WebDavC2 - A WebDAV C2 Tool


WebDavC2 is a PoC of using the WebDAV protocol with PROPFIND only requests to serve as a C2 communication channel between an agent, running on the target system, and a controller acting as the actuel C2 server.

Architecture
WebDavC2 is composed of:
  • a controller, written in Python, which acts as the C2 server
  • an agent, written in C#/.Net, running on the target system, delivered to the target system via various initial stagers
  • various flavors of initial stagers (created on the fly when the controller starts) used for the initial compromission of the target system

Features
WebDavC2 main features:
  • Various stager (powershell one liner, batch file, different types of MS-Office macro, JScript file) - this is not limited, you can easily come up with your own stagers, check the templates folder to get an idea
  • Pseudo-interactive shell (with environment persistency)
  • Auto start of the WebClient service, even from an unprivileged user using the 'pushd' trick

Installation & Configuration
Installation is pretty straight forward:
  • Git clone this repository:
    git clone https://github.com/Arno0x/WebDAVC2 WebDavC2
  • cd into the WebDavC2 folder:
    cd WebDavC2
  • Give the execution rights to the main script:
    chmod +x webDavC2.py
To start the controller, simply type
./webDavC2.py
.

Compiling your own agent
Although it is perfectly OK to use the provided agent.exe, you can very easily compile your own executables of the agent, from the source code provided. You don't need Visual Studio installed.
  • Copy the
    agent/agent.cs
    file on a Windows machine with the .Net framework installed
  • CD into the source directory
  • Use the .Net command line C# compiler:
    • To get the standard agent executable:
      C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe /out:agent.exe *.cs
    • To get the debug version:
      C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe /define:DEBUG /out:agent_debug.exe *.cs


WebDavC2 - A WebDAV C2 Tool WebDavC2 - A WebDAV C2 Tool Reviewed by Lydecker Black on 10:30 AM Rating: 5