml ├── LICENSE ├── README.md └── media ├── Bad_Unboxing_Demo.mp4 ├── Main_Window.png ├── bad_unboxing_logo.png └── confirm_execution.png /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled class files 2 | *.class 3 | 4 | # Log files 5 | *.log 6 | 7 | # Maven specific files 8 | target/ 9 | pom.xml.tag 10 | pom.xml.releaseBackup 11 | pom.xml.versionsBackup 12 | pom.xml.next 13 | release.properties 14 | 15 | # VS Code specific files 16 | .vscode/ -------------------------------------------------------------------------------- /BadUnboxing/pom.xml: -------------------------------------------------------------------------------- 1 | 4 | 4.0.0 5 | 6 | com.lauriewired 7 | BadUnboxing 8 | 1.0-SNAPSHOT 9 | jar 10 | 11 | BadUnboxing 12 | http://maven.apache.org 13 | 14 | 15 | 16 | google 17 | https://maven.google.com 18 | 19 | 20 | 21 | 22 | 23 | io.github.skylot 24 | jadx-core 25 | 1.5.0 26 | 27 | 28 | 29 | io.github.skylot 30 | jadx-dex-input 31 | 1.5.0 32 | 33 | 34 | 35 | xpp3 36 | xpp3 37 | 1.1.4c 38 | 39 | 40 | 41 | org.slf4j 42 | slf4j-api 43 | 2.0.13 44 | 45 | 46 | 47 | ch.qos.logback 48 | logback-classic 49 | 1.5.6 50 | 51 | 52 | 53 | com.fifesoft 54 | rsyntaxtextarea 55 | 3.4.0 56 | 57 | 58 | 59 | com.github.weisj 60 | darklaf-core 61 | 3.0.2 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | org.apache.maven.plugins 70 | maven-compiler-plugin 71 | 3.8.1 72 | 73 | 11 74 | 11 75 | UTF-8 76 | 77 | 78 | 79 | 80 | 81 | org.apache.maven.plugins 82 | maven-jar-plugin 83 | 3.2.0 84 | 85 | 86 | 87 | true 88 | com.lauriewired.BadUnboxing 89 | 90 | 91 | 92 | 93 | 94 | maven-assembly-plugin 95 | 3.3.0 96 | 97 | 98 | 99 | com.lauriewired.BadUnboxing 100 | 101 | 102 | 103 | jar-with-dependencies 104 | 105 | 106 | 107 | 108 | make-assembly 109 | package 110 | 111 | single 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/BadUnboxing.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired; 2 | 3 | import java.awt.datatransfer.DataFlavor; 4 | import java.awt.dnd.DnDConstants; 5 | import java.awt.dnd.DropTarget; 6 | import java.awt.dnd.DropTargetAdapter; 7 | import java.awt.dnd.DropTargetDropEvent; 8 | import java.awt.Dimension; 9 | import java.awt.Font; 10 | import java.awt.GridBagConstraints; 11 | import java.awt.GridBagLayout; 12 | import java.awt.Insets; 13 | import java.io.File; 14 | import java.net.URL; 15 | import java.util.List; 16 | 17 | import javax.swing.ImageIcon; 18 | import javax.swing.JButton; 19 | import javax.swing.JFileChooser; 20 | import javax.swing.JFrame; 21 | import javax.swing.JLabel; 22 | import javax.swing.JPanel; 23 | import javax.swing.JTextField; 24 | import javax.swing.SwingUtilities; 25 | import org.slf4j.Logger; 26 | import org.slf4j.LoggerFactory; 27 | 28 | import com.github.weisj.darklaf.LafManager; 29 | import com.github.weisj.darklaf.theme.DarculaTheme; 30 | 31 | import com.lauriewired.ui.AnalysisWindow; 32 | 33 | public class BadUnboxing { 34 | private static final Logger logger = LoggerFactory.getLogger(BadUnboxing.class); 35 | 36 | public static void main(String[] args) { 37 | // Set the Darklaf Look and Feel 38 | try { 39 | LafManager.install(new DarculaTheme()); 40 | } catch (Exception e) { 41 | e.printStackTrace(); 42 | } 43 | 44 | SwingUtilities.invokeLater(BadUnboxing::createAndShowGUI); 45 | } 46 | 47 | private static void createAndShowGUI() { 48 | JFrame frame = new JFrame("BadUnboxing"); 49 | frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 50 | frame.setSize(600, 400); // Increased size for better spacing 51 | 52 | // Set the window icon 53 | try { 54 | URL imageUrl = BadUnboxing.class.getClassLoader().getResource("icon.png"); 55 | if (imageUrl != null) { 56 | ImageIcon imageIcon = new ImageIcon(imageUrl); 57 | frame.setIconImage(imageIcon.getImage()); 58 | } else { 59 | logger.error("Icon resource not found"); 60 | } 61 | } catch (Exception e) { 62 | logger.error("Failed to load window icon", e); 63 | } 64 | 65 | JPanel panel = new JPanel(); 66 | frame.add(panel); 67 | placeComponents(panel, frame); 68 | 69 | frame.setVisible(true); 70 | } 71 | 72 | private static void placeComponents(JPanel panel, JFrame frame) { 73 | panel.setLayout(new GridBagLayout()); 74 | GridBagConstraints constraints = new GridBagConstraints(); 75 | constraints.fill = GridBagConstraints.HORIZONTAL; 76 | constraints.insets = new Insets(15, 15, 15, 15); // Larger margins around components 77 | 78 | /* 79 | // Label "APK File:" 80 | JLabel label = new JLabel("APK Unpacker"); 81 | label.setFont(new Font("Verdana", Font.BOLD, 25)); // Set font style and size 82 | constraints.gridx = 0; // Column 0 83 | constraints.gridy = 0; // Row 0 84 | constraints.gridwidth = 4; // Span across all columns 85 | constraints.anchor = GridBagConstraints.CENTER; // Center alignment 86 | constraints.insets = new Insets(20, 15, 20, 15); // Add padding 87 | panel.add(label, constraints); 88 | */ 89 | 90 | // Text Field for file path 91 | JTextField filePathText = new JTextField(); 92 | filePathText.setFont(new Font("Verdana", Font.PLAIN, 16)); // Set font style and size 93 | filePathText.setEditable(false); 94 | filePathText.setPreferredSize(new Dimension(275, 30)); // Set preferred size for wider text field 95 | //filePathText.setBorder(BorderFactory.createEmptyBorder()); // Remove the white border 96 | constraints.gridx = 0; // Column 0 97 | constraints.gridy = 1; // Row 1 98 | constraints.gridwidth = 3; // Takes three columns 99 | constraints.anchor = GridBagConstraints.CENTER; // Center alignment 100 | constraints.insets = new Insets(10, 15, 10, 5); // Add padding 101 | panel.add(filePathText, constraints); 102 | 103 | // "Select File" button 104 | JButton fileButton = new JButton("Select File"); 105 | constraints.gridx = 3; // Column 3 106 | constraints.gridy = 1; // Row 1 107 | constraints.gridwidth = 1; // Takes one column 108 | constraints.anchor = GridBagConstraints.CENTER; // Center alignment 109 | constraints.insets = new Insets(5, 5, 5, 15); // Add padding 110 | panel.add(fileButton, constraints); 111 | 112 | // Status label 113 | JLabel statusLabel = new JLabel(""); 114 | statusLabel.setFont(new Font("Verdana", Font.ITALIC, 14)); // Set font style and size 115 | constraints.gridx = 0; // Column 0 116 | constraints.gridy = 3; // Row 3 117 | constraints.gridwidth = 4; // Span across all columns 118 | constraints.anchor = GridBagConstraints.CENTER; // Center alignment 119 | constraints.insets = new Insets(10, 15, 10, 15); // Add padding 120 | panel.add(statusLabel, constraints); 121 | 122 | // "Unpack" button 123 | JButton unpackButton = new JButton("Generate Unpacker"); 124 | constraints.gridx = 0; // Column 0 125 | constraints.gridy = 2; // Row 2 126 | constraints.gridwidth = 4; // Span across all columns 127 | constraints.anchor = GridBagConstraints.CENTER; // Center alignment 128 | constraints.insets = new Insets(10, 15, 10, 15); // Add padding 129 | panel.add(unpackButton, constraints); 130 | 131 | // File and button listeners 132 | setupDragAndDrop(filePathText); 133 | setupFileButtonListener(fileButton, filePathText, panel); 134 | setupUnpackButtonListener(unpackButton, filePathText, statusLabel, frame); 135 | } 136 | 137 | private static void setupDragAndDrop(JTextField filePathText) { 138 | new DropTarget(filePathText, new DropTargetAdapter() { 139 | @Override 140 | public void drop(DropTargetDropEvent evt) { 141 | try { 142 | evt.acceptDrop(DnDConstants.ACTION_COPY); 143 | List droppedFiles = (List) evt.getTransferable().getTransferData(DataFlavor.javaFileListFlavor); 144 | if (!droppedFiles.isEmpty()) { 145 | File file = droppedFiles.get(0); 146 | filePathText.setText(file.getAbsolutePath()); 147 | } 148 | } catch (Exception ex) { 149 | logger.error("Error during file drop", ex); 150 | } 151 | } 152 | }); 153 | } 154 | 155 | private static void setupFileButtonListener(JButton fileButton, JTextField filePathText, JPanel panel) { 156 | fileButton.addActionListener(e -> { 157 | JFileChooser fileChooser = new JFileChooser(); 158 | fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 159 | int option = fileChooser.showOpenDialog(panel); 160 | if (option == JFileChooser.APPROVE_OPTION) { 161 | File selectedFile = fileChooser.getSelectedFile(); 162 | filePathText.setText(selectedFile.getAbsolutePath()); 163 | } 164 | }); 165 | } 166 | 167 | private static void setupUnpackButtonListener(JButton unpackButton, JTextField filePathText, JLabel statusLabel, JFrame frame) { 168 | unpackButton.addActionListener(e -> { 169 | String apkFilePath = filePathText.getText(); 170 | if (!apkFilePath.isEmpty()) { 171 | AnalysisWindow.show(frame, apkFilePath); // Open Analysis Window 172 | } else { 173 | statusLabel.setText("Please enter a valid APK file path."); 174 | } 175 | }); 176 | } 177 | } 178 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/ApkAnalysisDetails.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.io.File; 4 | 5 | public class ApkAnalysisDetails { 6 | private File baseDir; 7 | private String fullQualifiedClassName; 8 | private int recognizedImports; 9 | 10 | public ApkAnalysisDetails(File baseDir, String fullQualifiedClassName, int recognizedImports) { 11 | this.baseDir = baseDir; 12 | this.fullQualifiedClassName = fullQualifiedClassName; 13 | this.recognizedImports = recognizedImports; 14 | } 15 | 16 | public File getBaseDir() { 17 | return baseDir; 18 | } 19 | 20 | public String getFullyQualifiedClassName() { 21 | return fullQualifiedClassName; 22 | } 23 | 24 | public int getRecognizedImports() { 25 | return recognizedImports; 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/CodeReplacerUtils.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.util.HashSet; 4 | import java.util.Set; 5 | import java.util.regex.Matcher; 6 | import java.util.regex.Pattern; 7 | 8 | import org.slf4j.Logger; 9 | import org.slf4j.LoggerFactory; 10 | 11 | public class CodeReplacerUtils { 12 | private static final Logger logger = LoggerFactory.getLogger(CodeReplacerUtils.class); 13 | 14 | // Dummy class defintions 15 | private static final String DUMMY_CONTEXT_CLASS = 16 | "class Context {\n" + 17 | " // Dummy Context class implementation\n" + 18 | "}\n"; 19 | 20 | private static final String DUMMY_APPLICATION_CLASS = 21 | "class Application {\n" + 22 | " // Dummy Application class implementation\n" + 23 | "}\n"; 24 | 25 | //TODO: update variable patterns to look like this Pattern variablePattern = Pattern.compile("([a-zA-Z0-9_]+)\\s*=\\s*"); 26 | 27 | public static String insertImport(String newImport, String classCode) { 28 | // Prefix the new import with 'import ' and suffix with ';' 29 | String formattedImport = "import " + newImport + ";"; 30 | 31 | // Check if the formatted import already exists in classCode 32 | if (classCode.contains(formattedImport)) { 33 | // Import already exists, do nothing 34 | return classCode; 35 | } 36 | 37 | // Find the first occurrence of an import statement 38 | int importIndex = classCode.indexOf("import "); 39 | 40 | if (importIndex != -1) { 41 | // Insert the new import one line before the first import statement 42 | int insertIndex = classCode.lastIndexOf("\n", importIndex) + 1; 43 | String modifiedClassCode = classCode.substring(0, insertIndex) + formattedImport + "\n" + classCode.substring(insertIndex); 44 | logger.info("Inserted import " + newImport); 45 | return modifiedClassCode; 46 | } else { 47 | // No import statements found, add the new import at the beginning 48 | String modifiedClassCode = formattedImport + "\n" + classCode; 49 | logger.info("Inserted import " + newImport); 50 | return modifiedClassCode; 51 | } 52 | } 53 | 54 | public static StringBuilder processClassImports(StringBuilder javaCode, String newClassCode) { 55 | // Extract imports from existing code 56 | Set existingImports = new HashSet<>(); 57 | Matcher importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(javaCode); 58 | while (importMatcher.find()) { 59 | existingImports.add(importMatcher.group()); 60 | } 61 | 62 | StringBuilder imports = new StringBuilder(); 63 | importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(newClassCode); 64 | while (importMatcher.find()) { 65 | String importStatement = importMatcher.group(); 66 | if (!existingImports.contains(importStatement)) { 67 | imports.append(importStatement).append("\n"); 68 | existingImports.add(importStatement); 69 | } 70 | } 71 | 72 | return imports; 73 | } 74 | 75 | /* 76 | * Modifying methods from dalvik.system.DexClassLoader 77 | */ 78 | public static String processDexClassLoaderMethods(String classCode) { 79 | // Pattern to find calls to new DexClassLoader with arguments 80 | Pattern dexClassLoaderPattern = Pattern.compile(".*new\\s+DexClassLoader\\(([^,]+),.*"); 81 | 82 | Matcher matcher = dexClassLoaderPattern.matcher(classCode); 83 | StringBuffer modifiedCode = new StringBuffer(); 84 | 85 | // Replace all occurrences with System.out.println(firstArgument) 86 | while (matcher.find()) { 87 | String firstArgument = matcher.group(1).trim(); 88 | 89 | // Replace the call to DexClassLoader with System.out.println(firstArgument) 90 | String replacement = "System.out.println(" + firstArgument + "); // BadUnboxing: Replacing DexClassLoader call with directory print"; 91 | 92 | matcher.appendReplacement(modifiedCode, replacement); 93 | 94 | logger.info("Replacing call to DexClassLoader with printing target directory to console"); 95 | } 96 | matcher.appendTail(modifiedCode); 97 | 98 | return modifiedCode.toString(); 99 | } 100 | 101 | public static void modifyAssetManager() { 102 | // Change asset manager to instead input a file from a folder with the dumped assets 103 | } 104 | 105 | /* 106 | * Modifying methods from android.util.ArrayMap 107 | */ 108 | public static String processArrayMapMethods(String classCode, StringBuilder imports) { 109 | classCode = insertImport("java.util.HashMap", classCode); 110 | 111 | // Pattern to find lines containing ArrayMap 112 | Pattern arrayMapPattern = Pattern.compile("^(?!import).