├── LICENSE ├── MetaMorph_ex ├── packages.config ├── App.config ├── Helper.cs ├── Properties │ └── AssemblyInfo.cs ├── MetaMorph_ex.csproj └── Program.cs ├── README.md ├── MetaMorph_ex.sln ├── .gitattributes └── .gitignore /LICENSE: -------------------------------------------------------------------------------- 1 | lolcode license 2 | -------------------------------------------------------------------------------- /MetaMorph_ex/packages.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /MetaMorph_ex/App.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # dnlib-Metamorphic-code-exemple 2 | Using dnlib to make Metmorphic code in C# 3 | 4 | ## How does it work ? 5 | It uses ![dnlib](https://github.com/0xd4d/dnlib) to edit a file's byte and run it on memory. 6 | 7 | ## How to 8 | 1. Create "go.txt" in file directory 9 | 2. Start the app and see it slowly devouring emptyness of our dark universe 10 | 3. When you want to stop it, remove "go.txt" from folder. 11 | 12 | ## Disclaimer 13 | C# being an interpreted language and not a compiled language makes true polymorphism impossible. Just4Fun. 14 | -------------------------------------------------------------------------------- /MetaMorph_ex/Helper.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | 4 | namespace MetaMorph_ex 5 | { 6 | public class Helper 7 | { 8 | /// 9 | /// Return a random aschii char 10 | /// 11 | /// 12 | public static string GenerateString(int index) 13 | { 14 | Random rnd = new Random(); 15 | string txtRand = string.Empty; 16 | for (int i = 0; i < index; i++) txtRand += ((char)rnd.Next(int.MinValue, int.MaxValue - 20)).ToString(); 17 | return txtRand; 18 | } 19 | public static string RandomAZString(int length) 20 | { 21 | Random rnd = new Random(); 22 | const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 23 | return new string(Enumerable.Repeat(chars, length) 24 | .Select(s => s[rnd.Next(s.Length)]).ToArray()).ToLower(); 25 | } 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /MetaMorph_ex.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 14 4 | VisualStudioVersion = 14.0.25420.1 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MetaMorph_ex", "MetaMorph_ex\MetaMorph_ex.csproj", "{262D0AAC-2591-4BC3-9B5D-E56E5798C24D}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {262D0AAC-2591-4BC3-9B5D-E56E5798C24D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {262D0AAC-2591-4BC3-9B5D-E56E5798C24D}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {262D0AAC-2591-4BC3-9B5D-E56E5798C24D}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {262D0AAC-2591-4BC3-9B5D-E56E5798C24D}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | EndGlobal 23 | -------------------------------------------------------------------------------- /MetaMorph_ex/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | using System.Runtime.InteropServices; 4 | 5 | // Les informations générales relatives à un assembly dépendent de 6 | // l'ensemble d'attributs suivant. Changez les valeurs de ces attributs pour modifier les informations 7 | // associées à un assembly. 