├── LICENSE ├── MachOParser.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ └── contents.xcworkspacedata └── xcuserdata │ └── patrick.xcuserdatad │ ├── xcdebugger │ └── Breakpoints_v2.xcbkptlist │ └── xcschemes │ ├── MachOParser.xcscheme │ └── xcschememanagement.plist └── MachOParser ├── MachO.h ├── MachO.m └── main.m /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /MachOParser.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 4 | classes = { 5 | }; 6 | objectVersion = 46; 7 | objects = { 8 | 9 | /* Begin PBXBuildFile section */ 10 | CDB426611A8B209800749E80 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = CDB426601A8B209800749E80 /* main.m */; }; 11 | CDB426691A8B20B800749E80 /* MachO.m in Sources */ = {isa = PBXBuildFile; fileRef = CDB426681A8B20B800749E80 /* MachO.m */; }; 12 | /* End PBXBuildFile section */ 13 | 14 | /* Begin PBXCopyFilesBuildPhase section */ 15 | CDB4265B1A8B209800749E80 /* CopyFiles */ = { 16 | isa = PBXCopyFilesBuildPhase; 17 | buildActionMask = 2147483647; 18 | dstPath = /usr/share/man/man1/; 19 | dstSubfolderSpec = 0; 20 | files = ( 21 | ); 22 | runOnlyForDeploymentPostprocessing = 1; 23 | }; 24 | /* End PBXCopyFilesBuildPhase section */ 25 | 26 | /* Begin PBXFileReference section */ 27 | CDB4265D1A8B209800749E80 /* MachOParser */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = MachOParser; sourceTree = BUILT_PRODUCTS_DIR; }; 28 | CDB426601A8B209800749E80 /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = ""; }; 29 | CDB426671A8B20B800749E80 /* MachO.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MachO.h; sourceTree = ""; }; 30 | CDB426681A8B20B800749E80 /* MachO.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MachO.m; sourceTree = ""; }; 31 | /* End PBXFileReference section */ 32 | 33 | /* Begin PBXFrameworksBuildPhase section */ 34 | CDB4265A1A8B209800749E80 /* Frameworks */ = { 35 | isa = PBXFrameworksBuildPhase; 36 | buildActionMask = 2147483647; 37 | files = ( 38 | ); 39 | runOnlyForDeploymentPostprocessing = 0; 40 | }; 41 | /* End PBXFrameworksBuildPhase section */ 42 | 43 | /* Begin PBXGroup section */ 44 | CDB426541A8B209800749E80 = { 45 | isa = PBXGroup; 46 | children = ( 47 | CDB4265F1A8B209800749E80 /* MachOParser */, 48 | CDB4265E1A8B209800749E80 /* Products */, 49 | ); 50 | sourceTree = ""; 51 | }; 52 | CDB4265E1A8B209800749E80 /* Products */ = { 53 | isa = PBXGroup; 54 | children = ( 55 | CDB4265D1A8B209800749E80 /* MachOParser */, 56 | ); 57 | name = Products; 58 | sourceTree = ""; 59 | }; 60 | CDB4265F1A8B209800749E80 /* MachOParser */ = { 61 | isa = PBXGroup; 62 | children = ( 63 | CDB426601A8B209800749E80 /* main.m */, 64 | CDB426671A8B20B800749E80 /* MachO.h */, 65 | CDB426681A8B20B800749E80 /* MachO.m */, 66 | ); 67 | path = MachOParser; 68 | sourceTree = ""; 69 | }; 70 | /* End PBXGroup section */ 71 | 72 | /* Begin PBXNativeTarget section */ 73 | CDB4265C1A8B209800749E80 /* MachOParser */ = { 74 | isa = PBXNativeTarget; 75 | buildConfigurationList = CDB426641A8B209800749E80 /* Build configuration list for PBXNativeTarget "MachOParser" */; 76 | buildPhases = ( 77 | CDB426591A8B209800749E80 /* Sources */, 78 | CDB4265A1A8B209800749E80 /* Frameworks */, 79 | CDB4265B1A8B209800749E80 /* CopyFiles */, 80 | ); 81 | buildRules = ( 82 | ); 83 | dependencies = ( 84 | ); 85 | name = MachOParser; 86 | productName = MachOParser; 87 | productReference = CDB4265D1A8B209800749E80 /* MachOParser */; 88 | productType = "com.apple.product-type.tool"; 89 | }; 90 | /* End PBXNativeTarget section */ 91 | 92 | /* Begin PBXProject section */ 93 | CDB426551A8B209800749E80 /* Project object */ = { 94 | isa = PBXProject; 95 | attributes = { 96 | LastUpgradeCheck = 0610; 97 | ORGANIZATIONNAME = "Patrick Wardle"; 98 | TargetAttributes = { 99 | CDB4265C1A8B209800749E80 = { 100 | CreatedOnToolsVersion = 6.1.1; 101 | }; 102 | }; 103 | }; 104 | buildConfigurationList = CDB426581A8B209800749E80 /* Build configuration list for PBXProject "MachOParser" */; 105 | compatibilityVersion = "Xcode 3.2"; 106 | developmentRegion = English; 107 | hasScannedForEncodings = 0; 108 | knownRegions = ( 109 | en, 110 | ); 111 | mainGroup = CDB426541A8B209800749E80; 112 | productRefGroup = CDB4265E1A8B209800749E80 /* Products */; 113 | projectDirPath = ""; 114 | projectRoot = ""; 115 | targets = ( 116 | CDB4265C1A8B209800749E80 /* MachOParser */, 117 | ); 118 | }; 119 | /* End PBXProject section */ 120 | 121 | /* Begin PBXSourcesBuildPhase section */ 122 | CDB426591A8B209800749E80 /* Sources */ = { 123 | isa = PBXSourcesBuildPhase; 124 | buildActionMask = 2147483647; 125 | files = ( 126 | CDB426691A8B20B800749E80 /* MachO.m in Sources */, 127 | CDB426611A8B209800749E80 /* main.m in Sources */, 128 | ); 129 | runOnlyForDeploymentPostprocessing = 0; 130 | }; 131 | /* End PBXSourcesBuildPhase section */ 132 | 133 | /* Begin XCBuildConfiguration section */ 134 | CDB426621A8B209800749E80 /* Debug */ = { 135 | isa = XCBuildConfiguration; 136 | buildSettings = { 137 | ALWAYS_SEARCH_USER_PATHS = NO; 138 | CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x"; 139 | CLANG_CXX_LIBRARY = "libc++"; 140 | CLANG_ENABLE_MODULES = YES; 141 | CLANG_ENABLE_OBJC_ARC = YES; 142 | CLANG_WARN_BOOL_CONVERSION = YES; 143 | CLANG_WARN_CONSTANT_CONVERSION = YES; 144 | CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR; 145 | CLANG_WARN_EMPTY_BODY = YES; 146 | CLANG_WARN_ENUM_CONVERSION = YES; 147 | CLANG_WARN_INT_CONVERSION = YES; 148 | CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR; 149 | CLANG_WARN_UNREACHABLE_CODE = YES; 150 | CLANG_WARN__DUPLICATE_METHOD_MATCH = YES; 151 | COPY_PHASE_STRIP = NO; 152 | ENABLE_STRICT_OBJC_MSGSEND = YES; 153 | GCC_C_LANGUAGE_STANDARD = gnu99; 154 | GCC_DYNAMIC_NO_PIC = NO; 155 | GCC_OPTIMIZATION_LEVEL = 0; 156 | GCC_PREPROCESSOR_DEFINITIONS = ( 157 | "DEBUG=1", 158 | "$(inherited)", 159 | ); 160 | GCC_SYMBOLS_PRIVATE_EXTERN = NO; 161 | GCC_WARN_64_TO_32_BIT_CONVERSION = YES; 162 | GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR; 163 | GCC_WARN_UNDECLARED_SELECTOR = YES; 164 | GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE; 165 | GCC_WARN_UNUSED_FUNCTION = YES; 166 | GCC_WARN_UNUSED_VARIABLE = YES; 167 | MACOSX_DEPLOYMENT_TARGET = 10.10; 168 | MTL_ENABLE_DEBUG_INFO = YES; 169 | ONLY_ACTIVE_ARCH = YES; 170 | SDKROOT = macosx; 171 | }; 172 | name = Debug; 173 | }; 174 | CDB426631A8B209800749E80 /* Release */ = { 175 | isa = XCBuildConfiguration; 176 | buildSettings = { 177 | ALWAYS_SEARCH_USER_PATHS = NO; 178 | CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x"; 179 | CLANG_CXX_LIBRARY = "libc++"; 180 | CLANG_ENABLE_MODULES = YES; 181 | CLANG_ENABLE_OBJC_ARC = YES; 182 | CLANG_WARN_BOOL_CONVERSION = YES; 183 | CLANG_WARN_CONSTANT_CONVERSION = YES; 184 | CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR; 185 | CLANG_WARN_EMPTY_BODY = YES; 186 | CLANG_WARN_ENUM_CONVERSION = YES; 187 | CLANG_WARN_INT_CONVERSION = YES; 188 | CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR; 189 | CLANG_WARN_UNREACHABLE_CODE = YES; 190 | CLANG_WARN__DUPLICATE_METHOD_MATCH = YES; 191 | COPY_PHASE_STRIP = YES; 192 | DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym"; 193 | ENABLE_NS_ASSERTIONS = NO; 194 | ENABLE_STRICT_OBJC_MSGSEND = YES; 195 | GCC_C_LANGUAGE_STANDARD = gnu99; 196 | GCC_WARN_64_TO_32_BIT_CONVERSION = YES; 197 | GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR; 198 | GCC_WARN_UNDECLARED_SELECTOR = YES; 199 | GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE; 200 | GCC_WARN_UNUSED_FUNCTION = YES; 201 | GCC_WARN_UNUSED_VARIABLE = YES; 202 | MACOSX_DEPLOYMENT_TARGET = 10.10; 203 | MTL_ENABLE_DEBUG_INFO = NO; 204 | SDKROOT = macosx; 205 | }; 206 | name = Release; 207 | }; 208 | CDB426651A8B209800749E80 /* Debug */ = { 209 | isa = XCBuildConfiguration; 210 | buildSettings = { 211 | PRODUCT_NAME = "$(TARGET_NAME)"; 212 | }; 213 | name = Debug; 214 | }; 215 | CDB426661A8B209800749E80 /* Release */ = { 216 | isa = XCBuildConfiguration; 217 | buildSettings = { 218 | PRODUCT_NAME = "$(TARGET_NAME)"; 219 | }; 220 | name = Release; 221 | }; 222 | /* End XCBuildConfiguration section */ 223 | 224 | /* Begin XCConfigurationList section */ 225 | CDB426581A8B209800749E80 /* Build configuration list for PBXProject "MachOParser" */ = { 226 | isa = XCConfigurationList; 227 | buildConfigurations = ( 228 | CDB426621A8B209800749E80 /* Debug */, 229 | CDB426631A8B209800749E80 /* Release */, 230 | ); 231 | defaultConfigurationIsVisible = 0; 232 | defaultConfigurationName = Release; 233 | }; 234 | CDB426641A8B209800749E80 /* Build configuration list for PBXNativeTarget "MachOParser" */ = { 235 | isa = XCConfigurationList; 236 | buildConfigurations = ( 237 | CDB426651A8B209800749E80 /* Debug */, 238 | CDB426661A8B209800749E80 /* Release */, 239 | ); 240 | defaultConfigurationIsVisible = 0; 241 | }; 242 | /* End XCConfigurationList section */ 243 | }; 244 | rootObject = CDB426551A8B209800749E80 /* Project object */; 245 | } 246 | -------------------------------------------------------------------------------- /MachOParser.