*\\bArrayMap\\b.*", Pattern.MULTILINE); 113 | 114 | Matcher matcher = arrayMapPattern.matcher(classCode); 115 | StringBuffer modifiedCode = new StringBuffer(); 116 | 117 | // Replace all occurrences of ArrayMap with HashMap and add a comment at the end of the line 118 | while (matcher.find()) { 119 | String line = matcher.group(); 120 | String modifiedLine = line.replaceAll("\\bArrayMap\\b", "HashMap") + " // BadUnboxing: Replacing ArrayMap with HashMap"; 121 | 122 | logger.info("Replacing call to ArrayMap references with HashMap"); 123 | 124 | matcher.appendReplacement(modifiedCode, modifiedLine); 125 | } 126 | matcher.appendTail(modifiedCode); 127 | 128 | return modifiedCode.toString(); 129 | } 130 | 131 | /* 132 | * Modifying methods from android.content.pm.ApplicationInfo 133 | */ 134 | public static String processApplicationInfoMethods(String classCode, String apkPath) { 135 | classCode = modifySourceDir(classCode, apkPath); 136 | //classCode = modifyNativeLibraryDir(classCode); //TODO 137 | 138 | return classCode; 139 | } 140 | 141 | public static String modifySourceDir(String classCode, String apkPath) { 142 | // Pattern to find lines containing Build.VERSION.SDK_INT 143 | Pattern sdkIntPattern = Pattern.compile(".*\\.sourceDir.*", Pattern.MULTILINE); 144 | 145 | Matcher matcher = sdkIntPattern.matcher(classCode); 146 | StringBuffer modifiedCode = new StringBuffer(); 147 | 148 | // Replace all occurrences with the hardcoded value 30 and add a comment at the end of the line 149 | while (matcher.find()) { 150 | String line = matcher.group(); 151 | String replacement = "\"" + apkPath.replace("\\", "\\\\\\\\\\\\\\\\") + "\""; 152 | String modifiedLine = line.replaceAll("(sourceDir)|(([a-zA-Z]+\\.)sourceDir|[a-zA-Z]+\\(\\)\\.sourceDir)", replacement); 153 | // Add the comment at the end of the line 154 | modifiedLine += " // BadUnboxing: Replacing sourceDir with path to APK"; 155 | 156 | matcher.appendReplacement(modifiedCode, modifiedLine); 157 | logger.info("Replacing call to sourceDir with path to APK"); 158 | } 159 | matcher.appendTail(modifiedCode); 160 | 161 | return modifiedCode.toString(); 162 | } 163 | 164 | /* 165 | * Modifying methods from android.os.Build 166 | */ 167 | public static String processBuildMethods(String classCode) { 168 | classCode = modifyBuildSdkInt(classCode); 169 | 170 | return classCode; 171 | } 172 | 173 | public static String modifyBuildSdkInt(String classCode) { 174 | // Pattern to find lines containing Build.VERSION.SDK_INT 175 | Pattern sdkIntPattern = Pattern.compile(".*SDK_INT.*", Pattern.MULTILINE); 176 | 177 | Matcher matcher = sdkIntPattern.matcher(classCode); 178 | StringBuffer modifiedCode = new StringBuffer(); 179 | 180 | // Replace all occurrences with the hardcoded value 30 and add a comment at the end of the line 181 | while (matcher.find()) { 182 | String line = matcher.group(); 183 | // Replace SDK_INT with 30 184 | String modifiedLine = line.replaceAll("(SDK_INT)|(([a-zA-Z]+\\.)+SDK_INT)", "30"); 185 | // Add the comment at the end of the line 186 | modifiedLine += " // BadUnboxing: Hardcode build SDK_INT"; 187 | 188 | matcher.appendReplacement(modifiedCode, modifiedLine); 189 | logger.info("Replacing call to SDK_INT with constant value 30 in line"); 190 | } 191 | matcher.appendTail(modifiedCode); 192 | 193 | return modifiedCode.toString(); 194 | } 195 | 196 | /* 197 | * Modifying methods from android.app.Application 198 | */ 199 | public static void processApplicationMethods(StringBuilder javaCode) { 200 | insertDummyApplicationClass(javaCode); 201 | } 202 | 203 | public static void insertDummyApplicationClass(StringBuilder javaCode) { 204 | // Find the end of the import section 205 | Matcher importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(javaCode); 206 | int lastImportIndex = 0; 207 | while (importMatcher.find()) { 208 | lastImportIndex = importMatcher.end(); 209 | } 210 | 211 | // Find the index to insert the dummy class after the last import 212 | int insertIndex = javaCode.indexOf("\n", lastImportIndex) + 1; 213 | javaCode.insert(insertIndex, "\n" + DUMMY_APPLICATION_CLASS + "\n"); 214 | 215 | logger.info("Inserted dummy Application class"); 216 | } 217 | 218 | /* 219 | * Modifying methods from android.content.Context 220 | */ 221 | 222 | public static void processContextMethods(StringBuilder javaCode, String className, String packageName) { 223 | insertDummyContextClass(javaCode); 224 | modifyGetDirMethod(javaCode, className); 225 | modifyGetPackageName(javaCode, packageName); 226 | modifyGetFileStreamPath(javaCode, className); 227 | } 228 | 229 | public static void insertDummyContextClass(StringBuilder javaCode) { 230 | // Find the end of the import section 231 | Matcher importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(javaCode); 232 | int lastImportIndex = 0; 233 | while (importMatcher.find()) { 234 | lastImportIndex = importMatcher.end(); 235 | } 236 | 237 | // Find the index to insert the dummy class after the last import 238 | int insertIndex = javaCode.indexOf("\n", lastImportIndex) + 1; 239 | javaCode.insert(insertIndex, "\n" + DUMMY_CONTEXT_CLASS + "\n"); 240 | 241 | logger.info("Inserted dummy Context class"); 242 | } 243 | 244 | // TODO we might be able to combine this method and the getDir method. Lots of repeated code except regex 245 | private static void modifyGetFileStreamPath(StringBuilder javaCode, String className) { 246 | // Pattern to find getFileStreamPath method calls in both variable assignment and return statement contexts 247 | Pattern getFileStreamPathPattern = Pattern.compile("(.*)getFileStreamPath\\((.*)\\)"); 248 | 249 | Matcher matcher = getFileStreamPathPattern.matcher(javaCode); 250 | StringBuffer modifiedCode = new StringBuffer(); 251 | 252 | while (matcher.find()) { 253 | String prefix = matcher.group(1); // This captures 'var = ' or 'return ', if present 254 | String fileName = matcher.group(2).trim(); // The file name argument to getFileStreamPath 255 | 256 | // Construct the replacement code using standard Java File operations 257 | String replacement = "new File(System.getProperty(\"user.dir\") + \"/" + className + "_dynamic\", " + fileName + ")"; 258 | if (prefix != null && prefix.contains("=")) { 259 | // Case for variable assignment 260 | String varName = prefix.split("\\s*=\\s*")[0].trim(); 261 | 262 | replacement = varName + " = " + replacement; 263 | 264 | // Make sure we don't include type if it was included 265 | if (varName.split("\\s").length > 1) { 266 | varName = varName.split("\\s")[1].trim(); 267 | } 268 | 269 | replacement += ";\nif (!" + varName + ".exists()) { " + varName + ".mkdirs(); }"; 270 | } else { 271 | // Case for return statement 272 | String newFileReplacement = replacement; 273 | String varName = "var_tmp_" + IdentifierRenamer.generateRandomPostfix(); 274 | replacement = "File " + varName + " = " + newFileReplacement + ";\n"; 275 | replacement += "if (!" + varName + ".exists()) { " + varName + ".mkdirs(); }"; 276 | replacement += "\nreturn " + varName + ";"; 277 | } 278 | 279 | replacement += " // BadUnboxing: Redirect to dynamic directory"; 280 | 281 | // Replace the getFileStreamPath call in the original line 282 | matcher.appendReplacement(modifiedCode, replacement); 283 | logger.info("Replacing call to getFileStreamPath with dynamic directory path"); 284 | } 285 | matcher.appendTail(modifiedCode); 286 | 287 | // Replace the original code with the modified code 288 | javaCode.setLength(0); 289 | javaCode.append(modifiedCode); 290 | } 291 | 292 | private static void modifyGetPackageName(StringBuilder javaCode, String packageName) { 293 | // Pattern to find lines containing getPackageName() calls 294 | Pattern getPackageNamePattern = Pattern.compile(".*getPackageName\\(\\)(\\s*;)"); 295 | Matcher lineMatcher = getPackageNamePattern.matcher(javaCode); 296 | StringBuffer modifiedCode = new StringBuffer(); 297 | 298 | while (lineMatcher.find()) { 299 | String line = lineMatcher.group(); 300 | // Replace getPackageName() or any prefix with it using the new regex 301 | String modifiedLine = line.replaceAll("getPackageName\\(\\)|[\\w+\\.]+getPackageName\\(\\)", "\"" + packageName + "\""); 302 | modifiedLine += " // BadUnboxing: Hardcode package name"; 303 | lineMatcher.appendReplacement(modifiedCode, modifiedLine); 304 | logger.info("Replacing call to getPackageName with string literal '{}'", packageName); 305 | } 306 | lineMatcher.appendTail(modifiedCode); 307 | 308 | // Replace the original code with the modified code 309 | javaCode.setLength(0); 310 | javaCode.append(modifiedCode); 311 | } 312 | 313 | private static void modifyGetDirMethod(StringBuilder javaCode, String className) { 314 | // Pattern to find getDir method calls in both variable assignment and return statement contexts 315 | Pattern getDirPattern = Pattern.compile("(.*)getDir\\(([^,]+),\\s*\\d+\\s*\\)"); 316 | 317 | Matcher matcher = getDirPattern.matcher(javaCode); 318 | StringBuffer modifiedCode = new StringBuffer(); 319 | 320 | while (matcher.find()) { 321 | String prefix = matcher.group(1); // This captures 'var = ' or 'return ', if present 322 | String dirName = matcher.group(2).trim(); // The directory name argument to getDir 323 | 324 | // Construct the replacement code using standard Java File operations 325 | String replacement = "new File(System.getProperty(\"user.dir\") + \"/" + className + "_dynamic\", " + dirName + ")"; 326 | if (prefix != null && prefix.contains("=")) { 327 | // Case for variable assignment 328 | String varName = prefix.split("\\s*=\\s*")[0].trim(); 329 | replacement = varName + " = " + replacement; 330 | 331 | // Make sure we don't include type if it was included 332 | if (varName.split("\\s").length > 1) { 333 | varName = varName.split("\\s")[1].trim(); 334 | } 335 | 336 | replacement += ";\nif (!" + varName + ".exists()) { " + varName + ".mkdirs(); }"; 337 | } else { 338 | // Case for return statement 339 | String newFileReplacement = replacement; 340 | String varName = "var_tmp_" + IdentifierRenamer.generateRandomPostfix(); 341 | replacement = "File " + varName + " = " + newFileReplacement + ";\n"; 342 | replacement += "if (!" + varName + ".exists()) { " + varName + ".mkdirs(); }"; 343 | replacement += "\nreturn " + varName + ";"; 344 | } 345 | 346 | replacement += " // BadUnboxing: Change to current directory"; 347 | 348 | // Replace the getDir call in the original line 349 | matcher.appendReplacement(modifiedCode, replacement); 350 | logger.info("Replacing call to getDir with path to dynamic directory based on context"); 351 | } 352 | matcher.appendTail(modifiedCode); 353 | 354 | // Replace the original code with the modified code 355 | javaCode.setLength(0); 356 | javaCode.append(modifiedCode); 357 | } 358 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/DynamicDexLoaderDetection.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.util.ArrayList; 4 | import java.util.Arrays; 5 | import java.util.HashSet; 6 | import java.util.List; 7 | import java.util.Set; 8 | 9 | import org.slf4j.Logger; 10 | import org.slf4j.LoggerFactory; 11 | 12 | import jadx.api.JadxDecompiler; 13 | import jadx.api.JavaClass; 14 | 15 | public class DynamicDexLoaderDetection { 16 | private static final Logger logger = LoggerFactory.getLogger(DynamicDexLoaderDetection.class); 17 | 18 | private static final Set dynamicDexLoadingKeywords = new HashSet<>(Arrays.asList( 19 | "DexClassLoader", "PathClassLoader", "InMemoryDexClassLoader", "BaseDexClassLoader", "loadDex", "OpenMemory" 20 | )); 21 | 22 | public static List getJavaDexLoadingDetails(JadxDecompiler jadx) { 23 | List details = new ArrayList<>(); 24 | for (JavaClass cls : jadx.getClasses()) { 25 | String classCode = cls.getCode(); 26 | for (String keyword : dynamicDexLoadingKeywords) { 27 | if (classCode.contains(keyword)) { 28 | String detail = String.format("Found keyword '%s' in class '%s'", keyword, cls.getFullName()); 29 | logger.info(detail); 30 | details.add(detail); 31 | } 32 | } 33 | } 34 | return details; 35 | } 36 | 37 | public static boolean hasNativeDexLoading() { 38 | // TODO 39 | 40 | // Save the jadx output directory and find the native libs (files ending in .so) 41 | 42 | return false; 43 | } 44 | } 45 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/IdentifierRenamer.