├── .gitattributes ├── AMSITrigger ├── packages.config ├── App.config ├── AmsiTrigger.csproj.user ├── Properties │ └── AssemblyInfo.cs ├── AmsiTrigger.csproj ├── Program.cs └── Triggers.cs ├── README.md ├── AmsiTrigger.sln ├── .gitignore └── LICENSE /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /AMSITrigger/packages.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /AMSITrigger/App.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | -------------------------------------------------------------------------------- /AMSITrigger/AmsiTrigger.csproj.user: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -i=c:\test.txt -m=1024 -debug bla -f=2 5 | 6 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # AMSITrigger v3 2 | ## Hunting for Malicious Strings 3 | 4 | ### Usage: 5 | 6 | -i, -inputfile=VALUE Powershell filename 7 | -u, -url=VALUE URL eg. https://10.1.1.1/Invoke-NinjaCopy.ps1 8 | -f, -format=VALUE Output Format: 9 | 1 - Only show Triggers 10 | 2 - Show Triggers with Line numbers 11 | 3 - Show Triggers inline with code 12 | 4 - Show AMSI calls (xmas tree mode) 13 | -d, -debug Show Debug Info 14 | -p, -pause=VALUE Pause after displaying VALUE triggers 15 | -m, -maxsiglength=VALUE Maximum signature Length to cater for, 16 | default=2048 17 | -c, -chunksize=VALUE Chunk size to send to AMSIScanBuffer, 18 | default=4096 19 | -h, -?, -help Show Help 20 | 21 | 22 | For details see https://www.rythmstick.net/posts/amsitrigger 23 | 24 | -------------------------------------------------------------------------------- /AmsiTrigger.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 16 4 | VisualStudioVersion = 16.0.29519.87 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AmsiTrigger", "AmsiTrigger\AmsiTrigger.csproj", "{8BAAEFF6-1840-4430-AA05-47F2877E3235}" 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 | {8BAAEFF6-1840-4430-AA05-47F2877E3235}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {8BAAEFF6-1840-4430-AA05-47F2877E3235}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {8BAAEFF6-1840-4430-AA05-47F2877E3235}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {8BAAEFF6-1840-4430-AA05-47F2877E3235}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | GlobalSection(ExtensibilityGlobals) = postSolution 23 | SolutionGuid = {D2BE08C9-EAC0-4B7C-AB68-5FCBDE4EE373} 24 | EndGlobalSection 25 | EndGlobal 26 | -------------------------------------------------------------------------------- /AMSITrigger/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | using System.Runtime.InteropServices; 4 | 5 | // General Information about an assembly is controlled through the following 6 | // set of attributes. Change these attribute values to modify the information 7 | // associated with an assembly. 