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OffensivePipeline - Allows You To Download And Build C# Tools, Applying Certain Modifications In Order To Improve Their Evasion For Red Team Exercises

By: noreply@blogger.com (Unknown) · noreply@blogger.com (Unknown)


OfensivePipeline allows you to download and build C# tools, applying certain modifications in order to improve their evasion for Red Team exercises.
A common use of OffensivePipeline is to download a tool from a Git repository, randomise certain values in the project, build it, obfuscate the resulting binary and generate a shellcode.


Features

  • Currently only supports C# (.Net Framework) projects
  • Allows to clone public and private (you will need credentials :D) git repositories
  • Allows to work with local folders
  • Randomizes project GUIDs
  • Randomizes application information contained in AssemblyInfo
  • Builds C# projects
  • Obfuscates generated binaries
  • Generates shellcodes from binaries
  • There are 79 tools parameterised in YML templates (not all of them may work :D)
  • New tools can be added using YML templates
  • It should be easy to add new plugins...

What's new in version 2.0

  • Almost complete code rewrite (new bugs?)
  • Cloning from private repositories possible (authentication via GitHub authToken)
  • Possibility to copy a local folder instead of cloning from a remote repository
  • New module to generate shellcodes with Donut
  • New module to randomize GUIDs of applications
  • New module to randomize the AssemblyInfo of each application
  • 60 new tools added

Examples

  • List all tools:
OffensivePipeline.exe list
  • Build all tools:
OffensivePipeline.exe all
  • Build a tool
OffensivePipeline.exe t toolName
  • Clean cloned and build tools
OffensivePipeline.exe

Output example

PS C:\OffensivePipeline> .\OffensivePipeline.exe t rubeus

                                                                                                   ooo
                                                                                           .osooooM M
      ___   __  __                _           ____  _            _ _                      +y.     M M
     / _ \ / _|/ _| ___ _ __  ___(_)_   _____|  _ \(_)_ __   ___| (_)_ __   ___           :h  .yoooMoM
    | | | | |_| |_ / _ \ '_ \/ __| \ \ / / _ \ |_) | | '_ \ / _ \ | | '_ \ / _ \          oo  oo
    | |_| |  _|  _|  __/ | | \__ \ |\ V /  __/  __/| | |_) |  __/ | | | | |  __/          oo  oo
     \___/|_| |_|  \___|_| |_|___/_| \_/ \___|_|   |_| .__/ \___|_|_|_| |_|\___|          oo  oo
                                                     |_|                            MoMoooy.  h:
                                                                                       M M     .y+
                                                                                    M Mooooso.
                                                                                    ooo

                                                                    @aetsu
                                                                                v2.0.0


[+] Loading tool: Rubeus
    Clonnig repository: Rubeus into C:\OffensivePipeline\Git\Rubeus
                 Repository Rubeus cloned into C:\OffensivePipeline\Git\Rubeus

    [+] Load RandomGuid module
        Searching GUIDs...
                > C:\OffensivePipeline\Git\Rubeus\Rubeus.sln
                > C:\OffensivePipeline\Git\Rubeus\Rubeus\Rubeus.csproj
                > C:\OffensivePipeline\Git\Rubeus\Rubeus\Properties\AssemblyInfo.cs
        Replacing GUIDs...
                File C:\OffensivePipeline\Git\Rubeus\Rubeus.sln:
                           > Replacing GUID 658C8B7F-3664-4A95-9572-A3E5871DFC06 with 3bd82351-ac9a-4403-b1e7-9660e698d286
                        > Replacing GUID FAE04EC0-301F-11D3-BF4B-00C04F79EFBC with 619876c2-5a8b-4c48-93c3-f87ca520ac5e
                        > Replacing GUID 658c8b7f-3664-4a95-9572-a3e5871dfc06 with 11e0084e-937f-46d7-83b5-38a496bf278a
                [+] No errors!
                File C:\OffensivePipeline\Git\Rubeus\Rubeus\Rubeus.csproj:
                        > Replacing GUID 658C8B7F-3664-4A95-9572-A3E5871DFC06 with 3bd82351-ac9a-4403-b1e7-9660e698d286
                        > Replacing GUID FAE04EC0-301F-11D3-BF4B-00C04F79EFBC with 619876c2-5a8b-4c48-93c3-f87ca520ac5e
                        > Replacing GUID 658c8b7f-3664-4a95-9572-a3e5871dfc06 with 11e0084e-937f-46d7-83b5-38a496bf278a
                [+] No errors!
                File C:\OffensivePipeline\Git\Rubeus\Rubeus\Properties\AssemblyInfo.cs:
                           > Replacing GUID 658C8B7F-3664-4A95-9572-A3E5871DFC06 with 3bd82351-ac9a-4403-b1e7-9660e698d286
                        > Replacing GUID FAE04EC0-301F-11D3-BF4B-00C04F79EFBC with 619876c2-5a8b-4c48-93c3-f87ca520ac5e
                        > Replacing GUID 658c8b7f-3664-4a95-9572-a3e5871dfc06 with 11e0084e-937f-46d7-83b5-38a496bf278a
                [+] No errors!