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.util.ArrayList; 4 | import java.util.List; 5 | import java.util.Random; 6 | import java.util.Set; 7 | import java.util.regex.Matcher; 8 | import java.util.regex.Pattern; 9 | 10 | import org.slf4j.Logger; 11 | import org.slf4j.LoggerFactory; 12 | 13 | import jadx.api.JadxDecompiler; 14 | import jadx.api.JavaClass; 15 | import jadx.api.JavaField; 16 | import jadx.api.JavaMethod; 17 | import jadx.core.dex.nodes.FieldNode; 18 | 19 | public class IdentifierRenamer { 20 | private static final Logger logger = LoggerFactory.getLogger(IdentifierRenamer.class); 21 | private static final int POSTFIX_LENGTH = 8; 22 | private static final String CHARACTERS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; 23 | private static final Random RANDOM = new Random(); 24 | 25 | public static void renameMethodsAndFields(JavaClass javaClass, JadxDecompiler jadx, Set existingNames) { 26 | // Via JADX API 27 | renameMethods(javaClass, jadx, existingNames); 28 | renameFields(javaClass, jadx, existingNames); 29 | } 30 | 31 | public static StringBuilder renameArgsAndVars(JavaClass javaClass, JadxDecompiler jadx, Set existingNames) { 32 | javaClass.reload(); // Make sure we got the renamed methods and fields 33 | 34 | // Via regular expressions 35 | // Can't find a great way to rename these via the JADX API 36 | StringBuilder javaCode = new StringBuilder(); 37 | javaCode.append(javaClass.getCode()); 38 | 39 | renameMethodArguments(javaCode, existingNames); 40 | renameLocalVariables(javaCode, existingNames); 41 | 42 | return javaCode; 43 | } 44 | 45 | private static void renameMethodArguments(StringBuilder javaCode, Set existingNames) { 46 | // Pattern to match methods with their arguments 47 | Pattern methodPattern = Pattern.compile("(public|protected|private|static)+\\s+[\\w\\[\\]<>]+\\s+(\\w+)\\s*\\(([^)]*)\\)[\\w\\s]*\\{"); 48 | 49 | // Find the last match and work backwards 50 | Matcher methodMatcher = methodPattern.matcher(javaCode); 51 | List matchPositions = new ArrayList<>(); 52 | 53 | while (methodMatcher.find()) { 54 | matchPositions.add(methodMatcher.start()); 55 | } 56 | 57 | // Process matches in reverse order 58 | for (int i = matchPositions.size() - 1; i >= 0; i--) { 59 | int matchStart = matchPositions.get(i); 60 | methodMatcher = methodPattern.matcher(javaCode); 61 | methodMatcher.find(matchStart); 62 | 63 | String methodSignature = methodMatcher.group(); 64 | String arguments = methodMatcher.group(3); // Capture group 3 for arguments 65 | String methodBody = extractMethodBody(javaCode, methodMatcher.end()); 66 | String modifiedMethodBody = methodBody; 67 | 68 | if (!arguments.isEmpty()) { 69 | String[] args = arguments.split(","); 70 | for (String arg : args) { 71 | arg = arg.trim(); 72 | String[] parts = arg.split("\\s+"); 73 | String argName = parts[parts.length - 1]; 74 | if (!argName.startsWith("var_") && !argName.startsWith("method_")) { 75 | String uniqueArgName = generateUniqueName(existingNames, argName, "arg_"); 76 | 77 | logger.info("Renaming method argument {} to {}", argName, uniqueArgName); 78 | 79 | // Replace all references to this argument within the method body 80 | modifiedMethodBody = modifiedMethodBody.replaceAll("\\b" + argName + "\\b", uniqueArgName); 81 | 82 | // Update the method signature with the new argument name 83 | methodSignature = methodSignature.replaceAll("\\b" + argName + "\\b", uniqueArgName); 84 | } 85 | } 86 | } 87 | 88 | // Replace the method body in the original code 89 | String fullMethod = methodSignature + modifiedMethodBody; 90 | javaCode.replace(methodMatcher.start(), methodMatcher.end() + methodBody.length(), fullMethod); 91 | } 92 | } 93 | 94 | private static void renameLocalVariables(StringBuilder javaCode, Set existingNames) { 95 | // Pattern to match methods with their bodies 96 | Pattern methodPattern = Pattern.compile("(public|protected|private|static)+\\s+[\\w\\[\\]<>]+\\s+(\\w+)\\s*\\(([^)]*)\\)[\\w\\s]*\\{"); 97 | 98 | // Find the last match and work backwards 99 | Matcher methodMatcher = methodPattern.matcher(javaCode); 100 | List matchPositions = new ArrayList<>(); 101 | 102 | while (methodMatcher.find()) { 103 | matchPositions.add(methodMatcher.start()); 104 | } 105 | 106 | // Process matches in reverse order 107 | for (int i = matchPositions.size() - 1; i >= 0; i--) { 108 | int matchStart = matchPositions.get(i); 109 | methodMatcher = methodPattern.matcher(javaCode); 110 | methodMatcher.find(matchStart); 111 | 112 | String methodSignature = methodMatcher.group(); 113 | String methodBody = extractMethodBody(javaCode, methodMatcher.end()); 114 | String modifiedMethodBody = methodBody; 115 | 116 | // Pattern to match local variable declarations (including array types) 117 | Pattern localVarPattern = Pattern.compile("(\\b\\w+[\\[\\]\\<\\?\\>]*)\\s+(\\b\\w+\\b)\\s*(=|;)"); 118 | Matcher localVarMatcher = localVarPattern.matcher(methodBody); 119 | 120 | while (localVarMatcher.find()) { 121 | String varType = localVarMatcher.group(1); 122 | String varName = localVarMatcher.group(2); 123 | if (!varName.matches("\\d+") && !varName.equals("null") && 124 | !varName.equals("true") && !varName.equals("false") && 125 | !varName.startsWith("var_")) { 126 | 127 | String uniqueVarName = generateUniqueName(existingNames, varName, "var_"); 128 | 129 | // Replace all references to this variable within the method body 130 | if (varName.startsWith("method_")) { 131 | modifiedMethodBody = replaceVariableNamesWithoutMethod(modifiedMethodBody, varName, uniqueVarName); 132 | } else { 133 | modifiedMethodBody = replaceVariableNames(modifiedMethodBody, varName, uniqueVarName); 134 | } 135 | 136 | logger.info("Renaming local variable {} to {}", varName, uniqueVarName); 137 | } 138 | } 139 | 140 | // Replace the method body in the original code 141 | String fullMethod = methodSignature + modifiedMethodBody; 142 | javaCode.replace(methodMatcher.start(), methodMatcher.end() + methodBody.length(), fullMethod); 143 | } 144 | } 145 | 146 | private static String replaceVariableNamesWithoutMethod(String body, String varName, String uniqueVarName) { 147 | StringBuilder result = new StringBuilder(); 148 | // This regex looks for the variable name as a whole word, ensuring it isn't part of a longer string or variable name 149 | Pattern pattern = Pattern.compile("\\b" + Pattern.quote(varName) + "\\b(?![\\(])"); // Negative lookahead to avoid matches followed by '(' 150 | Matcher matcher = pattern.matcher(body); 151 | 152 | int lastIndex = 0; 153 | while (matcher.find()) { 154 | // Append the part of the body before the match, then append the new unique variable name 155 | result.append(body, lastIndex, matcher.start()) 156 | .append(uniqueVarName); 157 | lastIndex = matcher.end(); 158 | } 159 | // Append the rest of the body after the last match 160 | result.append(body.substring(lastIndex)); 161 | return result.toString(); 162 | } 163 | 164 | private static String replaceVariableNames(String body, String varName, String uniqueVarName) { 165 | StringBuilder result = new StringBuilder(); 166 | Pattern pattern = Pattern.compile("\\b" + varName + "\\b"); 167 | Matcher matcher = pattern.matcher(body); 168 | 169 | int lastIndex = 0; 170 | while (matcher.find()) { 171 | // Check the preceding character 172 | if (matcher.start() == 0 || body.charAt(matcher.start() - 1) != '.') { 173 | result.append(body, lastIndex, matcher.start()) 174 | .append(uniqueVarName); 175 | } else { 176 | result.append(body, lastIndex, matcher.end()); 177 | } 178 | lastIndex = matcher.end(); 179 | } 180 | result.append(body.substring(lastIndex)); 181 | return result.toString(); 182 | } 183 | 184 | private static String extractMethodBody(StringBuilder javaCode, int startIndex) { 185 | int openBraces = 1; 186 | int currentIndex = startIndex; 187 | while (openBraces > 0 && currentIndex < javaCode.length()) { 188 | char currentChar = javaCode.charAt(currentIndex); 189 | if (currentChar == '{') { 190 | openBraces++; 191 | } else if (currentChar == '}') { 192 | openBraces--; 193 | } 194 | currentIndex++; 195 | } 196 | return javaCode.substring(startIndex, currentIndex); 197 | } 198 | 199 | private static void renameMethods(JavaClass javaClass, JadxDecompiler jadx, Set existingNames) { 200 | for (JavaMethod method : javaClass.getMethods()) { 201 | if (!method.getName().startsWith("method_") && !method.getName().equals("attachBaseContext") && 202 | !method.getName().equals("onCreate") && !method.getName().equals("")) { 203 | 204 | String uniqueMethodName = generateUniqueName(existingNames, method.getName(), "method_"); 205 | logger.info("Renaming method {} to {}", method.getName(), uniqueMethodName); 206 | method.getMethodNode().rename(uniqueMethodName); 207 | } 208 | } 209 | } 210 | 211 | private static void renameFields(JavaClass javaClass, JadxDecompiler jadx, Set existingNames) { 212 | for (JavaField field : javaClass.getFields()) { 213 | FieldNode fieldNode = field.getFieldNode(); 214 | if (!field.getName().startsWith("method_") && !field.getName().startsWith("field_")) { 215 | String uniqueFieldName = generateUniqueName(existingNames, field.getName(), "field_"); 216 | logger.info("Renaming field {} to {}", field.getName(), uniqueFieldName); 217 | fieldNode.rename(uniqueFieldName); 218 | } 219 | } 220 | } 221 | 222 | private static String generateUniqueName(Set existingNames, String originalName, String prefix) { 223 | String uniqueName; 224 | do { 225 | uniqueName = prefix + originalName + "_" + generateRandomPostfix(); 226 | } while (existingNames.contains(uniqueName)); 227 | existingNames.add(uniqueName); 228 | return uniqueName; 229 | } 230 | 231 | public static String generateRandomPostfix() { 232 | StringBuilder sb = new StringBuilder(POSTFIX_LENGTH); 233 | for (int i = 0; i < POSTFIX_LENGTH; i++) { 234 | sb.append(CHARACTERS.charAt(RANDOM.nextInt(CHARACTERS.length()))); 235 | } 236 | return sb.toString(); 237 | } 238 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/JadxUtils.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.io.File; 4 | import java.io.StringReader; 5 | import java.util.HashSet; 6 | import java.util.Set; 7 | 8 | import org.slf4j.Logger; 9 | import org.slf4j.LoggerFactory; 10 | import org.xmlpull.v1.XmlPullParser; 11 | import org.xmlpull.v1.XmlPullParserFactory; 12 | 13 | import jadx.api.JadxArgs; 14 | import jadx.api.JadxDecompiler; 15 | import jadx.api.JavaClass; 16 | import jadx.api.ResourceFile; 17 | 18 | public class JadxUtils { 19 | private static final Logger logger = LoggerFactory.getLogger(JadxUtils.class); 20 | 21 | public static JadxDecompiler loadJadx(String apkFilePath) { 22 | File apkFile = new File(apkFilePath); 23 | File outputDir = new File(apkFile.getParent(), "output_temp"); 24 | 25 | JadxArgs jadxArgs = new JadxArgs(); 26 | jadxArgs.setInputFile(apkFile); 27 | jadxArgs.setOutDir(outputDir); 28 | jadxArgs.setShowInconsistentCode(true); 29 | jadxArgs.setSkipResources(true); 30 | jadxArgs.setDeobfuscationOn(true); 31 | jadxArgs.setUseSourceNameAsClassAlias(true); 32 | 33 | JadxDecompiler jadx = new JadxDecompiler(jadxArgs); 34 | try { 35 | jadx.load(); 36 | //jadx.save(); 37 | } catch (Exception e) { 38 | logger.error("Error loading APK", e); 39 | } 40 | 41 | return jadx; 42 | } 43 | 44 | public static JavaClass getJavaClassByName(JadxDecompiler jadx, String className) { 45 | for (JavaClass javaClass : jadx.getClasses()) { 46 | if (javaClass.getFullName().equals(className)) { 47 | return javaClass; 48 | } 49 | } 50 | return null; // Class not found 51 | } 52 | 53 | public static JavaClass findApplicationSubclass(JadxDecompiler jadx) { 54 | for (JavaClass javaClass : jadx.getClasses()) { 55 | if (javaClass.getClassNode().getSuperClass().toString().equals("android.app.Application")) { 56 | logger.info("Found Application subclass: {}", javaClass.getFullName()); 57 | return javaClass; 58 | } 59 | } 60 | return null; 61 | } 62 | 63 | public static Set getManifestClasses(String apkFilePath, JadxDecompiler jadx) throws Exception { 64 | Set classNames = new HashSet<>(); 65 | 66 | String manifestContent = ""; 67 | for (ResourceFile resource : jadx.getResources()) { 68 | if (resource.getOriginalName().equals("AndroidManifest.xml")) { 69 | logger.info("Found AndroidManifest.xml"); 70 | manifestContent = resource.loadContent().getText().getCodeStr(); 71 | break; 72 | } 73 | } 74 | 75 | if (!manifestContent.equals("")) { 76 | // Parse the AndroidManifest.xml 77 | XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); 78 | XmlPullParser parser = factory.newPullParser(); 79 | parser.setInput(new StringReader(manifestContent)); // Use StringReader here 80 | 81 | int eventType = parser.getEventType(); 82 | while (eventType != XmlPullParser.END_DOCUMENT) { 83 | if (eventType == XmlPullParser.START_TAG) { 84 | String name = parser.getName(); 85 | if ("activity".equals(name) || "service".equals(name) || "receiver".equals(name) || "provider".equals(name)) { 86 | for (int i = 0; i < parser.getAttributeCount(); i++) { 87 | if ("android:name".equals(parser.getAttributeName(i))) { 88 | String className = parser.getAttributeValue(i); 89 | logger.info("Manifest class found: {}", className); 90 | classNames.add(className.replace(".", "/") + ".class"); 91 | } 92 | } 93 | } 94 | } 95 | eventType = parser.next(); 96 | } 97 | } 98 | 99 | return classNames; 100 | } 101 | 102 | public static Set getDexClasses(String apkFilePath, JadxDecompiler jadx) throws Exception { 103 | Set classNames = new HashSet<>(); 104 | 105 | for (JavaClass cls : jadx.getClasses()) { 106 | logger.info("Dex class found: {}", cls.getFullName()); 107 | classNames.add(cls.getRawName().replace('.', '/') + ".class"); 108 | } 109 | 110 | return classNames; 111 | } 112 | } 113 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/ReflectionRemover.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.util.Arrays; 4 | import java.util.HashSet; 5 | import java.util.Set; 6 | import java.util.Stack; 7 | import java.util.regex.Matcher; 8 | import java.util.regex.Pattern; 9 | 10 | import org.slf4j.Logger; 11 | import org.slf4j.LoggerFactory; 12 | 13 | public class ReflectionRemover { 14 | private static final Logger logger = LoggerFactory.getLogger(ReflectionRemover.class); 15 | 16 | private static Stack reflectiveValues = new Stack<>(); 17 | private static final Set analyzedValues = new HashSet<>(); 18 | 19 | private static final Set reflectiveKeywords = new HashSet<>(Arrays.asList( 20 | "getMethod", 21 | "invoke", 22 | "getDeclaredField", 23 | "WeakReference", 24 | "forName", 25 | "setAccessible", 26 | "getApplicationContext", 27 | "newInstance" 28 | )); 29 | 30 | public static void removeReflection(StringBuilder javaCode) { 31 | 32 | //System.out.println(javaCode); 33 | 34 | //commentOutMethodUsingReflection(javaCode, surroundWithRegex("forName")); 35 | 36 | /* 37 | commentOutLineUsingReflection(javaCode, surroundWithRegex("getDeclaredField")); 38 | 39 | for (String method : reflectiveValues) { 40 | System.out.println(method); 41 | } 42 | 43 | 44 | //commentOutMethodUsingReflection(javaCode, "[\\s\\.