8 | [assembly: AssemblyTitle("AmsiTrigger")] 9 | [assembly: AssemblyDescription("")] 10 | [assembly: AssemblyConfiguration("")] 11 | [assembly: AssemblyCompany("")] 12 | [assembly: AssemblyProduct("AmsiTrigger")] 13 | [assembly: AssemblyCopyright("Copyright © 2025")] 14 | [assembly: AssemblyTrademark("")] 15 | [assembly: AssemblyCulture("")] 16 | 17 | // Setting ComVisible to false makes the types in this assembly not visible 18 | // to COM components. If you need to access a type in this assembly from 19 | // COM, set the ComVisible attribute to true on that type. 20 | [assembly: ComVisible(false)] 21 | 22 | // The following GUID is for the ID of the typelib if this project is exposed to COM 23 | [assembly: Guid("8baaeff6-1840-4430-aa05-47f2877e3235")] 24 | 25 | // Version information for an assembly consists of the following four values: 26 | // 27 | // Major Version 28 | // Minor Version 29 | // Build Number 30 | // Revision 31 | // 32 | // You can specify all the values or you can default the Build and Revision Numbers 33 | // by using the '*' as shown below: 34 | // [assembly: AssemblyVersion("1.0.*")] 35 | [assembly: AssemblyVersion("1.0.0.0")] 36 | [assembly: AssemblyFileVersion("1.0.0.0")] 37 | -------------------------------------------------------------------------------- /AMSITrigger/AmsiTrigger.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Debug 6 | AnyCPU 7 | {8BAAEFF6-1840-4430-AA05-47F2877E3235} 8 | Exe 9 | AmsiTrigger 10 | AmsiTrigger 11 | v4.8 12 | 512 13 | true 14 | 15 | 16 | 17 | 18 | 19 | x64 20 | true 21 | full 22 | false 23 | bin\Debug\ 24 | DEBUG;TRACE 25 | prompt 26 | 4 27 | 28 | 29 | AnyCPU 30 | pdbonly 31 | true 32 | bin\Release\ 33 | TRACE 34 | prompt 35 | 4 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | Designer 55 | 56 | 57 | 58 | 59 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.rsuser 8 | *.suo 9 | *.user 10 | *.userosscache 11 | *.sln.docstates 12 | 13 | # User-specific files (MonoDevelop/Xamarin Studio) 14 | *.userprefs 15 | 16 | # Build results 17 | [Dd]ebug/ 18 | [Dd]ebugPublic/ 19 | [Rr]elease/ 20 | [Rr]eleases/ 21 | x64/ 22 | x86/ 23 | bld/ 24 | [Bb]in/ 25 | [Oo]bj/ 26 | [Ll]og/ 27 | 28 | # Visual Studio 2015/2017 cache/options directory 29 | .vs/ 30 | # Uncomment if you have tasks that create the project's static files in wwwroot 31 | #wwwroot/ 32 | 33 | # Visual Studio 2017 auto generated files 34 | Generated\ Files/ 35 | 36 | # MSTest test Results 37 | [Tt]est[Rr]esult*/ 38 | [Bb]uild[Ll]og.* 39 | 40 | # NUNIT 41 | *.VisualState.xml 42 | TestResult.xml 43 | 44 | # Build Results of an ATL Project 45 | [Dd]ebugPS/ 46 | [Rr]eleasePS/ 47 | dlldata.c 48 | 49 | # Benchmark Results 50 | BenchmarkDotNet.Artifacts/ 51 | 52 | # .NET Core 53 | project.lock.json 54 | project.fragment.lock.json 55 | artifacts/ 56 | 57 | # StyleCop 58 | StyleCopReport.xml 59 | 60 | # Files built by Visual Studio 61 | *_i.c 62 | *_p.c 63 | *_h.h 64 | *.ilk 65 | *.meta 66 | *.obj 67 | *.iobj 68 | *.pch 69 | *.pdb 70 | *.ipdb 71 | *.pgc 72 | *.pgd 73 | *.rsp 74 | *.sbr 75 | *.tlb 76 | *.tli 77 | *.tlh 78 | *.tmp 79 | *.tmp_proj 80 | *_wpftmp.csproj 81 | *.log 82 | *.vspscc 83 | *.vssscc 84 | .builds 85 | *.pidb 86 | *.svclog 87 | *.scc 88 | 89 | # Chutzpah Test files 90 | _Chutzpah* 91 | 92 | # Visual C++ cache files 93 | ipch/ 94 | *.aps 95 | *.ncb 96 | *.opendb 97 | *.opensdf 98 | *.sdf 99 | *.cachefile 100 | *.VC.db 101 | *.VC.VC.opendb 102 | 103 | # Visual Studio profiler 104 | *.psess 105 | *.vsp 106 | *.vspx 107 | *.sap 108 | 109 | # Visual Studio Trace Files 110 | *.e2e 111 | 112 | # TFS 2012 Local Workspace 113 | $tf/ 114 | 115 | # Guidance Automation Toolkit 116 | *.gpState 117 | 118 | # ReSharper is a .NET coding add-in 119 | _ReSharper*/ 120 | *.