8 | [assembly: AssemblyTitle("MetaMorph_ex")] 9 | [assembly: AssemblyDescription("")] 10 | [assembly: AssemblyConfiguration("")] 11 | [assembly: AssemblyCompany("")] 12 | [assembly: AssemblyProduct("MetaMorph_ex")] 13 | [assembly: AssemblyCopyright("none")] 14 | [assembly: AssemblyTrademark("")] 15 | [assembly: AssemblyCulture("")] 16 | 17 | // L'affectation de la valeur false à ComVisible rend les types invisibles dans cet assembly 18 | // aux composants COM. Si vous devez accéder à un type dans cet assembly à partir de 19 | // COM, affectez la valeur true à l'attribut ComVisible sur ce type. 20 | [assembly: ComVisible(false)] 21 | 22 | // Le GUID suivant est pour l'ID de la typelib si ce projet est exposé à COM 23 | [assembly: Guid("262d0aac-2591-4bc3-9b5d-e56e5798c24d")] 24 | 25 | // Les informations de version pour un assembly se composent des quatre valeurs suivantes : 26 | // 27 | // Version principale 28 | // Version secondaire 29 | // Numéro de build 30 | // Révision 31 | // 32 | // Vous pouvez spécifier toutes les valeurs ou indiquer les numéros de build et de révision par défaut 33 | // en utilisant '*', comme indiqué ci-dessous : 34 | // [assembly: AssemblyVersion("1.0.*")] 35 | [assembly: AssemblyVersion("1.0.0.0")] 36 | [assembly: AssemblyFileVersion("1.0.0.0")] 37 | -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). Diff markers may cause the following 21 | # file extensions to fail to load in VS. An alternative would be to treat 22 | # these files as binary and thus will always conflict and require user 23 | # intervention with every merge. To do so, just uncomment the entries below 24 | ############################################################################### 25 | #*.sln merge=binary 26 | #*.csproj merge=binary 27 | #*.vbproj merge=binary 28 | #*.vcxproj merge=binary 29 | #*.vcproj merge=binary 30 | #*.dbproj merge=binary 31 | #*.fsproj merge=binary 32 | #*.lsproj merge=binary 33 | #*.wixproj merge=binary 34 | #*.modelproj merge=binary 35 | #*.sqlproj merge=binary 36 | #*.wwaproj merge=binary 37 | 38 | ############################################################################### 39 | # behavior for image files 40 | # 41 | # image files are treated as binary by default. 42 | ############################################################################### 43 | #*.jpg binary 44 | #*.png binary 45 | #*.gif binary 46 | 47 | ############################################################################### 48 | # diff behavior for common document formats 49 | # 50 | # Convert binary document formats to text before diffing them. This feature 51 | # is only available from the command line. Turn it on by uncommenting the 52 | # entries below. 53 | ############################################################################### 54 | #*.doc diff=astextplain 55 | #*.DOC diff=astextplain 56 | #*.docx diff=astextplain 57 | #*.DOCX diff=astextplain 58 | #*.dot diff=astextplain 59 | #*.DOT diff=astextplain 60 | #*.pdf diff=astextplain 61 | #*.PDF diff=astextplain 62 | #*.rtf diff=astextplain 63 | #*.RTF diff=astextplain 64 | -------------------------------------------------------------------------------- /MetaMorph_ex/MetaMorph_ex.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Debug 6 | AnyCPU 7 | {262D0AAC-2591-4BC3-9B5D-E56E5798C24D} 8 | Exe 9 | Properties 10 | MetaMorph_ex 11 | MetaMorph_ex 12 | v3.5 13 | 512 14 | true 15 | 16 | 17 | 18 | AnyCPU 19 | true 20 | full 21 | false 22 | bin\Debug\ 23 | DEBUG;TRACE 24 | prompt 25 | 4 26 | 27 | 28 | AnyCPU 29 | pdbonly 30 | true 31 | bin\Release\ 32 | TRACE 33 | prompt 34 | 4 35 | 36 | 37 | 38 | ..