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /MachOParser.xcodeproj/xcuserdata/patrick.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | -------------------------------------------------------------------------------- /MachOParser.xcodeproj/xcuserdata/patrick.xcuserdatad/xcschemes/MachOParser.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 51 | 52 | 58 | 59 | 60 | 61 | 64 | 65 | 66 | 67 | 68 | 69 | 75 | 76 | 82 | 83 | 84 | 85 | 87 | 88 | 91 | 92 | 93 | -------------------------------------------------------------------------------- /MachOParser.xcodeproj/xcuserdata/patrick.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | MachOParser.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | CDB4265C1A8B209800749E80 16 | 17 | primary 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /MachOParser/MachO.h: -------------------------------------------------------------------------------- 1 | // 2 | // MachO.h 3 | // MachOParser 4 | // 5 | // Created by Patrick Wardle on 2/6/15. 6 | // Copyright (c) 2015 Objective-See, LLC. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | /* CONSTS */ 12 | 13 | //dictionary keys 14 | #define KEY_BINARY_PATH @"binaryPath" 15 | #define KEY_MACHO_HEADERS @"machoHeaders" 16 | #define KEY_LOAD_COMMANDS @"loadCommands" 17 | 18 | #define KEY_HEADER_OFFSET @"headerOffset" 19 | #define KEY_HEADER_SIZE @"headerSize" 20 | #define KEY_HEADER_BINARY_TYPE @"headerType" 21 | #define KEY_HEADER_BYTE_ORDER @"headerByteOrder" 22 | #define KEY_IS_PACKED @"isPacked" 23 | #define KEY_IS_ENCRYPTED @"isEncryted" 24 | 25 | #define KEY_LC_RPATHS @"lcRpath" 26 | #define KEY_LC_REEXPORT_DYLIBS @"lcRexports" 27 | #define KEY_LC_LOAD_DYLIBS @"lcLoadDylib" 28 | #define KEY_LC_LOAD_WEAK_DYLIBS @"lcLoadWeakDylib" 29 | 30 | 31 | @interface MachO : NSObject 32 | { 33 | 34 | } 35 | 36 | //info dictionary 37 | // ->contains everything parsed out of the file 38 | @property(nonatomic, retain)NSMutableDictionary* binaryInfo; 39 | 40 | //binary's data 41 | @property(nonatomic, retain)NSData* binaryData; 42 | 43 | //segment names found in various packers 44 | @property(nonatomic, retain)NSSet* packerSegmentNames; 45 | 46 | 47 | /* METHODS */ 48 | 49 | //parse a binary 50 | // ->extract all required/interesting stuff 51 | -(BOOL)parse:(NSString*)binaryPath classify:(BOOL)shouldClassify; 52 | 53 | 54 | @end 55 | -------------------------------------------------------------------------------- /MachOParser/MachO.m: -------------------------------------------------------------------------------- 1 | // 2 | // MachO.m 3 | // MachOParser 4 | // 5 | // Created by Patrick Wardle on 2/6/15. 6 | // Copyright (c) 2015 Objective-See, LLC. All rights reserved. 7 | // 8 | 9 | #import "MachO.h" 10 | 11 | #import 12 | #import 13 | #import 14 | #import 15 | #import 16 | 17 | @implementation MachO 18 | 19 | @synthesize binaryInfo; 20 | @synthesize binaryData; 21 | @synthesize packerSegmentNames; 22 | 23 | //init 24 | -(id)init 25 | { 26 | //init super 27 | self = [super init]; 28 | if(nil != self) 29 | { 30 | //alloc info dictionary 31 | // ->contains everything collected about the file 32 | binaryInfo = [NSMutableDictionary dictionary]; 33 | 34 | //init array for machO headers 35 | self.binaryInfo[KEY_MACHO_HEADERS] = [NSMutableArray array]; 36 | 37 | //init array for LC_RPATHS 38 | self.binaryInfo[KEY_LC_RPATHS] = [NSMutableArray array]; 39 | 40 | //init array for LC_REEXPORT_DYLIBs 41 | self.binaryInfo[KEY_LC_REEXPORT_DYLIBS] = [NSMutableArray array]; 42 | 43 | //init array for LC_LOAD_DYLIBs 44 | self.binaryInfo[KEY_LC_LOAD_DYLIBS] = [NSMutableArray array]; 45 | 46 | //init array for LC_LOAD_WEAK_DYLIBs 47 | self.binaryInfo[KEY_LC_LOAD_WEAK_DYLIBS] = [NSMutableArray array]; 48 | 49 | //init packer seg names 50 | // upx: __XHDR 51 | // mpress: __MPRESS__* 52 | packerSegmentNames = [NSSet setWithObjects:@"__XHDR", @"__MPRESS__", nil]; 53 | } 54 | 55 | return self; 56 | } 57 | 58 | //parse a binary 59 | // ->extract all required/interesting stuff 60 | -(BOOL)parse:(NSString*)binaryPath