[Rr]e[Ss]harper 121 | *.DotSettings.user 122 | 123 | # JustCode is a .NET coding add-in 124 | .JustCode 125 | 126 | # TeamCity is a build add-in 127 | _TeamCity* 128 | 129 | # DotCover is a Code Coverage Tool 130 | *.dotCover 131 | 132 | # AxoCover is a Code Coverage Tool 133 | .axoCover/* 134 | !.axoCover/settings.json 135 | 136 | # Visual Studio code coverage results 137 | *.coverage 138 | *.coveragexml 139 | 140 | # NCrunch 141 | _NCrunch_* 142 | .*crunch*.local.xml 143 | nCrunchTemp_* 144 | 145 | # MightyMoose 146 | *.mm.* 147 | AutoTest.Net/ 148 | 149 | # Web workbench (sass) 150 | .sass-cache/ 151 | 152 | # Installshield output folder 153 | [Ee]xpress/ 154 | 155 | # DocProject is a documentation generator add-in 156 | DocProject/buildhelp/ 157 | DocProject/Help/*.HxT 158 | DocProject/Help/*.HxC 159 | DocProject/Help/*.hhc 160 | DocProject/Help/*.hhk 161 | DocProject/Help/*.hhp 162 | DocProject/Help/Html2 163 | DocProject/Help/html 164 | 165 | # Click-Once directory 166 | publish/ 167 | 168 | # Publish Web Output 169 | *.[Pp]ublish.xml 170 | *.azurePubxml 171 | # Note: Comment the next line if you want to checkin your web deploy settings, 172 | # but database connection strings (with potential passwords) will be unencrypted 173 | *.pubxml 174 | *.publishproj 175 | 176 | # Microsoft Azure Web App publish settings. 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Backup files are not needed, 238 | # because we have git ;-) 239 | _UpgradeReport_Files/ 240 | Backup*/ 241 | UpgradeLog*.XML 242 | UpgradeLog*.htm 243 | ServiceFabricBackup/ 244 | *.rptproj.bak 245 | 246 | # SQL Server files 247 | *.mdf 248 | *.ldf 249 | *.ndf 250 | 251 | # Business Intelligence projects 252 | *.rdl.data 253 | *.bim.layout 254 | *.bim_*.settings 255 | *.rptproj.rsuser 256 | 257 | # Microsoft Fakes 258 | FakesAssemblies/ 259 | 260 | # GhostDoc plugin setting file 261 | *.GhostDoc.xml 262 | 263 | # Node.js Tools for Visual Studio 264 | .ntvs_analysis.dat 265 | node_modules/ 266 | 267 | # Visual Studio 6 build log 268 | *.plg 269 | 270 | # Visual Studio 6 workspace options file 271 | *.opt 272 | 273 | # Visual Studio 6 auto-generated workspace file (contains which files were open etc.) 274 | *.vbw 275 | 276 | # Visual Studio LightSwitch build output 277 | **/*.HTMLClient/GeneratedArtifacts 278 | **/*.DesktopClient/GeneratedArtifacts 279 | **/*.DesktopClient/ModelManifest.xml 280 | **/*.Server/GeneratedArtifacts 281 | **/*.Server/ModelManifest.xml 282 | _Pvt_Extensions 283 | 284 | # Paket dependency manager 285 | .paket/paket.exe 286 | paket-files/ 287 | 288 | # FAKE - F# Make 289 | .fake/ 290 | 291 | # JetBrains Rider 292 | .idea/ 293 | *.sln.iml 294 | 295 | # CodeRush personal settings 296 | .cr/personal 297 | 298 | # Python Tools for Visual Studio (PTVS) 299 | __pycache__/ 300 | *.pyc 301 | 302 | # Cake - Uncomment if you are using it 303 | # tools/** 304 | # !tools/packages.config 305 | 306 | # Tabs Studio 307 | *.tss 308 | 309 | # Telerik's JustMock configuration file 310 | *.jmconfig 