\\(]it[\\s\\.\\);]"); 45 | //commentOutLineUsingReflection(javaCode, "[\\s\\.\\(]it[\\s\\.\\);]"); 46 | 47 | //commentOutMethodUsingReflection(javaCode, "Class.forName"); 48 | //commentOutLineUsingReflection(javaCode, "Class.forName"); 49 | 50 | 51 | for (String method : reflectiveValues) { 52 | System.out.println(method); 53 | }*/ 54 | 55 | //commentOutLineUsingReflection(javaCode, surroundWithRegex("NJdYmOqBdAmAiWnWkAzIiKhNbFqSfAkTtXyRwCmMbCfNqClHu")); 56 | //commentOutLineUsingReflection(javaCode, surroundWithRegex("bwyY_354421")); 57 | 58 | 59 | 60 | // Initial comment out of reflection 61 | for (String keyword : reflectiveKeywords) { 62 | commentOutMethodUsingReflection(javaCode, surroundWithRegex(keyword)); 63 | } 64 | for (String keyword : reflectiveKeywords) { 65 | commentOutLineUsingReflection(javaCode, surroundWithRegex(keyword)); 66 | } 67 | 68 | // Add while loop here to keep iterating through reflectiveMethods and reflectiveVariables while they have values 69 | while (!reflectiveValues.isEmpty()) { 70 | String value = reflectiveValues.pop(); 71 | if (!analyzedValues.contains(value)) { 72 | commentOutMethodUsingReflection(javaCode, surroundWithRegex(value)); 73 | commentOutLineUsingReflection(javaCode, surroundWithRegex(value)); 74 | analyzedValues.add(value); 75 | } 76 | } 77 | } 78 | 79 | private static String surroundWithRegex(String value) { 80 | return "[\\[\\]\\s\\.\\(\\)]" + value + "[\\[\\]\\s\\.\\(\\),;]"; 81 | } 82 | 83 | public static void commentOutLineUsingReflection(StringBuilder javaCode, String keywordRegex) { 84 | // Compile the keyword as a regex pattern 85 | Pattern keywordPattern = Pattern.compile(keywordRegex); 86 | 87 | // Split the code into lines 88 | String[] lines = javaCode.toString().split("\n"); 89 | StringBuilder modifiedCode = new StringBuilder(); 90 | 91 | // Pattern to match variable names 92 | Pattern variablePattern = Pattern.compile("([a-zA-Z0-9_]+)\\s*=(\\s*)"); 93 | Pattern methodPattern = Pattern.compile(".*\\s(public|private|protected|static|void)+\\s."); 94 | 95 | // Iterate over each line 96 | for (String line : lines) { 97 | Matcher keywordMatcher = keywordPattern.matcher(line); 98 | Matcher methodMatch = methodPattern.matcher(line); 99 | 100 | if (keywordMatcher.find() && !methodMatch.find() && !line.trim().startsWith("//") && !line.trim().startsWith("import")) { 101 | // Check if the reflective call is on the right of an equal sign 102 | Matcher matcher = variablePattern.matcher(line); 103 | if (matcher.find()) { 104 | if (!matcher.group(2).matches(".*" + keywordRegex + ".*")) { 105 | // Parse out the variable name 106 | String variableName = matcher.group(1); 107 | reflectiveValues.push(variableName); 108 | 109 | logger.info("Found reflective variable: " + variableName); 110 | } 111 | } 112 | // Comment out the line if it contains the keyword and is not already commented out 113 | modifiedCode.append("// ").append(line).append(" // BadUnboxing: Line contains reflection and was commented out\n"); 114 | 115 | // Don't be too noisy so print up to the first 30 chars of the line 116 | String logLine = line.replaceFirst("^\\s+", ""); 117 | logger.info("Commented out reflective line starting with: " + logLine.substring(0, Math.min(logLine.length(), 30))); 118 | 119 | // If the line ends with an opening brace, add "if (true) {" 120 | if (line.trim().endsWith("{")) { 121 | modifiedCode.append("if (true) {\n"); // We just need a dummy placeholder 122 | } 123 | } else { 124 | modifiedCode.append(line).append("\n"); 125 | } 126 | } 127 | 128 | // Replace the original code with the modified code 129 | javaCode.setLength(0); 130 | javaCode.append(modifiedCode); 131 | } 132 | 133 | // omg it works. never change this 134 | public static void commentOutMethodUsingReflection(StringBuilder javaCode, String keywordRegex) { 135 | // Compile the keyword as a regex pattern 136 | Pattern keywordPattern = Pattern.compile(keywordRegex); 137 | 138 | // Split the code into lines 139 | String[] lines = javaCode.toString().split("\n"); 140 | StringBuilder modifiedCode = new StringBuilder(); 141 | 142 | boolean returnContainsReflection = false; 143 | StringBuilder currentMethod = new StringBuilder(); 144 | String currentMethodName = null; 145 | int braceDepth = -1; 146 | 147 | for (String line : lines) { 148 | if (line.trim().matches(".*(public|protected|private|static|\\s)+\\s*\\S+\\s+(method\\S+|main|onCreate)\\(.*\\)\\s+[\\w\\s]*\\{") && !line.trim().startsWith("//")) { 149 | // New method start 150 | currentMethod.setLength(0); 151 | returnContainsReflection = false; 152 | currentMethodName = parseMethodName(line); 153 | currentMethod.append(line).append("\n"); 154 | 155 | braceDepth = 1; 156 | } else if (braceDepth == 0) { 157 | // This means we've finished a method 158 | if (returnContainsReflection) { 159 | commentOutMethod(currentMethod, modifiedCode); 160 | reflectiveValues.push(currentMethodName); 161 | logger.info("Removing reflective method: " + currentMethodName); 162 | } else { 163 | modifiedCode.append(currentMethod).append("\n"); 164 | } 165 | 166 | // Still need to handle the latest line 167 | modifiedCode.append(line); 168 | 169 | braceDepth = -1; // Reset for new method 170 | } else if (braceDepth > 0) { 171 | // Keep up with our braces to keep track of the method length 172 | for (int i = 0; i < line.length(); i++) { 173 | if (line.charAt(i) == '{') { 174 | braceDepth++; 175 | } else if (line.charAt(i) == '}') { 176 | braceDepth--; 177 | } 178 | } 179 | 180 | // Check if the line is a return statement and contains the keyword 181 | Matcher keywordMatcher = keywordPattern.matcher(line); 182 | if (line.trim().startsWith("return") && keywordMatcher.find() && !line.trim().startsWith("//")) { 183 | returnContainsReflection = true; 184 | } 185 | currentMethod.append(line).append("\n"); 186 | } else { 187 | modifiedCode.append(line).append("\n"); 188 | } 189 | } 190 | 191 | // Replace the original code with the modified code 192 | javaCode.setLength(0); 193 | javaCode.append(modifiedCode); 194 | } 195 | 196 | private static String parseMethodName(String line) { 197 | // Simple regex to extract the method name 198 | String methodSignature = line.trim().split("\\(")[0].trim(); 199 | String[] parts = methodSignature.split("\\s+"); 200 | return parts[parts.length - 1]; 201 | } 202 | 203 | private static void commentOutMethod(StringBuilder methodCode, StringBuilder modifiedCode) { 204 | String[] lines = methodCode.toString().split("\n"); 205 | for (String line : lines) { 206 | modifiedCode.append("// BadUnboxing ").append(line).append("\n"); 207 | } 208 | modifiedCode.append("// BadUnboxing: Method contains reflection in return statement and was commented out\n\n"); 209 | } 210 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/analyzer/UnpackerGenerator.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.analyzer; 2 | 3 | import java.io.File; 4 | import java.io.FileWriter; 5 | import java.io.IOException; 6 | import java.util.ArrayList; 7 | import java.util.Arrays; 8 | import java.util.HashSet; 9 | import java.util.Set; 10 | import java.util.regex.Matcher; 11 | import java.util.regex.Pattern; 12 | 13 | import org.slf4j.Logger; 14 | import org.slf4j.LoggerFactory; 15 | 16 | import jadx.api.JadxDecompiler; 17 | import jadx.api.JavaClass; 18 | 19 | public class UnpackerGenerator { 20 | private static final Logger logger = LoggerFactory.getLogger(UnpackerGenerator.class); 21 | private static String apkPath; 22 | private static File baseDir; 23 | private static int importsRecognized; 24 | 25 | private static final Set existingNames = new HashSet<>(); 26 | 27 | 28 | private static final Set standardPackages = new HashSet<>(Arrays.asList( 29 | "android", 30 | "com.android", 31 | "dalvik", 32 | "java", 33 | "javax", 34 | "junit", 35 | "org.apache", 36 | "org.json", 37 | "org.w3c.dom", 38 | "org.xml.sax" 39 | )); 40 | 41 | private static final Set androidOnlyImports = new HashSet<>(Arrays.asList( 42 | "android", 43 | "com.android", 44 | "dalvik", 45 | "com.xiaomi" 46 | )); 47 | 48 | public static ApkAnalysisDetails generateJava(JadxDecompiler jadx, String apkFilePath) { 49 | // Calculating how well BadUnboxing processed this sample 50 | int recognizedImports = 0; 51 | String fullQualifiedClassName = ""; 52 | 53 | // Packing stubs abuse Application subclass for unpacking code 54 | // Make that our starting point since code runs first upon instantiation 55 | JavaClass applicationClass = JadxUtils.findApplicationSubclass(jadx); 56 | 57 | if (applicationClass != null) { 58 | try { 59 | Set referencedClasses = new HashSet<>(); 60 | findReferencedClasses(applicationClass, referencedClasses, jadx); // Need all classes referenced by code 61 | 62 | // Rename the methods and fields first since we'll have to reload the code before renaming args and vars 63 | for (JavaClass currentClass : referencedClasses) { 64 | IdentifierRenamer.renameMethodsAndFields(currentClass, jadx, existingNames); 65 | } 66 | 67 | fullQualifiedClassName = generateUnpackerJava(applicationClass, referencedClasses, apkFilePath, jadx); 68 | } catch (Exception e) { 69 | logger.error("Error generating Unpacker.java", e); 70 | } 71 | } else { 72 | logger.info("No Application subclass found in the APK"); 73 | } 74 | 75 | return (new ApkAnalysisDetails(baseDir, fullQualifiedClassName, recognizedImports)); 76 | } 77 | 78 | private static String generateUnpackerJava(JavaClass applicationClass, Set referencedClasses, String apkFilePath, JadxDecompiler jadx) { 79 | StringBuilder javaCode = new StringBuilder(); 80 | 81 | // Get the APK file 82 | File apkFile = new File(apkFilePath); 83 | apkPath = apkFilePath; 84 | 85 | // Determine the class name based on the APK file name 86 | String apkName = apkFile.getName(); 87 | int dotIndex = apkName.lastIndexOf('.'); 88 | String baseName = (dotIndex == -1) ? apkName : apkName.substring(0, dotIndex); 89 | String className = "Unpacker_" + (baseName.length() > 10 ? baseName.substring(0, 10) : baseName); 90 | baseDir = new File(apkFile.getParent(), className + "_BadUnboxing"); 91 | 92 | // Extract the package name 93 | String fullyQualifiedName = applicationClass.getFullName(); 94 | String packageName = fullyQualifiedName.substring(0, fullyQualifiedName.lastIndexOf('.')); 95 | 96 | // Initialize an ArrayList to store referenced class names 97 | ArrayList referencedClassNames = new ArrayList<>(); 98 | 99 | // Process the main application subclass (entrypoint) 100 | String appClassCode = processApplicationSubclass(applicationClass, className, jadx); 101 | javaCode.append(appClassCode).append("\n"); 102 | 103 | // Process referenced classes 104 | for (JavaClass refClass : referencedClasses) { 105 | if (refClass != applicationClass) { 106 | insertNewClass(javaCode, refClass, jadx); 107 | referencedClassNames.add(refClass.getName()); 108 | } 109 | } 110 | 111 | // Do final cleanups on full code that is now completely added 112 | finalProcessing(javaCode, className, packageName); 113 | 114 | try { 115 | outputClassesToFiles(apkFile, className, javaCode, referencedClassNames); 116 | } catch (IOException e) { 117 | logger.error("Error writing unpacker code to files"); 118 | e.printStackTrace(); 119 | } 120 | 121 | return packageName + "." + className; 122 | } 123 | 124 | private static void outputClassesToFiles(File apkFile, String className, StringBuilder javaCode, ArrayList referencedClassNames) throws IOException { 125 | // Get the directory of the APK file and create a base directory that includes 'src' 126 | File outputDir = new File(baseDir, "src"); 127 | 128 | // Create the base directory if it does not exist, including all necessary parent directories 129 | if (!outputDir.exists()) { 130 | outputDir.mkdirs(); 131 | } 132 | 133 | // Create settings.json in the base directory for the new unpacker project 134 | createSettingsJson(baseDir); 135 | 136 | // Regex pattern to capture content based on "package" declaration 137 | Pattern packagePattern = Pattern.compile("(package\\s+([\\w\\.]+);).*?(?=package\\s+[\\w\\.]