\packages\dnlib.1.6.1\lib\dnlib.dll 39 | True 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 65 | -------------------------------------------------------------------------------- /MetaMorph_ex/Program.cs: -------------------------------------------------------------------------------- 1 | using dnlib.DotNet; 2 | using System; 3 | using System.Diagnostics; 4 | using System.IO; 5 | 6 | namespace MetaMorph_ex 7 | { 8 | class Program 9 | { 10 | /// 11 | /// the flag which will be changed 12 | /// 13 | public static string flag = "1337"; 14 | /// 15 | /// 16 | /// a .NET file representation 17 | /// 18 | public static ModuleDefMD file_module; 19 | /// 20 | /// Pure Byte array of current file 21 | /// 22 | public static byte[] file_bytes; 23 | /// 24 | /// Absolute path of current file 25 | /// 26 | public static string me; 27 | /// 28 | /// A new instance of Random 29 | /// 30 | public static Random rnd; 31 | /// 32 | /// Program Entry Point 33 | /// 34 | /// 35 | static void Main(string[] args) 36 | { 37 | //because we may want to avoid zombie process 0:) 38 | if (!File.Exists("go.txt")) Environment.Exit(0); 39 | //First we read this file bytes 40 | readcode(); 41 | //Second we edit Flag value 42 | replaceflag(); 43 | //Finally we save new file 44 | writebyte(); 45 | //Just an excuse to use changed code at runtime ;) 46 | Console.WriteLine(flag); 47 | } 48 | /// 49 | /// Method to grab current file bytes / module 50 | /// 51 | static void readcode() 52 | { 53 | //get current file absolute path 54 | me = (Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase) + "\\" + AppDomain.CurrentDomain.FriendlyName).Replace(".vshost", "").Replace("file:\\", ""); 55 | //get bytes from absolute path 56 | file_bytes = File.ReadAllBytes(me); 57 | //create a new moduledef using these bytes 58 | file_module = ModuleDefMD.Load(file_bytes); 59 | } 60 | /// 61 | /// Method to change Flag value 62 | /// 63 | static void replaceflag() 64 | { 65 | //get MetaMorph_ex.Program method constructor 66 | MethodDef method = file_module.ResolveMethod(6); 67 | //declare a new instance of random 68 | rnd = new Random(); 69 | //change flag value in module 70 | method.Body.Instructions[0].Operand = Helper.GenerateString(rnd.Next(0, 20)); 71 | } 72 | 73 | /// 74 | /// Method to save module 75 | /// 76 | static void writebyte() 77 | { 78 | //declare a new instance of random 79 | rnd = new Random(); 80 | //get new file name 81 | me = Helper.RandomAZString(rnd.Next(0, 20)) + ".exe"; 82 | //save module file 83 | file_module.Write(me); 84 | //start created self modifying assembly 85 | Process.Start(me); 86 | //die 87 | Environment.Exit(0); 88 | } 89 | } 90 | } -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.userosscache 8 | *.sln.docstates 9 | 10 | # User-specific files (MonoDevelop/Xamarin Studio) 11 | *.userprefs 12 | 13 | # Build results 14 | [Dd]ebug/ 15 | [Dd]ebugPublic/ 16 | [Rr]elease/ 17 | [Rr]eleases/ 18 | [Xx]64/ 19 | [Xx]86/ 20 | [Bb]uild/ 21 | bld/ 22 | [Bb]in/ 23 | [Oo]bj/ 24 | 25 | # Visual Studio 2015 cache/options directory 26 | .vs/ 27 | # Uncomment if you have tasks that create the project's static files in wwwroot 28 | #wwwroot/ 29 | 30 | # MSTest test Results 31 | [Tt]est[Rr]esult*/ 32 | [Bb]uild[Ll]og.* 33 | 34 | # NUNIT 35 | *.VisualState.xml 36 | TestResult.xml 37 | 38 | # Build Results of an ATL Project 39 | [Dd]ebugPS/ 40 | [Rr]eleasePS/ 41 | dlldata.c 42 | 43 | # DNX 44 | project.lock.json 45 | artifacts/ 46 | 47 | *_i.c 48 | *_p.c 49 | *_i.h 50 | *.ilk 51 | *.meta 52 | *.obj 53 | *.pch 54 | *.pdb 55 | *.pgc 56 | *.pgd 57 | *.rsp 58 | *.sbr 59 | *.tlb 60 | *.tli 61 | *.tlh 62 | *.tmp 63 | *.tmp_proj 64 | *.log 65 | *.vspscc 66 | *.vssscc 67 | .builds 68 | *.pidb 69 | *.svclog 70 | *.scc 71 | 72 | # Chutzpah Test files 73 | _Chutzpah* 74 | 75 | # Visual C++ cache files 76 | ipch/ 77 | *.aps 78 | *.ncb 79 | *.opendb 80 | *.opensdf 81 | *.sdf 82 | *.cachefile 83 | *.VC.db 84 | 85 | # Visual Studio profiler 86 | *.psess 87 | *.vsp 88 | *.vspx 89 | *.sap 90 | 91 | # TFS 2012 Local Workspace 92 | $tf/ 93 | 94 | # Guidance Automation Toolkit 95 | *.gpState 96 | 97 | # ReSharper is a .NET coding add-in 98 | _ReSharper*/ 99 | *.