311 | 312 | # BizTalk build output 313 | *.btp.cs 314 | *.btm.cs 315 | *.odx.cs 316 | *.xsd.cs 317 | 318 | # OpenCover UI analysis results 319 | OpenCover/ 320 | 321 | # Azure Stream Analytics local run output 322 | ASALocalRun/ 323 | 324 | # MSBuild Binary and Structured Log 325 | *.binlog 326 | 327 | # NVidia Nsight GPU debugger configuration file 328 | *.nvuser 329 | 330 | # MFractors (Xamarin productivity tool) working folder 331 | .mfractor/ 332 | 333 | # Local History for Visual Studio 334 | .localhistory/ 335 | -------------------------------------------------------------------------------- /AMSITrigger/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Runtime.InteropServices; 3 | using System.IO; 4 | using System.Diagnostics.Eventing.Reader; 5 | 6 | namespace AmsiTrigger 7 | { 8 | 9 | using static Globals; 10 | 11 | public static class Globals 12 | { 13 | public static int minSignatureLength = 6; // Playing with these can result in quicker execution time and less AMSIScanBuffer calls. It can also reduce the accuracy of trigger identification. 14 | public static int maxSignatureLength = 2048; // Setting maxSignatureLength will ensure that signatures split over data chunks dont get missed as only the first (chunkSize - maxSignatureLength) will be reported as clean 15 | public static int format = 1; 16 | public static int chunkSize = 4096; 17 | public static int max = 0; 18 | public static int pauseOutput = 0; 19 | public static Boolean help = false; 20 | public static Boolean debug = false; 21 | public static string inScript; 22 | public static IntPtr amsiContext; 23 | public static string inURL; 24 | public static int lineNumber = 1; 25 | public static int sampleIndex = 0; 26 | public static int amsiCalls = 0; 27 | public static int chunksProcessed = 0; 28 | public static int triggersFound = 0; 29 | } 30 | 31 | 32 | 33 | 34 | class Program 35 | { 36 | 37 | [DllImport("Amsi.dll", EntryPoint = "AmsiInitialize", CallingConvention = CallingConvention.StdCall)] 38 | public static extern int AmsiInitialize([MarshalAs(UnmanagedType.LPWStr)]string appName, out IntPtr amsiContext); 39 | [DllImport("Amsi.dll", EntryPoint = "AmsiUninitialize", CallingConvention = CallingConvention.StdCall)] 40 | public static extern void AmsiUninitialize(IntPtr amsiContext); 41 | 42 | 43 | 44 | 45 | static void Main(string[] args) 46 | { 47 | 48 | string infile = string.Empty; 49 | 50 | 51 | var watch = System.Diagnostics.Stopwatch.StartNew(); 52 | 53 | 54 | if (!validParameters(args)) 55 | { 56 | return; 57 | } 58 | 59 | if (!AmsiInitialize()) 60 | { 61 | return; 62 | } 63 | 64 | Triggers.FindTriggers(); 65 | 66 | AmsiUninitialize(amsiContext); 67 | 68 | watch.Stop(); 69 | 70 | if (debug) 71 | { 72 | Console.ForegroundColor = System.ConsoleColor.Gray; 73 | Console.WriteLine($"\n\r\n\rChunks Processed: {chunksProcessed}"); 74 | Console.WriteLine($"Triggers Found: {triggersFound}"); 75 | Console.WriteLine($"AmsiScanBuffer Calls: {amsiCalls}"); 76 | Console.WriteLine($"Total Execution Time: {watch.Elapsed.TotalSeconds} s"); 77 | } 78 | 79 | } 80 | 81 | 82 | 83 | public static Boolean validParameters(string[] args) 84 | { 85 | string allArgs = System.Environment.CommandLine.Substring(System.Environment.CommandLine.IndexOf(" ") + 1); 86 | 87 | foreach (string fullarg in args) 88 | { 89 | 90 | if (fullarg == "-debug" || fullarg == "-d") 91 | { 92 | debug = true; 93 | allArgs = allArgs.Replace(fullarg, ""); 94 | } 95 | else if (fullarg == "-h" || fullarg == "-help" || fullarg == "-?") 