All development has been done with MonoDevelop on Linux. The client has been tested on windows, and the server should work on windows, but has not been tested.
This is the client half of a PoC tor shell. This shell works by sending a modified Base64 HTTPS request to https://tor-proxy.net/. tor-proxy.net will then forward an HTTP request to a .onion server that is specified on the command line.
What this gives you:
1) an encrypted Command and Control channel out of the victim network
2) anonymity, noone knows who is controlling the client
3) cross platform, works on Unix if mono is installed
a) default on Ubuntu/Debian
Check carnal0wnage.attackresearch.com for more info and download