DllProxy-rs

Rust Implementation of SharpDllProxy for DLL Proxying Technique

Features

• Everything in SharpDllProxy
• Automatic compile and build DLL

Requirements

• Rust
• Cargo
• cargo-make
• Visual Studio 2019/2022 with Visual C++ Build Tools or Standalone Visual Studio Build Tools 2019/2022 from https://aka.ms/vs/17/release/vs_BuildTools.exe

Build Instructions

1. Install Rust and cargo
2. Install cargo-make

cargo install --force cargo-make

3. Build release app

cargo make -p release build-release

4. Run the app as described at Usage section.

Usage

Before you can use it, you need to build first. Please read build instructions

• Help Information

PS C:>.\dll_proxy_rs.exe -h
DllProxy-rs 1.0
Petruknisme <me@petruknisme.com>
Rust Implementation of SharpDllProxy for DLL Proxying Technique

USAGE:
    dll_proxy_rs.exe [OPTIONS] --dll <DLL> --payload <PAYLOAD>

OPTIONS:
    -a, --auto                 Automatic DLL compilation
    -d, --dll <DLL>            Dll File Location to hijack
    -h, --help                 Print help information
    -p, --payload <PAYLOAD>    Shellcode file to insert in the hijacked dll
    -V, --version              Print version information

• Run without automatic dll compilation

.\dll_proxy_rs.exe -d <path/to/file.dll> -p <path/to/shellcode.bin>

• Run with automatic dll compilation

.\dll_proxy_rs.exe -d <path/to/file.dll> -p <path/to/shellcode.bin> -a

Note: For this example, I'm just using msfvenom to generate the payload

msfvenom -a x64 --platform windows -p windows/x64/messagebox TEXT="DLL Proxy Loading using Rust worked!" -f raw > shellcode.bin

Demo

Thanks to

• Flangvik for his SharpProxyDll

References

• https://redteaming.co.uk/2020/07/12/dll-proxy-loading-your-favorite-c-implant/
• https://www.ired.team/offensive-security/persistence/dll-proxying-for-persistence

License

MIT License