96 | { 97 | showHelp(); 98 | return false; 99 | } 100 | else if (fullarg.IndexOf("=")==-1) 101 | { 102 | Console.WriteLine("[-] Parameter Error:"+allArgs); 103 | return false; 104 | } 105 | else 106 | { 107 | 108 | string param = fullarg.Substring(0, fullarg.IndexOf("=")); 109 | switch (param) 110 | { 111 | case ("-i"): 112 | case ("-inputfile"): 113 | inScript = fullarg.Substring(fullarg.IndexOf("=") + 1); 114 | allArgs = allArgs.Replace(fullarg, ""); 115 | break; 116 | 117 | case ("-u"): 118 | case ("-url"): 119 | inURL = fullarg.Substring(fullarg.IndexOf("=") + 1); 120 | allArgs = allArgs.Replace(fullarg, ""); 121 | break; 122 | 123 | case ("-f"): 124 | case ("-format"): 125 | format = Int32.Parse((fullarg.Substring(fullarg.IndexOf("=") + 1))); 126 | allArgs = allArgs.Replace(fullarg, ""); 127 | break; 128 | 129 | case ("-m"): 130 | case ("-maxsiglength"): 131 | maxSignatureLength = Int32.Parse((fullarg.Substring(fullarg.IndexOf("=") + 1))); 132 | allArgs = allArgs.Replace(fullarg, ""); 133 | break; 134 | 135 | case ("-p"): 136 | case ("-pause"): 137 | pauseOutput = Int32.Parse((fullarg.Substring(fullarg.IndexOf("=") + 1))); 138 | allArgs = allArgs.Replace(fullarg, ""); 139 | break; 140 | 141 | case ("-c"): 142 | case ("-chunksize"): 143 | chunkSize = Int32.Parse((fullarg.Substring(fullarg.IndexOf("=") + 1))); 144 | allArgs = allArgs.Replace(fullarg, ""); 145 | break; 146 | 147 | case ("-h"): 148 | case ("-help"): 149 | showHelp(); 150 | break; 151 | 152 | default: 153 | showHelp(); 154 | break; 155 | } 156 | } 157 | } 158 | 159 | if (inScript!=null && inURL!= null) 160 | { 161 | Console.WriteLine("[-] Supply either -i or -u, not both"); 162 | return false; 163 | } 164 | if (format < 1 || format > 4) 165 | { 166 | Console.WriteLine("[-] Format should be 1-4"); 167 | return false; 168 | } 169 | if (inURL != null && inURL.ToLower().Substring(0, 7) != "http://" && inURL.ToLower().Substring(0, 8) != "https://") 170 | { 171 | Console.WriteLine("[+] Invalid URL - must begin with http:// or https://"); 172 | return false; 173 | } 174 | 175 | if (chunkSize < maxSignatureLength) 176 | { 177 | Console.WriteLine("[+] chunksize should always be > maxSignatureLength"); 178 | return false; 179 | } 180 | 181 | 182 | if (inScript != null && !File.Exists(inScript)) 183 | { 184 | Console.WriteLine("[+] File not found"); 185 | return false; 186 | } 187 | 188 | return true; 189 | } 190 | 191 | 192 | public static void showHelp() 193 | { 194 | 195 | Console.WriteLine(@" _ __ __ ____ ___ _____ _"); 196 | Console.WriteLine(@" / \ | \/ / ___|_ _|_ _| __(_) __ _ __ _ ___ _ __ "); 197 | Console.WriteLine(@" / _ \ | |\/| \___ \| | | || '__| |/ _` |/ _` |/ _ \ '__|"); 198 | Console.WriteLine(@" / ___ \| | | |___) | | | || | | | (_| | (_| | __/ | "); 199 | Console.WriteLine(@" /_/ \_\_| |_|____/___| |_||_| |_|\__, |\__, |\___|_| "); 200 | Console.WriteLine(@" |___/ |___/ v4"); 201 | Console.WriteLine("@_RythmStick\n\n"); 202 | 203 | 204 | Console.WriteLine("Show triggers in Powershell file or URL.