    [+] Load RandomAssemblyInfo module
        Replacing strings in C:\OffensivePipeline\Git\Rubeus\Rubeus\Properties\AssemblyInfo.cs
                [assembly: AssemblyTitle("Rubeus")] -> [assembly: AssemblyTitle("g4ef3fvphre")]
                [assembly: AssemblyDescription("")] -> [assembly: AssemblyDescription("")]
                [assembly: AssemblyConfiguration("")] -> [assembly: AssemblyConfiguration("")]
                [assembly: AssemblyCompany("")] -> [assembly: AssemblyCompany("")]
                [assembly: AssemblyProduc   t("Rubeus")] -> [assembly: AssemblyProduct("g4ef3fvphre")]
                [assembly: AssemblyCopyright("Copyright ©  2018")] -> [assembly: AssemblyCopyright("Copyright ©  2018")]
                [assembly: AssemblyTrademark("")] -> [assembly: AssemblyTrademark("")]
                [assembly: AssemblyCulture("")] -> [assembly: AssemblyCulture("")]


    [+] Load BuildCsharp module
        [+] Checking requirements...
        [*] Downloading nuget.exe from https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
                [+] Download OK - nuget.exe
                [+] Path found - C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\VsDevCmd.bat
        Solving dependences with nuget...
        Building solution...
                [+] No errors!
                [+] Output folder: C:\OffensivePipeline\Output\Rubeus_vh00nc50xud


    [+] Load ConfuserEx module
        [+] Checking requirements...
        [+] Downloading ConfuserEx from https://github.com/mkaring/ConfuserEx/releases/download/v1.6.0/ConfuserEx-CLI.zip
                [+] Download OK - ConfuserEx
        Confusing...
                [+] No errors!


    [+] Load Donut module
        Generating shellcode...

Payload options:
        Domain: RMM6XFC3
        Runtime:v4.0.30319

Raw Payload: C:\OffensivePipeline\Output\Rubeus_vh00nc50xud\ConfuserEx\Donut\Rubeus.bin
B64 Payload: C:\OffensivePipeline\Output\Rubeus_vh00nc50xud\ConfuserEx\Donut\Rubeus.bin.b64

                [+] No errors!


    [+] Generating Sha256 hashes
                Output file: C:\OffensivePipeline\Output\Rubeus_vh00nc50xud


-----------------------------------------------------------------
                SUMMARY

 - Rubeus
         - RandomGuid: OK
         - RandomAssemblyInfo: OK
            - BuildCsharp: OK
         - ConfuserEx: OK
         - Donut: OK

-----------------------------------------------------------------

Plugins

  • RandomGuid: randomise the GUID in .sln, .csproj and AssemblyInfo.cs files
  • RandomAssemblyInfo: randomise the values defined in AssemblyInfo.cs
  • BuildCsharp: build c# project
  • ConfuserEx: obfuscate c# tools
  • Donut: use Donut to generate shellcodes. The shellcode generated is without parameters, in future releases this may be changed.

Add a tool from a remote git

The scripts for downloading the tools are in the Tools folder in yml format. New tools can be added by creating new yml files with the following format:

  • Rubeus.yml file:
tool:
  - name: Rubeus
    description: Rubeus is a C# toolset for raw Kerberos interaction and abuses
    gitLink: https://github.com/GhostPack/Rubeus
    solutionPath: Rubeus\Rubeus.sln
    language: c#
    plugins: RandomGuid, RandomAssemblyInfo, BuildCsharp, ConfuserEx, Donut
    authUser:
    authToken:

Where:

  • Name: name of the tool
  • Description: tool description
  • GitLink: link from git to clone
  • SolutionPath: solution (sln file) path
  • Language: language used (currently only c# is supported)
  • Plugins: plugins to use on this tool build process
  • AuthUser: user name from github (not used for public repositories)
  • AuthToken: auth token from github (not used for public repositories)

Add a tool from a private git

tool:
  - name: SharpHound3-Custom
    description: C# Rewrite of the BloodHound Ingestor
    gitLink: https://github.com/aaaaaaa/SharpHound3-Custom
    solutionPath: SharpHound3-Custom\SharpHound3.sln
    language: c#
    plugins: RandomGuid, RandomAssemblyInfo, BuildCsharp, ConfuserEx, Donut
    authUser: aaaaaaa
    authToken: abcdefghijklmnopqrsthtnf

Where:

  • Name: name of the tool
  • Description: tool description
  • GitLink: link from git to clone
  • SolutionPath: solution (sln file) path
  • Language: language used (currently only c# is supported)
  • Plugins: plugins to user on this tool build process
  • AuthUser: user name from GitHub
  • AuthToken: auth token from GitHub (documented at GitHub: creating a personal access token)

Add a tool from local git folder

tool:
  - name: SeatbeltLocal
    description: Seatbelt is a C# project that performs a number of security oriented host-survey "safety checks" relevant from both offensive and defensive security perspectives.
    gitLink: C:\Users\alpha\Desktop\SeatbeltLocal
    solutionPath: SeatbeltLocal\Seatbelt.sln
    language: c#
    plugins: RandomGuid, RandomAssemblyInfo, BuildCsharp, ConfuserEx, Donut
    authUser:
    authToken:

Where:

  • Name: name of the tool
  • Description: tool description
  • GitLink: path where the tool is located
  • SolutionPath: solution (sln file) path
  • Language: language used (currently only c# is supported)
  • Plugins: plugins to user on this tool build process
  • AuthUser: user name from github (not used for local repositories)
  • AuthToken: auth token from github (not used for local repositories)

Requirements for the release version (Visual Studio 2019/2022 is not required)

In the OffensivePipeline.dll.config file it's possible to change the version of the build tools used.

  • Build Tools 2019:
<add key="BuildCSharpTools" value="C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\Common7\Tools\VsDevCmd.bat"/>
  • Build Tools 2022:
<add key="BuildCSharpTools" value="C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\VsDevCmd.bat"/>

Requirements for build

Credits

Supported tools



💾

Chisel-Strike - A .NET XOR Encrypted Cobalt Strike Aggressor Implementation For Chisel To Utilize Faster Proxy And Advanced Socks5 Capabilities

By: noreply@blogger.com (Unknown)


A .NET XOR encrypted cobalt strike aggressor implementation for chisel to utilize faster proxy and advanced socks5 capabilities.


Why write this?

In my experience I found socks4/socks4a proxies quite slow in comparison to its socks5 counterparts and a lack of implementation of socks5 in most C2 frameworks. There is a C# wrapper around the go version of chisel called SharpChisel. This wrapper has a few issues and isn't maintained to the latest version of chisel. It didn’t allow using shellcode with donut, reflectio n methods or execute-assembly. I found a fix for this using the SharpChisel-NG project.

Since the SharpChisel assembly is around 16.7 MB, execute-assembly(has a hidden size limitation of 1 MB) and similar in memory methods wouldn’t work. To maintain most of the execution in memory I incorporated the NetLoader project by Flangvik which is executed via execute-assembly to reflectively host and load a XOR encrypted version of SharpChisel with base64 arguments in memory.

As an alternative, it is also possible to implement similar C# proxies like SharpSocks by replacing the appropriate chisel binaries in the project.

Setup

Note: If using a Windows teamserver skip steps 2 and 3.

  1. Clone/download the repository: git clone https://github.com/m3rcer/Chisel-Strike.git

  2. Make all binaries executable:

  • cd Chisel-Strike

  • chmod +x -R chisel-modules

  • chmod +x -R tools

  1. Install Mingw-w64 and mono:

  • sudo apt-get install mingw-w64

  • sudo apt install mono-complete

  1. Import ChiselStrike.cna in cobalt strike using the Script Manager

Recompile binaries from the src folder if needed.

Usage

chisel can be executed on both the teamserver (windows/linux) and the beacon. With either acting as the server/client. A normal execution flow would be to setup a chisel server on the teamserver and create a client on the beacon connecting back to the teamserver.

Commands

  1. chisel <client/server> <command>: Run Chisel on a beacon

  2. chisel-tms <client/server> <command>: Run Chisel on your teamserver

  3. chisel-enc: XOR Encrypt SharpChisel.exe with a password of choice

  4. chisel-jobs: List active chisel jobs on the teamserver and beacon

  5. chisel-kill: Kill active chisel jobs on a beacon

  6. chisel-tms-kill: Kill active chisel jobs on teamserver

Example

OPSEC

NetLoader can easily be obfuscated and used to bypass defender using projects like NimCrypt2 and the like.

Yet SharpChisel.exe drops a dll on disk due to the use of Costura/Fody packages at a location similar to: C:\Users\m3rcer\AppData\Local\Temp\Costura\CB9433C24E75EC539BF34CD1AA12B236\64\main.dll which is detected by defender. It is advised to obfuscate chisel dll's using projects like gobfuscate in the SharpChisel-NG project and re-build new SharpChisel-NG binaries as shown here.

TODO

  • Figure a way to avoid SharpChisel dropping main.dll on disk / Create a new C# wrapper for chisel.

  • Create a method to parse command output for the chisel-tms command.

Credits



❌