classify:(BOOL)shouldClassify 61 | { 62 | //ret var 63 | BOOL wasParsed = NO; 64 | 65 | //dbg msg 66 | //NSLog(@"parsing %@", binaryPath); 67 | 68 | //save path 69 | self.binaryInfo[KEY_BINARY_PATH] = binaryPath; 70 | 71 | //load binary into memory 72 | self.binaryData = [NSData dataWithContentsOfFile:binaryPath]; 73 | if( (nil == self.binaryData) || 74 | (NULL == [self.binaryData bytes]) ) 75 | { 76 | //err msg 77 | //NSLog(@"OBJECTIVE-SEE ERROR: failed to load %@ into memory", binaryPath); 78 | 79 | //bail 80 | goto bail; 81 | } 82 | 83 | //parse headers 84 | // ->populates 'KEY_MACHO_HEADERS' array in 'binaryInfo' iVar 85 | if(YES != [self parseHeaders]) 86 | { 87 | //err msg 88 | //NSLog(@"OBJECTIVE-SEE ERROR: failed to find any machO headers"); 89 | 90 | //bail 91 | goto bail; 92 | } 93 | 94 | //parse headers 95 | // ->populates 'KEY_MACHO_HEADERS' array in 'binaryInfo' iVar 96 | if(YES != [self parseLoadCmds]) 97 | { 98 | //err msg 99 | //NSLog(@"OBJECTIVE-SEE ERROR: failed to parse load commands"); 100 | 101 | //bail 102 | goto bail; 103 | } 104 | 105 | //dbg msg 106 | //NSLog(@"parsed load commands"); 107 | 108 | //only do packer/encryption checks if specified 109 | if(YES == shouldClassify) 110 | { 111 | //first determine if binary is encrypted 112 | self.binaryInfo[KEY_IS_ENCRYPTED] = [NSNumber numberWithBool:[self isEncrypted]]; 113 | 114 | //all encrypted binaries will also appear packed 115 | // ->so only check if unencrypted binaries are unpacked 116 | if(YES != [self.binaryInfo[KEY_IS_ENCRYPTED] boolValue]) 117 | { 118 | //determine if packed 119 | self.binaryInfo[KEY_IS_PACKED] = [NSNumber numberWithBool:[self isPacked]]; 120 | } 121 | } 122 | 123 | //happy 124 | wasParsed = YES; 125 | 126 | //bail 127 | bail: 128 | 129 | return wasParsed; 130 | } 131 | 132 | //parse all machO headers 133 | -(BOOL)parseHeaders 134 | { 135 | //return var 136 | BOOL wasParsed = NO; 137 | 138 | //start of macho header 139 | const uint32_t *headerStart = NULL; 140 | 141 | //swapped flag 142 | BOOL shouldSwap = NO; 143 | 144 | //header dictionary 145 | NSDictionary* header = nil; 146 | 147 | //number of machO headers 148 | uint32_t headerCount = 0; 149 | 150 | //header offsets 151 | NSMutableArray* headerOffsets = nil; 152 | 153 | //per-architecture header 154 | struct fat_arch *arch = NULL; 155 | 156 | //pointer to binary's data 157 | const void* binaryBytes = NULL; 158 | 159 | //alloc array 160 | headerOffsets = [NSMutableArray array]; 161 | 162 | //grab binary's bytes 163 | binaryBytes = [self.binaryData bytes]; 164 | if(NULL == binaryBytes) 165 | { 166 | //bail 167 | goto bail; 168 | } 169 | 170 | //init start of header 171 | headerStart = binaryBytes; 172 | 173 | //handle universal (fat) case 174 | if( (FAT_MAGIC == *headerStart) || 175 | (FAT_CIGAM == *headerStart) ) 176 | { 177 | //dbg msg 178 | //NSLog(@"parsing universal binary"); 179 | 180 | //swap if needed 181 | if(FAT_CIGAM == *headerStart) 182 | { 183 | //set flag 184 | shouldSwap = YES; 185 | 186 | //swap 187 | swap_fat_header((struct fat_header*)headerStart, 0); 188 | } 189 | 190 | //get number of fat_arch structs 191 | // ->one per each architecture 192 | headerCount = ((struct fat_header*)binaryBytes)->nfat_arch; 193 | 194 | //get offsets of all headers 195 | for(uint32_t i = 0; i < headerCount; i++) 196 | { 197 | //get current struct fat_arch * 198 | // ->base + size of fat_header + size of fat_archs 199 | arch = (struct fat_arch*)((unsigned char*)binaryBytes + sizeof(struct fat_header) + i * sizeof(struct fat_arch)); 200 | 201 | //swap if needed 202 | if(YES == shouldSwap) 203 | { 204 | //swap 205 | swap_fat_arch(arch, 0x01, 0); 206 | } 207 | 208 | //sanity check 209 | // ->make sure arch is something 'within' binary 210 | if( ((unsigned char*)arch < (unsigned char*)binaryBytes) || 211 | ((unsigned char*)(binaryBytes + self.binaryData.length) < (unsigned char*)((unsigned char*)arch + sizeof(struct fat_arch))) ) 212 | { 213 | //err 214 | goto bail; 215 | } 216 | 217 | //save into header offset array 218 | [headerOffsets addObject:[NSNumber numberWithUnsignedInt:arch->offset]]; 219 | } 220 | } 221 | 222 | //not fat 223 | // ->just add start as (only) header offset 224 | else 225 | { 226 | //dbg msg 227 | //NSLog(@"parsing non-universal binary"); 228 | 229 | //add start 230 | [headerOffsets addObject:@0x0]; 231 | } 232 | 233 | //classify all headers 