\nUsage:"); 205 | 206 | Console.WriteLine("-i|-inputfile= : Powershell filename or"); 207 | Console.WriteLine("-u|-url= : URL eg. https://10.1.1.1/Invoke-NinjaCopy.ps1"); 208 | Console.WriteLine("\n-f|-format= : Output Format:" + "\n\t1 - Only show Triggers\n\t2 - Show Triggers with line numbers\n\t3 - Show Triggers inline with code\n\t4 - Show AMSI calls (xmas tree mode)"); 209 | Console.WriteLine("-d|-debug : Show debug info"); 210 | Console.WriteLine("-m|-maxsiglength= : Maximum Signature Length to cater for, default=2048"); 211 | Console.WriteLine("-c|-chunksize= : Chunk size to send to AMSIScanBuffer, default=4096"); 212 | Console.WriteLine("-p|-pause= : Number of triggers which will pause execution"); 213 | Console.WriteLine("-h|-?|-help : Show Help"); 214 | 215 | 216 | } 217 | 218 | 219 | public static Boolean AmsiInitialize() 220 | { 221 | 222 | int returnValue = AmsiInitialize(@"PowerShell_C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe_10.0.18362.1", out amsiContext); 223 | if (returnValue==0) 224 | { 225 | return true; 226 | } 227 | return false; 228 | } 229 | 230 | } 231 | } 232 | 233 | 234 | -------------------------------------------------------------------------------- /AMSITrigger/Triggers.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | using System.Net; 4 | using System.Runtime.InteropServices; 5 | using System.Text; 6 | using System.Text.RegularExpressions; 7 | 8 | namespace AmsiTrigger 9 | { 10 | 11 | using static Globals; 12 | public class Triggers 13 | { 14 | [DllImport("Amsi.dll", EntryPoint = "AmsiScanBuffer", CallingConvention = CallingConvention.StdCall)] 15 | private static extern int AmsiScanBuffer(IntPtr amsiContext, byte[] buffer, uint length, string contentName, IntPtr session, out AMSI_RESULT result); 16 | 17 | private enum AMSI_RESULT 18 | { 19 | AMSI_RESULT_CLEAN = 0, 20 | AMSI_RESULT_NOT_DETECTED = 1, 21 | AMSI_RESULT_DETECTED = 32768 22 | } 23 | 24 | private static byte[] bigSample; 25 | private static byte[] chunkSample; 26 | private static int triggerStart = 0; 27 | private static int triggerEnd; 28 | private static int startIndex = 0; 29 | public static void FindTriggers() 30 | { 31 | AMSI_RESULT result; 32 | 33 | if (!protectionEnabled(amsiContext)) 34 | { 35 | return; 36 | } 37 | 38 | 39 | if (inScript != null) 40 | { 41 | bigSample = File.ReadAllBytes(inScript); 42 | } 43 | else 44 | { 45 | try 46 | { 47 | WebClient client = new WebClient(); 48 | client.Proxy = WebRequest.GetSystemWebProxy(); 49 | client.Proxy.Credentials = CredentialCache.DefaultCredentials; 50 | ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls | (SecurityProtocolType)768 | (SecurityProtocolType)3072; 51 | bigSample = client.DownloadData(inURL); 52 | } 53 | catch (Exception e) 54 | { 55 | Console.Error.WriteLine(e.Message); 56 | return; 57 | } 58 | 59 | } 60 | 61 | 62 | result = scanBuffer(bigSample, amsiContext); 63 | if (result != AMSI_RESULT.AMSI_RESULT_DETECTED) 64 | { 65 | Console.WriteLine(string.Format("[+] {0}", result)); 