+;|$)", Pattern.DOTALL); 138 | Matcher packageMatcher = packagePattern.matcher(javaCode.toString()); 139 | 140 | while (packageMatcher.find()) { 141 | String packageBlock = packageMatcher.group(0); 142 | String fullPackageName = packageMatcher.group(2); 143 | String packagePath = fullPackageName.replace('.', File.separatorChar); // Convert package name to directory path 144 | 145 | // Create the full path for the package inside the 'src' directory 146 | File packageDir = new File(outputDir, packagePath); 147 | if (!packageDir.exists()) { 148 | packageDir.mkdirs(); // Ensure the package directory structure is created 149 | } 150 | 151 | // Extract the class name from the current block of code 152 | Pattern classPattern = Pattern.compile("\\s+class\\s+(?!Application\\b|Context\\b)(\\w+)\\s+\\{"); // Simple class name extraction pattern 153 | Matcher classMatcher = classPattern.matcher(packageBlock); 154 | String fileName = "UnknownClass.java"; // Default file name in case no class name is found 155 | if (classMatcher.find()) { 156 | fileName = classMatcher.group(1) + ".java"; // Use the found class name for the file name 157 | } 158 | 159 | // Write to a new Java file for each package block using the class name 160 | File javaFile = new File(packageDir, fileName); 161 | try (FileWriter writer = new FileWriter(javaFile)) { 162 | writer.write(packageBlock); 163 | logger.info("Generated {} at {}", fileName, javaFile.getAbsolutePath()); 164 | } 165 | } 166 | } 167 | 168 | private static void createSettingsJson(File baseDir) throws IOException { 169 | File settingsFile = new File(baseDir, ".vscode/settings.json"); 170 | 171 | // Ensure the .vscode directory exists 172 | if (!settingsFile.getParentFile().exists()) { 173 | settingsFile.getParentFile().mkdirs(); 174 | } 175 | 176 | // Content of the settings.json file 177 | String settingsContent = "{\n" + 178 | " \"java.project.sourcePaths\": [\"src\"],\n" + 179 | " \"java.project.outputPath\": \"bin\",\n" + 180 | " \"java.project.referencedLibraries\": [\n" + 181 | " \"lib/**/*.jar\"\n" + 182 | " ]\n" + 183 | "}"; 184 | 185 | // Write the settings content to the settings.json file 186 | try (FileWriter writer = new FileWriter(settingsFile)) { 187 | writer.write(settingsContent); 188 | logger.info("Created settings.json at {}", settingsFile.getAbsolutePath()); 189 | } 190 | } 191 | 192 | private static void finalProcessing(StringBuilder javaCode, String className, String packageName) { 193 | commentPackageName(javaCode); 194 | makeMethodsStatic(javaCode); 195 | makeFieldsStatic(javaCode); 196 | removeKeywordThis(javaCode); 197 | CodeReplacerUtils.processContextMethods(javaCode, className, packageName); 198 | CodeReplacerUtils.processApplicationMethods(javaCode); 199 | commentAndroidSpecificImports(javaCode); 200 | ReflectionRemover.removeReflection(javaCode); 201 | } 202 | 203 | private static void commentPackageName(StringBuilder javaCode) { 204 | // Pattern to match the package name declaration 205 | Pattern packagePattern = Pattern.compile("(?m)^package\\s+.*?;"); 206 | Matcher matcher = packagePattern.matcher(javaCode); 207 | 208 | // Buffer to hold the modified code 209 | StringBuffer modifiedCode = new StringBuffer(); 210 | 211 | // Comment out the package name declaration 212 | if (matcher.find()) { 213 | String packageStatement = matcher.group(); 214 | String commentedPackageStatement = "// " + packageStatement; 215 | matcher.appendReplacement(modifiedCode, commentedPackageStatement); 216 | } 217 | matcher.appendTail(modifiedCode); 218 | 219 | // Replace the original code with the modified code 220 | javaCode.setLength(0); 221 | javaCode.append(modifiedCode); 222 | } 223 | 224 | private static void commentAndroidSpecificImports(StringBuilder javaCode) { 225 | // Pattern to match import statements 226 | Pattern importPattern = Pattern.compile("(?m)^import\\s+.*?;"); 227 | Matcher importMatcher = importPattern.matcher(javaCode); 228 | 229 | // Buffer to hold the modified code 230 | StringBuffer modifiedCode = new StringBuffer(); 231 | 232 | while (importMatcher.find()) { 233 | String importStatement = importMatcher.group(); 234 | // Extract the fully qualified class name from the import statement 235 | String className = importStatement.replaceFirst("import\\s+", "").replaceFirst(";", "").trim(); 236 | 237 | // Check if the class name starts with any of the specified prefixes 238 | boolean isAndroidImport = false; 239 | for (String prefix : androidOnlyImports) { 240 | if (className.startsWith(prefix)) { 241 | isAndroidImport = true; 242 | break; 243 | } 244 | } 245 | 246 | // If it is an Android-specific import, comment it out 247 | if (isAndroidImport) { 248 | importStatement = "// " + importStatement; 249 | } 250 | 251 | // Append the modified or unmodified import statement to the buffer 252 | importMatcher.appendReplacement(modifiedCode, importStatement); 253 | } 254 | importMatcher.appendTail(modifiedCode); 255 | 256 | // Replace the original code with the modified code 257 | javaCode.setLength(0); 258 | javaCode.append(modifiedCode); 259 | } 260 | 261 | private static String processApplicationSubclass(JavaClass applicationClass, String className, JadxDecompiler jadx) { 262 | String appClassCode = IdentifierRenamer.renameArgsAndVars(applicationClass, jadx, existingNames).toString(); 263 | appClassCode = appClassCode.replace(applicationClass.getName(), className); 264 | appClassCode = appClassCode.replaceAll("extends Application", ""); 265 | appClassCode = appClassCode.replaceAll("@Override // android.app.Application", ""); 266 | appClassCode = appClassCode.replaceAll("@Override // android.content.ContextWrapper", ""); 267 | appClassCode = appClassCode.replaceAll("super\\.attachBaseContext\\(\\w+\\);", "//super.attachBaseContext(context); // BadUnboxing: Remove superclass reference"); 268 | appClassCode = appClassCode.replaceAll("super\\.onCreate\\(\\);", "//super.onCreate(); // BadUnboxing: Remove superclass reference"); 269 | appClassCode = replaceAttachBaseContextWithMain(appClassCode); 270 | 271 | // Extract imports from the application subclass 272 | StringBuilder imports = new StringBuilder(); 273 | Matcher importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(appClassCode); 274 | while (importMatcher.find()) { 275 | imports.append(importMatcher.group()).append("\n"); 276 | } 277 | 278 | // Fix keywords for imports inside application subclass 279 | appClassCode = processKeyWordsBasedOnImports(imports, appClassCode); 280 | 281 | return appClassCode; 282 | } 283 | 284 | private static String replaceAttachBaseContextWithMain(String appClassCode) { 285 | // Pattern to find the attachBaseContext method signature and extract the parameter name 286 | Pattern pattern = Pattern.compile("(public|protected|private|\\s*)\\s*void\\s*attachBaseContext\\(Context\\s+(\\w+)\\)"); 287 | Matcher matcher = pattern.matcher(appClassCode); 288 | 289 | // Variable to store the Context parameter name 290 | String contextParamName = null; 291 | 292 | // Find and replace the method signature 293 | StringBuffer sb = new StringBuffer(); 294 | while (matcher.find()) { 295 | contextParamName = matcher.group(2); // Capture the parameter name 296 | matcher.appendReplacement(sb, "public static void main(String[] args)"); 297 | } 298 | matcher.appendTail(sb); 299 | appClassCode = sb.toString(); 300 | 301 | // If a parameter name was found, replace all its occurrences in the method body 302 | if (contextParamName != null) { 303 | // Assuming the body of the method is properly isolated if needed for multiple methods 304 | // Replace all occurrences of the Context parameter with "new Context()" (assuming this makes sense in your context) 305 | appClassCode = appClassCode.replaceAll("\\b" + Pattern.quote(contextParamName) + "\\b", "new Context()"); 306 | } 307 | 308 | return appClassCode; 309 | } 310 | 311 | private static void makeFieldsStatic(StringBuilder javaCode) { 312 | // Pattern to match field declarations that start with "field_" 313 | // This pattern looks for optional access modifiers, optional "final" keyword, 314 | // any valid Java type (primitive or object), optional array brackets, and field names starting with "field_" 315 | // It supports fields with or without initial access modifiers. 316 | Pattern fieldPattern = Pattern.compile( 317 | "(?m)^\\s*(public\\s+|protected\\s+|private\\s+)?(static\\s+)?(final\\s+)?([\\w\\[\\]\\<\\>]+\\s+)(field_\\w+\\s*)(=\\s*[^;]+)?;"); 318 | 319 | Matcher matcher = fieldPattern.matcher(javaCode); 320 | StringBuffer modifiedCode = new StringBuffer(); 321 | 322 | while (matcher.find()) { 323 | String accessModifier = matcher.group(1) == null ? "" : matcher.group(1); // Capture access modifiers 324 | String isStatic = matcher.group(2); // Capture the 'static' keyword if it exists 325 | String finalModifier = matcher.group(3) == null ? "" : matcher.group(3); // Capture the 'final' keyword if it exists 326 | String type = matcher.group(4); // Capture the type 327 | String fieldName = matcher.group(5); // Capture the field name 328 | String initializer = matcher.group(6) == null ? "" : matcher.group(6); // Capture the initializer if present 329 | 330 | // Construct the replacement string 331 | String replacement; 332 | if (isStatic == null) { 333 | // If 'static' keyword is missing, add it 334 | replacement = accessModifier + "static " + finalModifier + type + fieldName + initializer + ";"; 335 | } else { 336 | // If 'static' keyword is already there, keep the declaration as it is 337 | replacement = matcher.group(0); 338 | } 339 | 340 | // Append the replacement to the buffer 341 | matcher.appendReplacement(modifiedCode, replacement); 342 | } 343 | matcher.appendTail(modifiedCode); 344 | 345 | // Replace the original code with the modified code 346 | javaCode.setLength(0); 347 | javaCode.append(modifiedCode); 348 | } 349 | 350 | private static void makeMethodsStatic(StringBuilder javaCode) { 351 | // Pattern to match lines starting with whitespace followed by public, protected, or private, followed by a single whitespace, and not followed by "static" 352 | Pattern methodPattern = Pattern.compile("(?m)^\\s*(public|protected|private)\\s+(?!static|class)"); 353 | 354 | Matcher matcher = methodPattern.matcher(javaCode); 355 | 356 | // Buffer to hold the modified code 357 | StringBuffer modifiedCode = new StringBuffer(); 358 | 359 | while (matcher.find()) { 360 | String methodSignature = matcher.group(); 361 | // Modify the line to include "static" after the keyword 362 | String modifiedMethod = methodSignature.replaceFirst("(public|protected|private)", "$1 static"); 363 | matcher.appendReplacement(modifiedCode, modifiedMethod); 364 | } 365 | matcher.appendTail(modifiedCode); 366 | 367 | // Replace the original code with the modified code 368 | javaCode.setLength(0); 369 | javaCode.append(modifiedCode); 370 | } 371 | 372 | private static void removeKeywordThis(StringBuilder javaCode) { 373 | // Pattern to match all occurrences of "this." 374 | Pattern thisPattern = Pattern.compile("\\bthis\\."); 375 | Matcher matcher = thisPattern.matcher(javaCode); 376 | StringBuffer modifiedCode = new StringBuffer(); 377 | 378 | // Replace all occurrences with an empty string 379 | while (matcher.find()) { 380 | matcher.appendReplacement(modifiedCode, ""); 381 | } 382 | matcher.appendTail(modifiedCode); 383 | 384 | // Replace the original code with the modified code 385 | javaCode.setLength(0); 386 | javaCode.append(modifiedCode); 387 | } 388 | 389 | private static void insertNewClass(StringBuilder javaCode, JavaClass newCodeClass, JadxDecompiler jadx) { 390 | String newClassCode = IdentifierRenamer.renameArgsAndVars(newCodeClass, jadx, existingNames).toString(); 391 | 392 | // Remove the package line and store it 393 | /* 394 | String packageLine = ""; 395 | Matcher packageMatcher = Pattern.compile("(?m)^package\\s+.*?;").matcher(newClassCode); 396 | if (packageMatcher.find()) { 397 | packageLine = packageMatcher.group(); 398 | newClassCode = newClassCode.replaceFirst("(?m)^package\\s+.*?;", ""); 399 | }*/ 400 | //TODO keep the package name so we can find it when separating classes 401 | 402 | // Process class imports and update the newClassCode by removing imports 403 | StringBuilder imports = processClassImports(javaCode, newClassCode); 404 | 405 | //TODO removing import moving due to placing files in separate java files 406 | /* 407 | newClassCode = newClassCode.replaceAll("(?m)^import\\s+.*?;", ""); // Remove imports from newClassCode 408 | 409 | // Insert new imports below the package line 410 | int packageLineEnd = javaCode.indexOf(";"); 411 | if (packageLineEnd != -1) { 412 | javaCode.insert(packageLineEnd + 1, "\n\n" + imports.toString()); 413 | } else { 414 | javaCode.insert(0, packageLine + "\n\n" + imports.toString() + "\n"); 415 | }*/ 416 | 417 | newClassCode = processKeyWordsBasedOnImports(imports, newClassCode); 418 | 419 | // Append the new class code without the package line and imports 420 | javaCode.append(newClassCode).append("\n"); 421 | } 422 | 423 | /* 424 | * For performance, only search for methods and replace them if their parent class 425 | * has been imported 426 | */ 427 | private static String processKeyWordsBasedOnImports(StringBuilder imports, String newClassCode) { 428 | // Extract each import statement 429 | Pattern importPattern = Pattern.compile("import\\s+([\\w\\.]+);"); 430 | Matcher matcher = importPattern.matcher(imports); 431 | 432 | // For each import statement, check if it is supported and call the corresponding method 433 | while (matcher.find()) { 434 | String importClass = matcher.group(1); 435 | String prefix = importClass.split("\\.")