[Rr]e[Ss]harper 100 | *.DotSettings.user 101 | 102 | # JustCode is a .NET coding add-in 103 | .JustCode 104 | 105 | # TeamCity is a build add-in 106 | _TeamCity* 107 | 108 | # DotCover is a Code Coverage Tool 109 | *.dotCover 110 | 111 | # NCrunch 112 | _NCrunch_* 113 | .*crunch*.local.xml 114 | nCrunchTemp_* 115 | 116 | # MightyMoose 117 | *.mm.* 118 | AutoTest.Net/ 119 | 120 | # Web workbench (sass) 121 | .sass-cache/ 122 | 123 | # Installshield output folder 124 | [Ee]xpress/ 125 | 126 | # DocProject is a documentation generator add-in 127 | DocProject/buildhelp/ 128 | DocProject/Help/*.HxT 129 | DocProject/Help/*.HxC 130 | DocProject/Help/*.hhc 131 | DocProject/Help/*.hhk 132 | DocProject/Help/*.hhp 133 | DocProject/Help/Html2 134 | DocProject/Help/html 135 | 136 | # Click-Once directory 137 | publish/ 138 | 139 | # Publish Web Output 140 | *.[Pp]ublish.xml 141 | *.azurePubxml 142 | 143 | # TODO: Un-comment the next line if you do not want to checkin 144 | # your web deploy settings because they may include unencrypted 145 | # passwords 146 | #*.pubxml 147 | *.publishproj 148 | 149 | # NuGet Packages 150 | *.nupkg 151 | # The packages folder can be ignored because of Package Restore 152 | **/packages/* 153 | # except build/, which is used as an MSBuild target. 154 | !**/packages/build/ 155 | # Uncomment if necessary however generally it will be regenerated when needed 156 | #!**/packages/repositories.config 157 | # NuGet v3's project.json files produces more ignoreable files 158 | *.nuget.props 159 | *.nuget.targets 160 | 161 | # Microsoft Azure Build Output 162 | csx/ 163 | *.build.csdef 164 | 165 | # Microsoft Azure Emulator 166 | ecf/ 167 | rcf/ 168 | 169 | # Windows Store app package directory 170 | AppPackages/ 171 | BundleArtifacts/ 172 | 173 | # Visual Studio cache files 174 | # files ending in .cache can be ignored 175 | *.[Cc]ache 176 | # but keep track of directories ending in .cache 177 | !*.[Cc]ache/ 178 | 179 | # Others 180 | ClientBin/ 181 | [Ss]tyle[Cc]op.* 182 | ~$* 183 | *~ 184 | *.dbmdl 185 | *.dbproj.schemaview 186 | *.pfx 187 | *.publishsettings 188 | node_modules/ 189 | orleans.codegen.cs 190 | 191 | # RIA/Silverlight projects 192 | Generated_Code/ 193 | 194 | # Backup & report files from converting an old project file 195 | # to a newer Visual Studio version. Backup files are not needed, 196 | # because we have git ;-) 197 | _UpgradeReport_Files/ 198 | Backup*/ 199 | UpgradeLog*.XML 200 | UpgradeLog*.htm 201 | 202 | # SQL Server files 203 | *.mdf 204 | *.ldf 205 | 206 | # Business Intelligence projects 207 | *.rdl.data 208 | *.bim.layout 209 | *.bim_*.settings 210 | 211 | # Microsoft Fakes 212 | FakesAssemblies/ 213 | 214 | # GhostDoc plugin setting file 215 | *.GhostDoc.xml 216 | 217 | # Node.js Tools for Visual Studio 218 | .ntvs_analysis.dat 219 | 220 | # Visual Studio 6 build log 221 | *.plg 222 | 223 | # Visual Studio 6 workspace options file 224 | *.opt 225 | 226 | # Visual Studio LightSwitch build output 227 | **/*.HTMLClient/GeneratedArtifacts 228 | **/*.DesktopClient/GeneratedArtifacts 229 | **/*.DesktopClient/ModelManifest.xml 230 | **/*.Server/GeneratedArtifacts 231 | **/*.Server/ModelManifest.xml 232 | _Pvt_Extensions 233 | 234 | # LightSwitch generated files 235 | GeneratedArtifacts/ 236 | ModelManifest.xml 237 | 238 | # Paket dependency manager 239 | .paket/paket.exe 240 | 241 | # FAKE - F# Make 242 | .fake/ 243 | --------------------------------------------------------------------------------