66 | return; 67 | } 68 | 69 | 70 | 71 | 72 | while (startIndex + AmsiTrigger.Globals.chunkSize < bigSample.Length) 73 | { 74 | chunkSample = new byte[AmsiTrigger.Globals.chunkSize]; 75 | Array.Copy(bigSample, startIndex, chunkSample, 0, AmsiTrigger.Globals.chunkSize); 76 | processChunk(chunkSample); 77 | } 78 | 79 | 80 | while (startIndex < bigSample.Length) 81 | { 82 | chunkSample = new byte[bigSample.Length - startIndex]; 83 | Array.Copy(bigSample, startIndex, chunkSample, 0, chunkSample.Length); 84 | processChunk(chunkSample); 85 | } 86 | } 87 | 88 | 89 | 90 | 91 | private static void processChunk(byte[] chunkSample ) 92 | { 93 | AMSI_RESULT result; 94 | 95 | chunksProcessed++; 96 | 97 | result = scanBuffer(chunkSample, amsiContext); 98 | 99 | 100 | if (result != AMSI_RESULT.AMSI_RESULT_DETECTED) 101 | { 102 | if (chunkSample.Length > maxSignatureLength) 103 | { 104 | showText(chunkSample, 0, AmsiTrigger.Globals.chunkSize - maxSignatureLength, false); 105 | startIndex += AmsiTrigger.Globals.chunkSize - maxSignatureLength; 106 | } else 107 | { 108 | showText(chunkSample, 0, chunkSample.Length, false); 109 | startIndex+=chunkSample.Length; 110 | } 111 | 112 | return; 113 | } 114 | triggerEnd = findTriggerEnd() + 1; 115 | triggerStart = findTriggerStart(triggerEnd); 116 | 117 | 118 | triggersFound++; 119 | 120 | showText(chunkSample, 0, triggerStart, false); 121 | showText(chunkSample, triggerStart, triggerEnd-triggerStart, true); 122 | 123 | if (pauseOutput > 0) 124 | { 125 | Math.DivRem(triggersFound, pauseOutput, out int remainder); 126 | if (remainder == 0) 127 | { 128 | Console.ForegroundColor = System.ConsoleColor.Gray; 129 | Console.WriteLine("\nPress any key to continue..."); 130 | Console.ReadKey(); 131 | } 132 | } 133 | 134 | startIndex += triggerEnd; 135 | return; 136 | 137 | } 138 | 139 | private static int findTriggerEnd() 140 | { 141 | 142 | AMSI_RESULT result; 143 | byte[] tmpSample; 144 | int lastBytes; 145 | 146 | for (int sampleIndex = 2; sampleIndex < chunkSample.Length + minSignatureLength; sampleIndex += minSignatureLength) 147 | { 148 | if (sampleIndex> chunkSample.Length) { 149 | sampleIndex = chunkSample.Length; 150 | } 151 | tmpSample = new byte[sampleIndex]; 152 | Array.Copy(chunkSample, 0, tmpSample, 0, sampleIndex); 153 | result = scanBuffer(tmpSample, amsiContext); 154 | 155 | 156 | 157 | 158 | if (result == AMSI_RESULT.AMSI_RESULT_DETECTED) 159 | { 160 | 161 | for (lastBytes = 0; lastBytes < minSignatureLength; lastBytes++) 162 | { 163 | 164 | tmpSample = new byte[sampleIndex - lastBytes]; 165 | Array.Copy(chunkSample, 0, tmpSample, 0, sampleIndex - lastBytes); 166 | result = scanBuffer(tmpSample, amsiContext); 167 | if (result != AMSI_RESULT.AMSI_RESULT_DETECTED) 168 | { 169 | return sampleIndex - lastBytes; 170 | } 171 | } 172 | return sampleIndex - lastBytes; 173 | } 174 | } 175 | return 0; 176 | } 177 | 178 | 179 | 180 | 181 | 182 | 183 | private static int findTriggerStart(int triggerEnd) 184 | { 185 | AMSI_RESULT result; 186 | byte[] tmpSample; 187 | 188 | for (int sampleIndex = triggerEnd-1; sampleIndex > 0; sampleIndex--) 189 | { 190 | 191 | tmpSample = new