[0]; 436 | 437 | if (androidOnlyImports.contains(prefix)) { 438 | switch (importClass) { 439 | case "dalvik.system.DexClassLoader": 440 | logger.info("Processing methods from dalvik.system.DexClassLoader import"); 441 | newClassCode = CodeReplacerUtils.processDexClassLoaderMethods(newClassCode); 442 | break; 443 | case "android.os.Build": 444 | logger.info("Processing methods from android.os.Build import"); 445 | newClassCode = CodeReplacerUtils.processBuildMethods(newClassCode); 446 | break; 447 | case "android.content.pm.ApplicationInfo": 448 | logger.info("Processing methods from android.content.pm.ApplicationInfo import"); 449 | newClassCode = CodeReplacerUtils.processApplicationInfoMethods(newClassCode, apkPath); 450 | break; 451 | case "android.util.ArrayMap": 452 | logger.info("Processing methods from import android.util.ArrayMap import"); 453 | newClassCode = CodeReplacerUtils.processArrayMapMethods(newClassCode, imports); 454 | break; 455 | case "android.app.Application": 456 | case "android.content.Context": 457 | // Ignore these because we will process them on all code no matter what 458 | // Adding them as part of the switch anyway because they are technically supported 459 | break; 460 | default: 461 | logger.error("Unknown android import: " + importClass); 462 | } 463 | } 464 | } 465 | 466 | return newClassCode; 467 | } 468 | 469 | private static StringBuilder processClassImports(StringBuilder javaCode, String newClassCode) { 470 | // Extract imports from existing code 471 | Set existingImports = new HashSet<>(); 472 | Matcher importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(javaCode); 473 | while (importMatcher.find()) { 474 | existingImports.add(importMatcher.group()); 475 | } 476 | 477 | StringBuilder imports = new StringBuilder(); 478 | importMatcher = Pattern.compile("(?m)^import\\s+.*?;").matcher(newClassCode); 479 | while (importMatcher.find()) { 480 | String importStatement = importMatcher.group(); 481 | if (!existingImports.contains(importStatement)) { 482 | imports.append(importStatement).append("\n"); 483 | existingImports.add(importStatement); 484 | } 485 | } 486 | 487 | return imports; 488 | } 489 | 490 | private static void findReferencedClasses(JavaClass javaClass, Set referencedClasses, JadxDecompiler jadx) { 491 | // Add the current class to the referenced set if not already present 492 | if (!referencedClasses.add(javaClass)) { 493 | // Class already processed 494 | return; 495 | } 496 | 497 | String packageName = javaClass.getPackage(); 498 | String classCode = javaClass.getCode(); 499 | 500 | // Iterate through all classes in the decompiler 501 | for (JavaClass currentClass : jadx.getClasses()) { 502 | if (packageName.equals(currentClass.getPackage()) && !javaClass.equals(currentClass) && !currentClass.getName().equals("R")) { 503 | if (classCode.contains(currentClass.getName())) { 504 | referencedClasses.add(currentClass); 505 | logger.info("Adding class {} to referenced classes", currentClass.getName()); 506 | findReferencedClasses(currentClass, referencedClasses, jadx); 507 | } 508 | } 509 | } 510 | } 511 | 512 | private static boolean isCustomClass(String typeName) { 513 | for (String standardPackage : standardPackages) { 514 | if (typeName.startsWith(standardPackage)) { 515 | return false; 516 | } 517 | } 518 | return true; 519 | } 520 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/ui/AnalysisWindow.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.ui; 2 | 3 | import java.awt.BorderLayout; 4 | import java.awt.Color; 5 | import java.awt.Dimension; 6 | import java.awt.Font; 7 | import java.awt.Insets; 8 | import java.awt.event.KeyAdapter; 9 | import java.awt.event.KeyEvent; 10 | import java.io.BufferedReader; 11 | import java.io.File; 12 | import java.io.IOException; 13 | import java.io.InputStreamReader; 14 | import java.io.PrintStream; 15 | import java.nio.charset.StandardCharsets; 16 | import java.nio.file.Files; 17 | import java.nio.file.Path; 18 | import java.nio.file.Paths; 19 | import java.util.ArrayList; 20 | import java.util.Arrays; 21 | import java.util.Enumeration; 22 | import java.util.List; 23 | import java.util.Set; 24 | import java.util.stream.Collectors; 25 | 26 | import javax.swing.BoxLayout; 27 | import javax.swing.JButton; 28 | import javax.swing.JFrame; 29 | import javax.swing.JMenu; 30 | import javax.swing.JMenuBar; 31 | import javax.swing.JMenuItem; 32 | import javax.swing.JOptionPane; 33 | import javax.swing.JPanel; 34 | import javax.swing.JScrollPane; 35 | import javax.swing.JSplitPane; 36 | import javax.swing.JTextArea; 37 | import javax.swing.JTree; 38 | import javax.swing.SwingUtilities; 39 | import javax.swing.SwingWorker; 40 | import javax.swing.event.TreeSelectionEvent; 41 | import javax.swing.event.TreeSelectionListener; 42 | import javax.swing.tree.DefaultMutableTreeNode; 43 | import javax.swing.tree.DefaultTreeModel; 44 | import javax.swing.tree.TreePath; 45 | 46 | import com.lauriewired.analyzer.ApkAnalysisDetails; 47 | import com.lauriewired.analyzer.DynamicDexLoaderDetection; 48 | import com.lauriewired.analyzer.JadxUtils; 49 | import com.lauriewired.analyzer.UnpackerGenerator; 50 | import jadx.api.JadxDecompiler; 51 | 52 | import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea; 53 | import org.fife.ui.rsyntaxtextarea.SyntaxConstants; 54 | import org.fife.ui.rtextarea.RTextScrollPane; 55 | import org.slf4j.Logger; 56 | import org.slf4j.LoggerFactory; 57 | 58 | public class AnalysisWindow { 59 | private static final Logger logger = LoggerFactory.getLogger(AnalysisWindow.class); 60 | private static JTree directoryTree; 61 | private static JTree apkDetailsTree; 62 | private static DefaultMutableTreeNode rootNode; 63 | private static String currentFilePath; 64 | private static RSyntaxTextArea rightPanelEditorPane; 65 | private static JScrollPane apkDetailsScrollPane; 66 | private static CustomProgressBar progressBar; 67 | private static String pathToUnpacker; 68 | private static ApkAnalysisDetails apkAnalysisDetails; 69 | 70 | public static void show(JFrame frame, String apkFilePath) { 71 | frame.setExtendedState(JFrame.MAXIMIZED_BOTH); // Maximize the window 72 | frame.setVisible(true); 73 | 74 | // Create the root node for the APK details tree 75 | DefaultMutableTreeNode apkDetailsRoot = new DefaultMutableTreeNode("APK Summary"); 76 | 77 | // Add nodes for different sections 78 | DefaultMutableTreeNode fileNameNode = new DefaultMutableTreeNode("File Name: " + new File(apkFilePath).getName()); 79 | DefaultMutableTreeNode fileSizeNode = new DefaultMutableTreeNode("Size: " + new File(apkFilePath).length() / 1024 + " KB"); 80 | 81 | apkDetailsRoot.add(fileNameNode); 82 | apkDetailsRoot.add(fileSizeNode); 83 | 84 | apkDetailsTree = new JTree(apkDetailsRoot); 85 | apkDetailsTree.setCellRenderer(new NoIconTreeCell()); 86 | apkDetailsTree.setFont(new Font("Verdana", Font.PLAIN, 18)); 87 | 88 | apkDetailsScrollPane = new JScrollPane(apkDetailsTree); 89 | 90 | // Initialize the directory tree with the APK name as the root node 91 | File apkFile = new File(apkFilePath); 92 | rootNode = new DefaultMutableTreeNode(new FileNode(apkFile)); 93 | directoryTree = new JTree(rootNode); 94 | directoryTree.setFont(new Font("Verdana", Font.PLAIN, 18)); 95 | 96 | JScrollPane treeScrollPane = new JScrollPane(directoryTree); 97 | 98 | // Initialize the progress bar 99 | progressBar = new CustomProgressBar(); 100 | progressBar.setIndeterminate(true); 101 | progressBar.setPreferredSize(new Dimension(0, 20)); 102 | progressBar.setString("Processing"); 103 | progressBar.setStringPainted(true); 104 | progressBar.setTextColor(Color.ORANGE); 105 | 106 | // Create a panel for the progress bar 107 | JPanel progressBarPanel = new JPanel(new BorderLayout()); 108 | progressBarPanel.add(progressBar, BorderLayout.CENTER); 109 | progressBarPanel.setPreferredSize(new Dimension(0, 20)); 110 | 111 | // Create a split pane to combine the directory tree and APK details tree 112 | JSplitPane directoryAndDetailsSplitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, treeScrollPane, apkDetailsScrollPane); 113 | directoryAndDetailsSplitPane.setDividerLocation(200); 114 | directoryAndDetailsSplitPane.setResizeWeight(0.5); // Ratio between top and bottom panels 115 | 116 | // Create the main left split pane to include the directory/details split pane and the progress bar 117 | JSplitPane leftSplitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, directoryAndDetailsSplitPane, progressBarPanel); 118 | leftSplitPane.setResizeWeight(0.97); // Ratio between directory/details and progress bar 119 | 120 | // Make the divider invisible 121 | leftSplitPane.setDividerSize(2); 122 | 123 | // Create a RSyntaxTextArea for versatile content display with syntax highlighting 124 | rightPanelEditorPane = new RSyntaxTextArea(); 125 | SyntaxUtility.applyCustomTheme(rightPanelEditorPane); 126 | rightPanelEditorPane.setEditable(true); // Make it editable 127 | rightPanelEditorPane.setFont(new Font("Monospaced", Font.PLAIN, 18)); 128 | rightPanelEditorPane.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_NONE); // Default to no syntax highlighting 129 | 130 | 131 | // Set darker background color 132 | rightPanelEditorPane.setBackground(new Color(30, 30, 30)); 133 | rightPanelEditorPane.setForeground(new Color(230, 230, 230)); 134 | 135 | RTextScrollPane rightPanelScrollPane = new RTextScrollPane(rightPanelEditorPane); 136 | 137 | // Create a panel for the buttons and add them to the top right of the right panel 138 | JPanel buttonPanel = new JPanel(); 139 | buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.Y_AXIS)); 140 | 141 | // Create a font that supports Unicode characters 142 | Font arrowFont = new Font("Arial", Font.PLAIN, 12); 143 | 144 | // Create buttons with Unicode arrow symbols 145 | JButton upButton = new JButton("\u25B2"); // Unicode for black up-pointing triangle 146 | JButton downButton = new JButton("\u25BC"); // Unicode for black down-pointing triangle 147 | 148 | // Set the font for the buttons 149 | upButton.setFont(arrowFont); 150 | downButton.setFont(arrowFont); 151 | 152 | // Set tooltips for the buttons 153 | upButton.setToolTipText("Go to previous BadUnboxing code mod"); 154 | downButton.setToolTipText("Go to next BadUnboxing code mod"); 155 | 156 | // Set preferred sizes to keep the buttons small 157 | Dimension buttonSize = new Dimension(45, 40); 158 | upButton.setPreferredSize(buttonSize); 159 | downButton.setPreferredSize(buttonSize); 160 | 161 | // Add the buttons to the panel 162 | buttonPanel.add(upButton); 163 | buttonPanel.add(downButton); 164 | 165 | // Set the maximum size of the button panel to match the width of the buttons 166 | buttonPanel.setMaximumSize(new Dimension(buttonSize.width, Integer.MAX_VALUE)); 167 | 168 | // Create a panel to hold the button panel and the right panel editor 169 | JPanel rightPanelContainer = new JPanel(new BorderLayout()); 170 | rightPanelContainer.add(buttonPanel, BorderLayout.EAST); 171 | rightPanelContainer.add(rightPanelScrollPane, BorderLayout.CENTER); 172 | 173 | // Create a text area to display the console output 174 | JTextArea textArea = new JTextArea(); 175 | textArea.setEditable(false); 176 | textArea.setFont(new Font("Monospaced", Font.PLAIN, 14)); 177 | 178 | // Set darker background color 179 | textArea.setBackground(new Color(30, 30, 30)); 180 | textArea.setForeground(new Color(230, 230, 230)); 181 | 182 | // Redirect the console output to the text area 183 | PrintStream printStream = new PrintStream(new TextAreaOutputStream(textArea)); 184 | System.setOut(printStream); 185 | System.setErr(printStream); 186 | 187 | // Create a split pane for the right side 188 | JSplitPane rightSplitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, rightPanelContainer, new JScrollPane(textArea)); 189 | rightSplitPane.setDividerLocation(800); 190 | rightSplitPane.setResizeWeight(0.7); // Ratio between top and bottom panels 191 | 192 | // Create a split pane for the left and right sections 193 | JSplitPane mainSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftSplitPane, rightSplitPane); 194 | mainSplitPane.setDividerLocation(400); 195 | mainSplitPane.setResizeWeight(0.3); // Ratio between left and right panels 196 | 197 | frame.getContentPane().removeAll(); // Remove previous components 198 | frame.setLayout(new BorderLayout()); 199 | frame.add(mainSplitPane, BorderLayout.CENTER); 200 | 201 | // Add menu bar 202 | JMenuBar menuBar = new JMenuBar(); 203 | JMenu fileMenu = new JMenu("File"); 204 | 205 | // Create the "Save" menu item 206 | JMenuItem saveMenuItem = new JMenuItem("Save"); 207 | saveMenuItem.addActionListener(e -> saveFile()); 208 | saveMenuItem.setMargin(new Insets(5, 10, 5, 10)); 209 | fileMenu.add(saveMenuItem); 210 | 211 | JMenu runMenu = new JMenu("Run"); 212 | // Create the "Execute" menu item 213 | JMenuItem executeMenuItem = new JMenuItem("Execute"); 214 | executeMenuItem.setMargin(new Insets(5, 10, 5, 10)); 215 | executeMenuItem.addActionListener(e -> { 216 | int response = JOptionPane.showOptionDialog( 217 | frame, 218 | "Are you sure? This should only be executed in a secure malware analysis environment.", 219 | "Confirm Execution", 220 | JOptionPane.YES_NO_OPTION, 221 | JOptionPane.WARNING_MESSAGE, 222 | null, 223 | new String[]{"Continue", "Cancel"}, 224 | "Cancel" 225 | ); 226 | if (response == JOptionPane.YES_OPTION) { 227 | executeCode(rootNode, textArea); 228 | } 229 | }); 230 | runMenu.add(executeMenuItem); 231 | 232 | menuBar.add(fileMenu); 233 | menuBar.add(runMenu); 234 | frame.setJMenuBar(menuBar); 235 | 236 | frame.revalidate(); 237 | frame.repaint(); 238 | 239 | // Call the APK analysis method 240 | analyzeApk(apkFilePath, apkDetailsRoot); 241 | 242 | addDirectoryTreeSelectionListener(); 243 | addRightPanelEditorPaneKeyListener(); 244 | upButton.addActionListener(e -> findPreviousOccurrence("BadUnboxing")); 245 | downButton.addActionListener(e -> findNextOccurrence("BadUnboxing")); 246 | } 247 | 248 | private static void addDirectoryTreeSelectionListener() { 249 | directoryTree.addTreeSelectionListener(new TreeSelectionListener() { 250 | @Override 251 | public void valueChanged(TreeSelectionEvent e) { 252 | DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) directoryTree.getLastSelectedPathComponent(); 253 | if (selectedNode == null) return; 254 | 255 | String filePath = getFilePath(selectedNode); 256 | if (filePath != null) { 257 | currentFilePath = filePath; 258 | try { 259 | Path path = Paths.get(filePath); 260 | if (Files.isRegularFile(path)) { 261 | String content = new String(Files.readAllBytes(path)); 262 | if (filePath.endsWith(".java")) { 263 | rightPanelEditorPane.