234 | for(NSNumber* headerOffset in headerOffsets) 235 | { 236 | //skip invalid header offsets 237 | if(headerOffset.unsignedIntValue > [self.binaryData length]) 238 | { 239 | //skip 240 | continue; 241 | } 242 | 243 | //grab start of header 244 | headerStart = binaryBytes + headerOffset.unsignedIntValue; 245 | 246 | //classify header 247 | switch(*headerStart) 248 | { 249 | //32bit mach-O 250 | // ->little-endian version 251 | case MH_CIGAM: 252 | 253 | //swap 254 | swap_mach_header((struct mach_header*)headerStart, 0); 255 | 256 | //init header dictionary 257 | header = @{ 258 | KEY_HEADER_OFFSET:headerOffset, 259 | KEY_HEADER_SIZE:@(sizeof(struct mach_header)), 260 | KEY_HEADER_BINARY_TYPE:[NSNumber numberWithInt:((struct mach_header*)headerStart)->filetype], 261 | KEY_HEADER_BYTE_ORDER: [NSNumber numberWithInt:LITTLE_ENDIAN], 262 | KEY_LOAD_COMMANDS: [[NSPointerArray alloc] initWithOptions:NSPointerFunctionsOpaqueMemory] 263 | }; 264 | 265 | //add header 266 | [self.binaryInfo[KEY_MACHO_HEADERS] addObject:header]; 267 | 268 | //next 269 | break; 270 | 271 | //32-bit mach-O 272 | // ->big-endian version 273 | case MH_MAGIC: 274 | 275 | //init header dictionary 276 | header = @{ 277 | KEY_HEADER_OFFSET:headerOffset, 278 | KEY_HEADER_SIZE:@(sizeof(struct mach_header)), 279 | KEY_HEADER_BINARY_TYPE:[NSNumber numberWithInt:((struct mach_header*)headerStart)->filetype], 280 | KEY_HEADER_BYTE_ORDER: [NSNumber numberWithInt:BIG_ENDIAN], 281 | KEY_LOAD_COMMANDS: [[NSPointerArray alloc] initWithOptions:NSPointerFunctionsOpaqueMemory] 282 | }; 283 | 284 | //add header 285 | [self.binaryInfo[KEY_MACHO_HEADERS] addObject:header]; 286 | 287 | //next 288 | break; 289 | 290 | //64-bit mach-O 291 | // ->little-endian version 292 | case MH_CIGAM_64: 293 | 294 | //swap 295 | swap_mach_header_64((struct mach_header_64*)headerStart, 0); 296 | 297 | //init header dictionary 298 | header = @{ 299 | KEY_HEADER_OFFSET:headerOffset, 300 | KEY_HEADER_SIZE:@(sizeof(struct mach_header_64)), 301 | KEY_HEADER_BINARY_TYPE:[NSNumber numberWithInt:((struct mach_header_64*)headerStart)->filetype], 302 | KEY_HEADER_BYTE_ORDER: [NSNumber numberWithInt:LITTLE_ENDIAN], 303 | KEY_LOAD_COMMANDS: [[NSPointerArray alloc] initWithOptions:NSPointerFunctionsOpaqueMemory] 304 | }; 305 | 306 | //add header 307 | [self.binaryInfo[KEY_MACHO_HEADERS] addObject:header]; 308 | 309 | //next 310 | break; 311 | 312 | //64-bit mach-O 313 | // ->big-endian version 314 | case MH_MAGIC_64: 315 | 316 | //init header dictionary 317 | header = @{ 318 | KEY_HEADER_OFFSET:headerOffset, 319 | KEY_HEADER_SIZE:@(sizeof(struct mach_header_64)), 320 | KEY_HEADER_BINARY_TYPE:[NSNumber numberWithInt:((struct mach_header_64*)headerStart)->filetype], 321 | KEY_HEADER_BYTE_ORDER: [NSNumber numberWithInt:BIG_ENDIAN], 322 | KEY_LOAD_COMMANDS: [[NSPointerArray alloc] initWithOptions:NSPointerFunctionsOpaqueMemory] 323 | }; 324 | 325 | //add header 326 | [self.binaryInfo[KEY_MACHO_HEADERS] addObject:header]; 327 | 328 | //next 329 | break; 330 | 331 | default: 332 | 333 | //err msg 334 | //NSLog(@"OBJECTIVE-SEE ERROR: unknown machO magic: %#x", *headerStart); 335 | 336 | //next 337 | break; 338 | 339 | }//switch, classifying headers 340 | 341 | }//for all headers 342 | 343 | //sanity check 344 | // ->make sure parser found at least one header 345 | if(0 != [self.binaryInfo[KEY_MACHO_HEADERS] count]) 346 | { 347 | //happy 348 | wasParsed = YES; 349 | } 350 | 351 | //bail 352 | bail: 353 | 354 | return wasParsed; 355 | } 356 | 357 | //parse the load commands 358 | // ->for now just save LC_RPATH, LC_LOAD_DYLIB, and LC_LOAD_WEAK_DYLIB 359 | -(BOOL)parseLoadCmds 360 | { 361 | //ret var 362 | BOOL wasParsed = NO; 363 | 364 | //pointer to load command structure 365 | struct load_command *loadCommand = NULL; 366 | 367 | //path in load commands such as LC_LOAD_DYLIB 368 | NSString* path = nil; 369 | 370 | //pointer to binary's data 371 | const void* binaryBytes = NULL; 372 | 373 | //current macho header 374 | struct mach_header* currentHeader = NULL; 375 | 376 | //grab binary's bytes 377 | binaryBytes = [self.binaryData bytes]; 378 | if(NULL == binaryBytes) 379 | { 380 | //bail 381 | goto bail; 382 | } 383 | 384 | //iterate over all machO headers 385 | for(NSDictionary* machoHeader in self.binaryInfo[KEY_MACHO_HEADERS]) 386 | { 387 | //get pointer to current machO header 388 | currentHeader = (struct mach_header*)(unsigned char*)(binaryBytes + [machoHeader[KEY_HEADER_OFFSET] unsignedIntegerValue]); 389 | 390 | //get first load command 391 | // ->immediately follows header 392 | loadCommand = (struct load_command*)(unsigned char*)(binaryBytes + [machoHeader[KEY_HEADER_OFFSET] unsignedIntegerValue] + [machoHeader[KEY_HEADER_SIZE] unsignedIntValue]); 393 | 394 | //iterate over all load commands 395 | // ->number of commands is in 'ncmds' member of (current) header struct 396 | for(uint32_t i = 0; i < currentHeader->ncmds; i++) 397 | { 398 | //sanity check load command 399 | if((unsigned char*)loadCommand > (unsigned char*)((unsigned char*)currentHeader + [machoHeader[KEY_HEADER_SIZE] unsignedIntegerValue] + currentHeader->sizeofcmds)) 400 | { 401 | //bail 402 | goto bail; 403 | } 404 | 405 | //swap if needed 406 | if(LITTLE_ENDIAN == [machoHeader[KEY_HEADER_BYTE_ORDER] unsignedIntegerValue]) 407 | { 408 | //swap 409 | // ->manually swap, cuz don't won't to affect in memory values 410 | switch (OSSwapBigToHostInt32(loadCommand->cmd)) 411 | { 412 | case LC_SEGMENT: 413 | 414 | //swap 415 | swap_segment_command((struct segment_command *)loadCommand, 0x0); 416 | break; 417 | 418 | case LC_SEGMENT_64: 419 | 420 | //swap 421 | swap_segment_command_64((struct segment_command_64 *)loadCommand, 0x0); 422 | break; 423 | 424 | default: 425 | 426 | //swap 427 | swap_load_command(loadCommand, 0x0); 428 | break; 429 | 430 | }//switch 431 | 432 | }//need to swap 433 | 434 | //save load command 435 | [machoHeader[KEY_LOAD_COMMANDS] addPointer:loadCommand]; 436 | 437 | //handle load commands of interest 438 | switch(loadCommand->cmd) 439 | { 440 | //LC_RPATHs 441 | // ->extract and save path 442 | case LC_RPATH: 443 | 444 | //extract name 445 | path = [self extractPath:loadCommand byteOrder:machoHeader[KEY_HEADER_BYTE_ORDER]]; 446 | 447 | //save if new 448 | if(YES != [self.binaryInfo[KEY_LC_RPATHS] containsObject:path]) 449 | { 450 | //save 451 | [self.binaryInfo[KEY_LC_RPATHS] addObject:path]; 452 | } 453 | 454 | break; 455 | 456 | //LC_REEXPORT_DYLIB 457 | // ->extract and save path 458 | case LC_REEXPORT_DYLIB: 459 | 460 | //extract name 461 | path = [self extractPath:loadCommand byteOrder:machoHeader[KEY_HEADER_BYTE_ORDER]]; 462 | 463 | //save if new 464 | if(YES != [self.binaryInfo[KEY_LC_REEXPORT_DYLIBS] containsObject:path]) 465 | { 466 | //save 467 | [self.binaryInfo[KEY_LC_REEXPORT_DYLIBS] addObject:path]; 468 | } 469 | 470 | break; 471 | 472 | //LC_LOAD_DYLIB and LC_LOAD_WEAK_DYLIB 473 | // ->extract and save path 474 | case LC_LOAD_DYLIB: 475 | case LC_LOAD_WEAK_DYLIB: 476 | 477 | //extract name 478 | path = [self extractPath:loadCommand byteOrder:machoHeader[KEY_HEADER_BYTE_ORDER]]; 479 | 480 | //save if new dylib 481 | if( (LC_LOAD_DYLIB == loadCommand->cmd) && 482 | (YES != [self.binaryInfo[KEY_LC_LOAD_DYLIBS] containsObject:path]) ) 483 | { 484 | //save 485 | [self.binaryInfo[KEY_LC_LOAD_DYLIBS] addObject:path]; 486 | } 487 | 488 | //save if new weak dylib 489 | else if( (LC_LOAD_WEAK_DYLIB == loadCommand->cmd) && 490 | (YES != [self.binaryInfo[KEY_LC_LOAD_WEAK_DYLIBS] containsObject:path]) ) 491 | { 492 | //save 493 | [self.binaryInfo[KEY_LC_LOAD_WEAK_DYLIBS] addObject:path]; 494 | } 495 | 496 | break; 497 | 498 | default: 499 | 500 | break; 501 | } 502 | 503 | //got to next load command 504 | // ->immediately follows current one 505 | loadCommand = (struct load_command *)(((unsigned char*)((unsigned char*)loadCommand + loadCommand->cmdsize))); 506 | 507 | }//all load commands 508 | 509 | }//all machO headers 510 | 511 | //happy 512 | wasParsed = YES; 513 | 514 | //bail 515 | bail: 516 | 517 | return wasParsed; 518 | } 519 | 520 | //determine if binary is encrypted 521 | // with OS X's native encryption scheme 522 | // see: http://osxbook.com/book/bonus/chapter7/tpmdrmmyth/ 523 | -(BOOL)isEncrypted 524 | { 525 | //flag 526 | BOOL encrypted = NO; 527 | 528 | //load command 529 | struct load_command* loadCommand = NULL; 530 | 531 | //flags 532 | uint32_t segmentFlags = 0; 533 | 534 | //check text segments 535 | // ->any marked encrypted; set flag 536 | for(NSMutableDictionary* machoHeader in self.binaryInfo[KEY_MACHO_HEADERS]) 537 | { 538 | //check all load commands 539 | for(NSUInteger i = 0; i< [machoHeader[KEY_LOAD_COMMANDS] count]; i++) 540 | { 541 | //grab load command 542 | loadCommand = [machoHeader[KEY_LOAD_COMMANDS] pointerAtIndex:i]; 543 | 544 | //ignore non-segments 545 | if( (loadCommand->cmd != LC_SEGMENT) && 546 | (loadCommand->cmd != LC_SEGMENT_64) ) 547 | { 548 | //skip 549 | continue; 550 | } 551 | 552 | //ignore everything that is not a text segment 553 | // ->for name check, segment_command & segment_command_64 are same 554 | if(0 != strncmp(((struct segment_command *)loadCommand)->segname, SEG_TEXT, sizeof(((struct segment_command *)loadCommand)->segname))) 555 | { 556 | //skip 557 | continue; 558 | } 559 | 560 | //grab flags 561 | // ->32bit 562 | if(sizeof(struct mach_header) == [machoHeader[KEY_HEADER_SIZE] integerValue]) 563 | { 564 | //flags 565 | segmentFlags = ((struct segment_command *)loadCommand)->flags; 566 | 567 | } 568 | //grab flags 569 | // ->64bit 570 | else if(sizeof(struct mach_header_64) == [machoHeader[KEY_HEADER_SIZE] integerValue]) 571 | { 572 | //flags 573 | segmentFlags = ((struct segment_command_64 *)loadCommand)->flags; 574 | 575 | } 576 | 577 | //check if segment is protected 578 | if(SG_PROTECTED_VERSION_1 == (segmentFlags & SG_PROTECTED_VERSION_1)) 579 | { 580 | //set flag 581 | encrypted = YES; 582 | 583 | //bail 584 | // ->any marked encrypted; set flag for all 585 | goto bail; 586 | } 587 | 588 | }//all load commands 589 | 590 | }//all macho headers (e.g. fat file) 591 | 592 | //bail 593 | bail: 594 | 595 | return encrypted; 596 | } 597 | 598 | //determine if packed 599 | // segment names and/or entropy 600 | // see: https://github.com/hiddenillusion/AnalyzePE/blob/master/peutils.py 601 | -(BOOL)isPacked 602 | { 603 | //flag 604 | BOOL packed = NO; 605 | 606 | //file's data 607 | NSData* fileData = nil; 608 | 609 | //file's data, as bytes 610 | char* fileBytes = NULL; 611 | 612 | //load command 613 | struct load_command* loadCommand = NULL; 614 | 615 | //segment offset 616 | u_int64_t segmentOffset = 0; 617 | 618 | //segment size 619 | u_int64_t segmentSize = 0; 620 | 621 | //segment entropy 622 | float segmentEntropy = 0.0f; 623 | 624 | //total 625 | float totalCompressedData = 0.0f; 626 | 627 | //segment name 628 | NSString* segmentName = nil; 629 | 630 | //segment name length 631 | NSUInteger segmentNameLength = 0; 632 | 633 | //open/read into file 634 | fileData = [NSData dataWithContentsOfFile:self.binaryInfo[KEY_BINARY_PATH]]; 635 | if(nil == fileData) 636 | { 637 | //bail 638 | goto bail; 639 | } 640 | 641 | //get raw bytes 642 | fileBytes = (char*)[fileData bytes]; 643 | 644 | //check text segments 645 | // ->any marked encrypted; set flag 646 | for(NSMutableDictionary* machoHeader in self.binaryInfo[KEY_MACHO_HEADERS]) 647 | { 648 | //check all load commands 649 | for(NSUInteger i = 0; i<[machoHeader[KEY_LOAD_COMMANDS] count]; i++) 650 | { 651 | //grab load command 652 | loadCommand = [machoHeader[KEY_LOAD_COMMANDS] pointerAtIndex:i]; 653 | 654 | //ignore non-segments 655 | if( (loadCommand->cmd != LC_SEGMENT) && 656 | (loadCommand->cmd != LC_SEGMENT_64) ) 657 | { 658 | //skip 659 | continue; 660 | } 661 | 662 | //init segment name length 663 | segmentNameLength = MIN(strlen(((struct segment_command *)loadCommand)->segname), sizeof(((struct segment_command *)loadCommand)->segname)); 664 | 665 | //sanity check 666 | if(0 == segmentNameLength) 667 | { 668 | //skip 669 | continue; 670 | } 671 | 672 | //init segment name 673 | segmentName = [[NSString alloc] initWithBytes:((struct segment_command *)loadCommand)->segname length:segmentNameLength encoding:NSUTF8StringEncoding]; 674 | 675 | //check if segment name matches known packer 676 | // ->upx, mpress etc have unique segment names 677 | if(YES == [self.packerSegmentNames containsObject:segmentName]) 678 | { 679 | //dbg msg 680 | //NSLog(@"found match w/ packed section: %@", segmentName); 681 | 682 | //got match 683 | packed = YES; 684 | 685 | //bail 686 | // ->its packed 687 | goto bail; 688 | 689 | } 690 | 691 | //32bit 692 | // ->get offset/size of segment 693 | if(sizeof(struct mach_header) == [machoHeader[KEY_HEADER_SIZE] integerValue]) 694 | { 695 | //offset 696 | segmentOffset = ((struct segment_command *)loadCommand)->fileoff; 697 | 698 | //size 699 | segmentSize = ((struct segment_command *)loadCommand)->filesize; 700 | 701 | } 702 | //64bit 703 | // ->get offset/size of segment 704 | else if(sizeof(struct mach_header_64) == [machoHeader[KEY_HEADER_SIZE] integerValue]) 705 | { 706 | //offset 707 | segmentOffset = ((struct segment_command_64 *)loadCommand)->fileoff; 708 | 709 | //size 710 | segmentSize = ((struct segment_command_64 *)loadCommand)->filesize; 711 | } 712 | 713 | //calc entropy 714 | // ->does entire segment... 