byte[triggerEnd-sampleIndex]; 192 | Array.Copy(chunkSample, sampleIndex, tmpSample, 0, triggerEnd - sampleIndex); 193 | string ssstring = Encoding.Default.GetString(tmpSample); 194 | result = scanBuffer(tmpSample, amsiContext); 195 | 196 | if (result == AMSI_RESULT.AMSI_RESULT_DETECTED) 197 | { 198 | 199 | return sampleIndex; 200 | } 201 | 202 | } 203 | 204 | return 0; 205 | } 206 | 207 | 208 | private static void showText(byte[] output, int start, int length, Boolean highLight) 209 | { 210 | 211 | byte[] tmpSample = new byte[length]; 212 | Array.Copy(output, start, tmpSample, 0, length); 213 | 214 | 215 | switch (format) 216 | { 217 | 218 | 219 | case 1: 220 | if (highLight) 221 | { 222 | Console.ForegroundColor = System.ConsoleColor.Gray; 223 | Console.WriteLine("[+] \"" + Encoding.Default.GetString(tmpSample) + "\""); 224 | } 225 | break; 226 | case 2: 227 | if (highLight) 228 | { 229 | Console.ForegroundColor = System.ConsoleColor.Gray; 230 | Console.WriteLine("[" + lineNumber + "]\t\"" + Encoding.Default.GetString(tmpSample) + "\""); 231 | } 232 | break; 233 | 234 | case 3: 235 | if (highLight) 236 | { 237 | Console.ForegroundColor = System.ConsoleColor.Red; 238 | Console.Write(Encoding.Default.GetString(tmpSample)); 239 | } 240 | else 241 | { 242 | Console.ForegroundColor = System.ConsoleColor.Gray; 243 | Console.Write(Encoding.Default.GetString(tmpSample)); 244 | } 245 | break; 246 | 247 | case 4: 248 | Console.ForegroundColor = System.ConsoleColor.Gray; 249 | Console.WriteLine(Encoding.Default.GetString(tmpSample)); 250 | break; 251 | 252 | } 253 | 254 | if (format == 2) { lineNumber += returnsInSample(tmpSample, length);} 255 | 256 | } 257 | 258 | 259 | 260 | private static int returnsInSample(byte[] sample,int numBytes) 261 | { 262 | 263 | return new Regex(@"\n").Matches(Encoding.Default.GetString(sample).Substring(0,numBytes)).Count; 264 | } 265 | private static AMSI_RESULT scanBuffer(byte[] sample, IntPtr amsiContext) 266 | { 267 | AMSI_RESULT result = 0; 268 | int returnValue; 269 | IntPtr session = IntPtr.Zero; 270 | 271 | if (format==4) 272 | { 273 | showText(sample, 0, sample.Length, false); 274 | } 275 | 276 | 277 | returnValue = AmsiScanBuffer(amsiContext, sample, (uint)sample.Length, "Sample", IntPtr.Zero, out result); 278 | amsiCalls++; 279 | return result; 280 | } 281 | 282 | private static Boolean protectionEnabled(IntPtr amsiContext) 283 | { 284 | 285 | byte[] sample = Encoding.UTF8.GetBytes("Invoke-mimikatz"); 286 | AMSI_RESULT result = Triggers.scanBuffer(sample, amsiContext); 287 | 288 | if (result == AMSI_RESULT.AMSI_RESULT_NOT_DETECTED) 289 | { 290 | Console.WriteLine("[+] Check Real Time protection is enabled"); 291 | return false; 292 | } 293 | else 294 | { 295 | return true; 296 | } 297 | 298 | } 299 | 300 | } 301 | } 302 | 303 | -------------------------------------------------------------------------------- /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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If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. 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 | --------------------------------------------------------------------------------