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVA); 264 | } else if (filePath.endsWith(".json")) { 265 | rightPanelEditorPane.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JSON); 266 | } else { 267 | rightPanelEditorPane.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_NONE); 268 | } 269 | rightPanelEditorPane.setText(content); 270 | rightPanelEditorPane.setCaretPosition(0); 271 | } 272 | } catch (Exception ex) { 273 | ex.printStackTrace(); 274 | rightPanelEditorPane.setText("Error loading file: " + ex.getMessage()); 275 | } 276 | } 277 | } 278 | }); 279 | } 280 | 281 | private static void addRightPanelEditorPaneKeyListener() { 282 | rightPanelEditorPane.addKeyListener(new KeyAdapter() { 283 | @Override 284 | public void keyPressed(KeyEvent e) { 285 | if (e.isControlDown() && e.getKeyCode() == KeyEvent.VK_S) { 286 | saveFile(); 287 | } 288 | } 289 | }); 290 | } 291 | 292 | private static void executeCode(DefaultMutableTreeNode rootNode, JTextArea textArea) { 293 | try { 294 | // Directory containing the generated Java files (set after APK analysis) 295 | File compilationDir = new File(pathToUnpacker).getParentFile(); 296 | File sourceDir = compilationDir.getParentFile(); 297 | 298 | // Get all java files in the directory 299 | File[] javaFiles = compilationDir.listFiles((dir, name) -> name.endsWith(".java")); 300 | if (javaFiles == null || javaFiles.length == 0) { 301 | textArea.append("No Java files found to compile.\n"); 302 | return; 303 | } 304 | 305 | // Convert the file paths to a format suitable for the javac command 306 | List filePaths = Arrays.stream(javaFiles) 307 | .map(File::getAbsolutePath) 308 | .collect(Collectors.toList()); 309 | 310 | // Prepare command list 311 | List command = new ArrayList<>(); 312 | command.add("javac"); 313 | command.addAll(filePaths); 314 | 315 | // Execute the javac command 316 | ProcessBuilder compileProcessBuilder = new ProcessBuilder(command); 317 | compileProcessBuilder.directory(compilationDir); 318 | Process compileProcess = compileProcessBuilder.start(); 319 | 320 | // Redirect compilation output 321 | redirectProcessOutput(compileProcess, textArea); 322 | 323 | compileProcess.waitFor(); 324 | 325 | if (compileProcess.exitValue() != 0) { 326 | textArea.append("Compilation failed.\n"); 327 | return; 328 | } 329 | 330 | // Execute the main unpacker class 331 | String mainClass = apkAnalysisDetails.getFullyQualifiedClassName(); 332 | ProcessBuilder runProcessBuilder = new ProcessBuilder( 333 | "java", "-cp", sourceDir.getAbsolutePath(), mainClass); 334 | runProcessBuilder.directory(sourceDir); 335 | 336 | // Log the command being executed 337 | String commandString = String.join(" ", runProcessBuilder.command()); 338 | logger.info("Running execution command: " + commandString); 339 | textArea.append("Running execution command: " + commandString + "\n"); 340 | progressBar.setString("Executing"); 341 | progressBar.setTextColor(Color.ORANGE); 342 | 343 | Process runProcess = runProcessBuilder.start(); 344 | 345 | // Redirect execution output 346 | redirectProcessOutput(runProcess, textArea); 347 | 348 | runProcess.waitFor(); 349 | 350 | if (runProcess.exitValue() != 0) { 351 | logger.error("Execution failed"); 352 | progressBar.setString("Error"); 353 | progressBar.setTextColor(Color.RED); 354 | } else { 355 | logger.info("Completed execution"); 356 | progressBar.setString("Complete"); 357 | progressBar.setTextColor(Color.WHITE); 358 | updateDirectoryTree(apkAnalysisDetails.getBaseDir()); 359 | ((DefaultTreeModel) directoryTree.getModel()).reload(rootNode); 360 | displayUnpackerFile(); 361 | logger.info("File tree updated with dynamic artifacts directory"); 362 | } 363 | } catch (Exception e) { 364 | e.printStackTrace(); 365 | logger.error("Error executing code: " + e.getMessage()); 366 | textArea.append("Error executing code: " + e.getMessage() + "\n"); 367 | progressBar.setString("Error"); 368 | progressBar.setTextColor(Color.RED); 369 | } 370 | } 371 | 372 | private static void redirectProcessOutput(Process process, JTextArea textArea) { 373 | new Thread(() -> { 374 | try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) { 375 | String line; 376 | while ((line = reader.readLine()) != null) { 377 | textArea.append(line + "\n"); 378 | } 379 | } catch (IOException e) { 380 | e.printStackTrace(); 381 | } 382 | }).start(); 383 | 384 | new Thread(() -> { 385 | try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()))) { 386 | String line; 387 | while ((line = reader.readLine()) != null) { 388 | textArea.append(line + "\n"); 389 | } 390 | } catch (IOException e) { 391 | e.printStackTrace(); 392 | } 393 | }).start(); 394 | } 395 | 396 | 397 | private static void findNextOccurrence(String searchString) { 398 | String content = rightPanelEditorPane.getText(); 399 | int currentPosition = rightPanelEditorPane.getCaretPosition(); 400 | int nextPosition = content.indexOf(searchString, currentPosition); 401 | 402 | if (nextPosition != -1) { 403 | rightPanelEditorPane.setCaretPosition(nextPosition); 404 | rightPanelEditorPane.select(nextPosition, nextPosition + searchString.length()); 405 | } else { 406 | // If no more occurrences, optionally wrap around to the start 407 | nextPosition = content.indexOf(searchString); 408 | if (nextPosition != -1) { 409 | rightPanelEditorPane.setCaretPosition(nextPosition); 410 | rightPanelEditorPane.select(nextPosition, nextPosition + searchString.length()); 411 | } 412 | } 413 | } 414 | 415 | private static void findPreviousOccurrence(String searchString) { 416 | String content = rightPanelEditorPane.getText(); 417 | int currentPosition = rightPanelEditorPane.getCaretPosition(); 418 | int previousPosition = content.lastIndexOf(searchString, currentPosition - searchString.length() - 1); 419 | 420 | if (previousPosition != -1) { 421 | rightPanelEditorPane.setCaretPosition(previousPosition); 422 | rightPanelEditorPane.select(previousPosition, previousPosition + searchString.length()); 423 | } else { 424 | // If no more occurrences, optionally wrap around to the end 425 | previousPosition = content.lastIndexOf(searchString); 426 | if (previousPosition != -1) { 427 | rightPanelEditorPane.setCaretPosition(previousPosition); 428 | rightPanelEditorPane.select(previousPosition, previousPosition + searchString.length()); 429 | } 430 | } 431 | } 432 | 433 | private static void saveFile() { 434 | if (currentFilePath != null) { 435 | try { 436 | Files.write(Paths.get(currentFilePath), rightPanelEditorPane.getText().getBytes()); 437 | logger.info("File saved: " + currentFilePath); 438 | } catch (IOException e) { 439 | logger.error("Error saving file: " + currentFilePath, e); 440 | } 441 | } else { 442 | logger.warn("No file selected to save."); 443 | } 444 | } 445 | 446 | 447 | private static String getFilePath(DefaultMutableTreeNode node) { 448 | FileNode fileNode = (FileNode) node.getUserObject(); 449 | return fileNode.getFile().getAbsolutePath(); 450 | } 451 | 452 | private static List isPacked(String apkFilePath, JadxDecompiler jadx) { 453 | List packedClasses = new ArrayList<>(); 454 | try { 455 | // Extract and parse AndroidManifest.xml 456 | Set manifestClasses = JadxUtils.getManifestClasses(apkFilePath, jadx); 457 | 458 | // Get classes from dex files 459 | Set dexClasses = JadxUtils.getDexClasses(apkFilePath, jadx); 460 | 461 | // Check if there are any classes in the manifest that are not in the dex files 462 | for (String className : manifestClasses) { 463 | if (!dexClasses.contains(className)) { 464 | logger.info("Class {} found in manifest but not in dex files", className); 465 | packedClasses.add(className); 466 | } 467 | } 468 | } catch (Exception e) { 469 | logger.error("Error checking if APK is packed", e); 470 | } 471 | return packedClasses; // Return the list of packed classes 472 | } 473 | 474 | // Modify the analyzeApk method to update the progress bar 475 | private static void analyzeApk(String apkFilePath, DefaultMutableTreeNode apkDetailsRoot) { 476 | SwingWorker worker = new SwingWorker() { 477 | @Override 478 | protected Void doInBackground() { 479 | logger.info("Loading APK"); 480 | JadxDecompiler jadx = JadxUtils.loadJadx(apkFilePath); 481 | 482 | List packedClasses = isPacked(apkFilePath, jadx); 483 | if (!packedClasses.isEmpty()) { 484 | logger.info("APK is packed"); 485 | 486 | DefaultMutableTreeNode missingClassesNode = new DefaultMutableTreeNode("Missing Classes"); 487 | apkDetailsRoot.add(missingClassesNode); 488 | for (String className : packedClasses) { 489 | missingClassesNode.add(new DefaultMutableTreeNode(className)); 490 | } 491 | 492 | List dexLoadingDetails = DynamicDexLoaderDetection.getJavaDexLoadingDetails(jadx); 493 | if (!dexLoadingDetails.isEmpty()) { 494 | logger.info("Generating Java unpacker stub"); 495 | DefaultMutableTreeNode classLoaderNode = new DefaultMutableTreeNode("Code Loader Details"); 496 | classLoaderNode.add(new DefaultMutableTreeNode("Type: Java")); 497 | 498 | for (String detail : dexLoadingDetails) { 499 | classLoaderNode.add(new DefaultMutableTreeNode(detail)); 500 | } 501 | 502 | apkDetailsRoot.add(classLoaderNode); 503 | 504 | apkAnalysisDetails = UnpackerGenerator.generateJava(jadx, apkFilePath); 505 | if (apkAnalysisDetails.getBaseDir() != null) { 506 | SwingUtilities.invokeLater(() -> updateDirectoryTree(apkAnalysisDetails.getBaseDir())); 507 | } else { 508 | logger.error("Error generating Java unpacker code."); 509 | } 510 | } else { 511 | logger.info("Could not find code loader in Java. Probable native packer detected."); 512 | DefaultMutableTreeNode classLoaderNode = new DefaultMutableTreeNode("Code Loader Details"); 513 | classLoaderNode.add(new DefaultMutableTreeNode("Type: Native")); 514 | apkDetailsRoot.add(classLoaderNode); 515 | } 516 | } else { 517 | logger.info("APK is not packed"); 518 | DefaultMutableTreeNode packerNode = new DefaultMutableTreeNode("Packer"); 519 | packerNode.add(new DefaultMutableTreeNode("Not Packed")); 520 | apkDetailsRoot.add(packerNode); 521 | } 522 | 523 | return null; 524 | } 525 | 526 | @Override 527 | protected void done() { 528 | SwingUtilities.invokeLater(() -> { 529 | ((DefaultTreeModel) apkDetailsTree.getModel()).reload(apkDetailsRoot); 530 | displayUnpackerFile(); 531 | progressBar.setIndeterminate(false); 532 | progressBar.setValue(100); 533 | progressBar.setString("Complete"); 534 | progressBar.setTextColor(Color.WHITE); 535 | }); 536 | } 537 | }; 538 | worker.execute(); 539 | } 540 | 541 | private static void displayUnpackerFile() { 542 | DefaultMutableTreeNode root = (DefaultMutableTreeNode) directoryTree.getModel().getRoot(); 543 | DefaultMutableTreeNode targetNode = findNode(root, "Unpacker_", ".java"); 544 | 545 | if (targetNode != null) { 546 | String filePath = getFilePath(targetNode); 547 | if (filePath != null) { 548 | currentFilePath = filePath; 549 | try { 550 | // We'll use this path for other things as well 551 | pathToUnpacker = filePath; 552 | 553 | Path path = Paths.get(filePath); 554 | if (Files.isRegularFile(path)) { 555 | String content = new String(Files.readAllBytes(path), StandardCharsets.UTF_8); 556 | rightPanelEditorPane.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVA); 557 | rightPanelEditorPane.setText(content); 558 | rightPanelEditorPane.setCaretPosition(0); 559 | 560 | // Expand the path to the target node 561 | TreePath treePath = new TreePath(targetNode.getPath()); 562 | directoryTree.scrollPathToVisible(treePath); 563 | directoryTree.setSelectionPath(treePath); 564 | directoryTree.expandPath(treePath); 565 | } 566 | } catch (Exception ex) { 567 | ex.printStackTrace(); 568 | rightPanelEditorPane.setText("Error loading file: " + ex.getMessage()); 569 | } 570 | } 571 | } else { 572 | rightPanelEditorPane.setText("Entry file not found."); 573 | } 574 | } 575 | 576 | private static DefaultMutableTreeNode findNode(DefaultMutableTreeNode root, String prefix, String suffix) { 577 | Enumeration e = root.breadthFirstEnumeration(); 578 | while (e.hasMoreElements()) { 579 | DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.nextElement(); 580 | if (node.getUserObject() instanceof FileNode) { 581 | FileNode fileNode = (FileNode) node.getUserObject(); 582 | String fileName = fileNode.getFile().getName(); 583 | if (fileName.startsWith(prefix) && fileName.endsWith(suffix)) { 584 | return node; 585 | } 586 | } 587 | } 588 | return null; 589 | } 590 | 591 | private static void updateDirectoryTree(File baseDir) { 592 | DefaultTreeModel treeModel = DirectoryTreeModel.buildTreeModel(baseDir); 593 | directoryTree.setModel(treeModel); 594 | } 595 | } 596 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/ui/CustomProgressBar.