715 | segmentEntropy = [self calcEntropy:&fileBytes[segmentOffset] length:segmentSize]; 716 | 717 | //dbg msg 718 | //NSLog(@"%s's entropy: %f", ((struct segment_command *)loadCommand)->segname, segmentEntropy); 719 | 720 | //TODO: test more! 721 | if(segmentEntropy > 7.2f) 722 | { 723 | //inc total 724 | totalCompressedData += segmentSize; 725 | } 726 | 727 | }//all load commands 728 | 729 | //dbg msg 730 | //NSLog(@"final calc: %f\n", (1.0 * totalCompressedData)/fileData.length); 731 | 732 | //final calculation for architecture 733 | if( ((1.0 * totalCompressedData)/fileData.length) > .2) 734 | { 735 | //set 736 | packed = YES; 737 | 738 | //bail 739 | // ->its packed 740 | goto bail; 741 | 742 | } 743 | 744 | }//for all macho headers (e.g. fat file) 745 | 746 | //bail 747 | bail: 748 | 749 | return packed; 750 | } 751 | 752 | //based on https://github.com/erocarrera/pefile/blob/master/pefile.py 753 | -(float)calcEntropy:(char*)data length:(NSUInteger)length 754 | { 755 | //entropy 756 | float entropy = 0.0f; 757 | 758 | //occurances array 759 | unsigned int occurrences[256] = {0}; 760 | 761 | //intermediate var 762 | float pX = 0.0f; 763 | 764 | //sanity check 765 | if(0 == length) 766 | { 767 | //bail 768 | goto bail; 769 | } 770 | 771 | //count all occurances 772 | for(NSUInteger i = 0; iis a little tricky due to offsets and lengths of strings (null paddings, etc) 803 | -(NSString*)extractPath:(struct load_command *)loadCommand byteOrder:(NSNumber*)byteOrder 804 | { 805 | //offset 806 | size_t pathOffset = 0; 807 | 808 | //path bytes 809 | char* pathBytes = NULL; 810 | 811 | //length of path 812 | size_t pathLength = 0; 813 | 814 | //path 815 | NSString* path = nil; 816 | 817 | //set path offset 818 | // ->different based on load command type 819 | switch(loadCommand->cmd) 820 | { 821 | //LC_RPATHs 822 | case LC_RPATH: 823 | 824 | //set offset 825 | pathOffset = sizeof(struct rpath_command); 826 | 827 | break; 828 | 829 | //LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_REEXPORT_DYLIBS 830 | case LC_LOAD_DYLIB: 831 | case LC_REEXPORT_DYLIB: 832 | case LC_LOAD_WEAK_DYLIB: 833 | 834 | //set offset 835 | pathOffset = sizeof(struct dylib_command); 836 | 837 | break; 838 | 839 | default: 840 | break; 841 | } 842 | 843 | //init pointer to path's bytes 844 | pathBytes = (char*)loadCommand + pathOffset; 845 | 846 | //set path's length 847 | // ->min of strlen/value calculated from load command size 848 | pathLength = MIN(strlen(pathBytes), (loadCommand->cmdsize - pathOffset)); 849 | 850 | //create nstring version of path 851 | path = [[NSString alloc] initWithBytes:pathBytes length:pathLength encoding:NSUTF8StringEncoding]; 852 | 853 | return path; 854 | } 855 | 856 | 857 | @end 858 | -------------------------------------------------------------------------------- /MachOParser/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // MachOParser 4 | // 5 | // Created by Patrick Wardle on 2/10/15. 6 | // Copyright (c) 2015 Patrick Wardle. All rights reserved. 7 | // 8 | 9 | #import "MachO.h" 10 | 11 | #import 12 | 13 | //TODO: packer checks, import count? etc? 14 | // ->/Library/Application\ Support/Adobe/Plug-Ins/CC/File\ Formats/Camera\ Raw.plugin/Contents/MacOS/Camera\ Raw ...isn't really packed, but has high entropy 15 | 16 | int main(int argc, const char * argv[]) 17 | { 18 | @autoreleasepool 19 | { 20 | //machO parser 21 | MachO* parser = nil; 22 | 23 | //alloc/init 24 | parser = [[MachO alloc] init]; 25 | 26 | //parse a file 27 | [parser parse:[NSString stringWithUTF8String:argv[1]] classify:YES]; 28 | 29 | //dbg 30 | NSLog(@"parsing complete:"); 31 | NSLog(@"%@", parser.binaryInfo); 32 | 33 | /* 34 | NSLog(@"macho headers/load commands: %@", parser.binaryInfo[KEY_MACHO_HEADERS]); 35 | NSLog(@"LC_RPATHs: %@", parser.binaryInfo[KEY_LC_RPATHS]); 36 | NSLog(@"LC_LOAD_DYLIBS: %@", parser.binaryInfo[KEY_LC_LOAD_DYLIBS]); 37 | NSLog(@"LC_LOAD_WEAK_DYLIBS: %@", parser.binaryInfo[KEY_LC_LOAD_WEAK_DYLIBS]); 38 | */ 39 | } 40 | 41 | 42 | return 0; 43 | } 44 | --------------------------------------------------------------------------------