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.ui; 2 | 3 | import java.awt.Color; 4 | import java.awt.Font; 5 | import java.awt.FontMetrics; 6 | import java.awt.Graphics; 7 | 8 | import javax.swing.JProgressBar; 9 | 10 | public class CustomProgressBar extends JProgressBar { 11 | private Color textColor; 12 | 13 | public CustomProgressBar() { 14 | super(); 15 | this.textColor = Color.WHITE; // Default text color 16 | setFont(getFont().deriveFont(Font.BOLD, getFont().getSize() + 1)); 17 | } 18 | 19 | public void setTextColor(Color textColor) { 20 | this.textColor = textColor; 21 | repaint(); // Repaint to apply the new color 22 | } 23 | 24 | @Override 25 | protected void paintComponent(Graphics g) { 26 | super.paintComponent(g); 27 | if (isStringPainted()) { 28 | String progressString = getString(); 29 | FontMetrics fontMetrics = g.getFontMetrics(); 30 | int stringWidth = fontMetrics.stringWidth(progressString); 31 | int stringHeight = fontMetrics.getAscent(); 32 | int x = (getWidth() - stringWidth) / 2; 33 | int y = (getHeight() + stringHeight) / 2 - 3; 34 | g.setColor(textColor); 35 | g.drawString(progressString, x, y); 36 | } 37 | } 38 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/ui/DirectoryTreeModel.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.ui; 2 | 3 | import javax.swing.tree.DefaultMutableTreeNode; 4 | import javax.swing.tree.DefaultTreeModel; 5 | import java.io.File; 6 | 7 | public class DirectoryTreeModel { 8 | 9 | public static DefaultTreeModel buildTreeModel(File root) { 10 | DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode(new FileNode(root)); 11 | buildTreeNodes(rootNode, root); 12 | return new DefaultTreeModel(rootNode); 13 | } 14 | 15 | private static void buildTreeNodes(DefaultMutableTreeNode parentNode, File file) { 16 | if (file.isDirectory()) { 17 | for (File child : file.listFiles()) { 18 | DefaultMutableTreeNode childNode = new DefaultMutableTreeNode(new FileNode(child)); 19 | if (child.isDirectory()) { 20 | parentNode.add(childNode); 21 | buildTreeNodes(childNode, child); 22 | } else { 23 | parentNode.add(new DefaultMutableTreeNode(new FileNode(child))); 24 | } 25 | } 26 | } else { 27 | parentNode.add(new DefaultMutableTreeNode(new FileNode(file))); 28 | } 29 | } 30 | } 31 | 32 | class FileNode { 33 | private final File file; 34 | 35 | public FileNode(File file) { 36 | this.file = file; 37 | } 38 | 39 | public File getFile() { 40 | return file; 41 | } 42 | 43 | @Override 44 | public String toString() { 45 | return file.getName(); // Display only the name 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/ui/NoIconTreeCell.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.ui; 2 | 3 | import java.awt.Component; 4 | 5 | import javax.swing.JTree; 6 | import javax.swing.tree.DefaultTreeCellRenderer; 7 | 8 | public class NoIconTreeCell extends DefaultTreeCellRenderer { 9 | @Override 10 | public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) { 11 | super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus); 12 | setIcon(null); // Remove the icon 13 | return this; 14 | } 15 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/ui/SyntaxUtility.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.ui; 2 | 3 | import java.awt.Color; 4 | 5 | import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea; 6 | import org.fife.ui.rsyntaxtextarea.SyntaxScheme; 7 | import org.fife.ui.rsyntaxtextarea.Token; 8 | 9 | public class SyntaxUtility { 10 | public static void applyCustomTheme(RSyntaxTextArea textArea) { 11 | SyntaxScheme scheme = textArea.getSyntaxScheme(); 12 | 13 | // Common color for keywords, return statements, and boolean literals 14 | Color keywordColor = Color.decode("#569CD6"); 15 | 16 | // Define a color for operators (braces, parentheses, brackets) 17 | Color operatorColor = Color.WHITE; // Set operators to white 18 | 19 | // Define a more suitable shade of green for comments 20 | Color commentColor = Color.decode("#57A64A"); 21 | 22 | scheme.getStyle(Token.RESERVED_WORD).foreground = keywordColor; 23 | scheme.getStyle(Token.DATA_TYPE).foreground = Color.decode("#4EC9B0"); 24 | scheme.getStyle(Token.FUNCTION).foreground = Color.decode("#DCDCAA"); 25 | scheme.getStyle(Token.LITERAL_NUMBER_DECIMAL_INT).foreground = Color.decode("#B5CEA8"); 26 | scheme.getStyle(Token.LITERAL_STRING_DOUBLE_QUOTE).foreground = Color.decode("#CE9178"); 27 | scheme.getStyle(Token.COMMENT_MULTILINE).foreground = commentColor; 28 | scheme.getStyle(Token.COMMENT_DOCUMENTATION).foreground = commentColor; 29 | scheme.getStyle(Token.COMMENT_EOL).foreground = commentColor; // Single-line comments 30 | 31 | scheme.getStyle(Token.OPERATOR).foreground = operatorColor; // Operators to white 32 | scheme.getStyle(Token.SEPARATOR).foreground = operatorColor; 33 | scheme.getStyle(Token.RESERVED_WORD_2).foreground = keywordColor; 34 | scheme.getStyle(Token.LITERAL_BOOLEAN).foreground = keywordColor; // Boolean literals 35 | 36 | scheme.getStyle(Token.IDENTIFIER).foreground = Color.decode("#9CDCFE"); 37 | 38 | // Set the background color of the text area itself 39 | textArea.setBackground(Color.decode("#1E1E1E")); 40 | textArea.setCurrentLineHighlightColor(Color.decode("#264F78")); 41 | textArea.setFadeCurrentLineHighlight(true); 42 | 43 | // Apply the scheme to the text area 44 | textArea.revalidate(); 45 | textArea.repaint(); 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /BadUnboxing/src/main/java/com/lauriewired/ui/TextAreaOutputStream.java: -------------------------------------------------------------------------------- 1 | package com.lauriewired.ui; 2 | 3 | import java.io.IOException; 4 | import java.io.OutputStream; 5 | import javax.swing.JTextArea; 6 | 7 | public class TextAreaOutputStream extends OutputStream { 8 | private JTextArea textArea; 9 | 10 | public TextAreaOutputStream(JTextArea textArea) { 11 | this.textArea = textArea; 12 | } 13 | 14 | @Override 15 | public void write(int b) throws IOException { 16 | textArea.append(String.valueOf((char) b)); 17 | textArea.setCaretPosition(textArea.getDocument().getLength()); // Auto scroll to bottom 18 | } 19 | 20 | @Override 21 | public void write(byte[] b, int off, int len) throws IOException { 22 | textArea.append(new String(b, off, len)); 23 | textArea.setCaretPosition(textArea.getDocument().getLength()); // Auto scroll to bottom 24 | } 25 | } -------------------------------------------------------------------------------- /BadUnboxing/src/main/resources/icon.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LaurieWired/BadUnboxing/267ae640e556f43b87f8fdbda1c810c6c818f673/BadUnboxing/src/main/resources/icon.png -------------------------------------------------------------------------------- /BadUnboxing/src/main/resources/logback.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | %d{HH:mm:ss.SSS} %-5level %logger{36} - %msg%n 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright © 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 6 | 7 | Preamble 8 | The GNU Affero General Public License is a free, copyleft license for software and other kinds of works, specifically designed to ensure cooperation with the community in the case of network server software. 9 | 10 | The licenses for most software and other practical works are designed to take away your freedom to share and change the works. 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No Surrender of Others' Freedom. 157 | If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program. 158 | 159 | 13. 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The terms of this License will continue to apply to the part which is the covered work, but the work with which it is combined will remain governed by version 3 of the GNU General Public License. 163 | 164 | 14. Revised Versions of this License. 165 | The Free Software Foundation may publish revised and/or new versions of the GNU Affero General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. 166 | 167 | Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU Affero General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU Affero General Public License, you may choose any version ever published by the Free Software Foundation. 168 | 169 | If the Program specifies that a proxy can decide which future versions of the GNU Affero General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program. 170 | 171 | Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version. 172 | 173 | 15. Disclaimer of Warranty. 174 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 175 | 176 | 16. 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Interpretation of Sections 15 and 16. 180 | If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. 181 | 182 | END OF TERMS AND CONDITIONS 183 | 184 | How to Apply These Terms to Your New Programs 185 | If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. 186 | 187 | To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. 188 | 189 | 190 | Copyright (C) 191 | 192 | This program is free software: you can redistribute it and/or modify 193 | it under the terms of the GNU Affero General Public License as 194 | published by the Free Software Foundation, either version 3 of the 195 | License, or (at your option) any later version. 196 | 197 | This program is distributed in the hope that it will be useful, 198 | but WITHOUT ANY WARRANTY; without even the implied warranty of 199 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 200 | GNU Affero General Public License for more details. 201 | 202 | You should have received a copy of the GNU Affero General Public License 203 | along with this program. If not, see . 204 | Also add information on how to contact you by electronic and paper mail. 205 | 206 | If your software can interact with users remotely through a computer network, you should also make sure that it provides a way for users to get its source. For example, if your program is a web application, its interface could display a "Source" link that leads users to an archive of the code. There are many ways you could offer source, and different solutions will be better for different programs; see section 13 for the specific requirements. 207 | 208 | You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU AGPL, see . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ![BadUnboxing logo](https://github.com/LaurieWired/BadUnboxing/blob/main/media/bad_unboxing_logo.png) 2 | [![License](https://img.shields.io/badge/License-AGPL%20v3-blue.svg)](https://www.gnu.org/licenses/agpl-3.0) 3 | [![GitHub release (latest by date)](https://img.shields.io/github/v/release/LaurieWired/BadUnboxing)](https://github.com/LaurieWired/BadUnboxing/releases) 4 | [![GitHub stars](https://img.shields.io/github/stars/LaurieWired/BadUnboxing)](https://github.com/LaurieWired/BadUnboxing/stargazers) 5 | [![GitHub forks](https://img.shields.io/github/forks/LaurieWired/BadUnboxing)](https://github.com/LaurieWired/BadUnboxing/network/members) 6 | [![GitHub contributors](https://img.shields.io/github/contributors/LaurieWired/BadUnboxing)](https://github.com/LaurieWired/BadUnboxing/graphs/contributors) 7 | [![Follow @lauriewired](https://img.shields.io/twitter/follow/lauriewired?style=social)](https://twitter.com/lauriewired) 8 | 9 | # Description 10 | 11 | BADUnboxing is an automated Android unpacker. It works by locating and decompiling code inside the APK that is relevant to the unpacking process. 12 | 13 | Once Bad Unboxing detects packing, it automatically generates a new Java application based on the decompiled code. This new application can be executed to drop dynamic unpacked artifacts to disk. 14 | 15 | https://github.com/LaurieWired/BadUnboxing/assets/123765654/b023fbad-a4a3-49fd-9572-61222c08c816 16 | 17 | 18 | 19 | # Installation 20 | 21 | A precompiled JAR file, as well as helper startup scripts are provided in the [Releases Page](https://github.com/LaurieWired/BadUnboxing/releases/) 22 | 23 | 24 | # Usage 25 | 26 | ### Check out the **[Wiki](https://github.com/LaurieWired/BadUnboxing/wiki)** for more detials. 27 | 28 | ### Official Tutorial Video: [Bad Unboxing: Automated Android Unpacking](https://www.youtube.com/watch?v=8GbV3RWVo4A) 29 | 30 | 31 | # Contribute 32 | - Make a pull request 33 | - Add a new Unpacking Module 34 | - Add an Example to our Wiki 35 | - Report an error/issue 36 | - Suggest an improvement 37 | - Share with others or give a star! 38 | 39 | Your contributions are greatly appreciated and will help make BADUnboxing an even more powerful and versatile tool for the Android Reverse Engineering community. 40 | 41 | # License 42 | 43 | BadUnboxing is licensed under the GNU Affero General Public License v3.0. See the [LICENSE](https://www.gnu.org/licenses/agpl-3.0) file for more information. 44 | 45 | # Screenshots 46 | 47 | ### Basic BadUnboxing View 48 | ![BadUnboxingMainWindow](https://github.com/LaurieWired/BadUnboxing/blob/main/media/Main_Window.png) 49 | 50 | ### Confirm Generated Unpacker Execution 51 | ![BadUnboxingUnpackerExecution](https://github.com/LaurieWired/BadUnboxing/blob/main/media/confirm_execution.png) 52 | -------------------------------------------------------------------------------- /media/Bad_Unboxing_Demo.mp4: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LaurieWired/BadUnboxing/267ae640e556f43b87f8fdbda1c810c6c818f673/media/Bad_Unboxing_Demo.mp4 -------------------------------------------------------------------------------- /media/Main_Window.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LaurieWired/BadUnboxing/267ae640e556f43b87f8fdbda1c810c6c818f673/media/Main_Window.png -------------------------------------------------------------------------------- /media/bad_unboxing_logo.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LaurieWired/BadUnboxing/267ae640e556f43b87f8fdbda1c810c6c818f673/media/bad_unboxing_logo.png -------------------------------------------------------------------------------- /media/confirm_execution.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LaurieWired/BadUnboxing/267ae640e556f43b87f8fdbda1c810c6c818f673/media/confirm_execution.png --------------------------------------------------------------------------------