For WINDOWS. tested on Windows 7.

A simple multithreaded backdoor. Spawns a command prompt and redirects input and output over a TCP socket that can be accessed via netcat.

Change the PORT_NUMBER define at the top of the file to fit your needs.

Good to add on to other projects.

Based (heavily in some sections) on code from http://hackforlifeee.wordpress.com/2012/01/13/basic-backdoor-c/ but adds a few things:

• Socket timouts via select() (program isn't hung up by accept())
• Multithreads the whole thing so multiple connections can be made simultaneously
• Increments the port number if binding fails so it can still be accessed
• Removed global variables
• Commented more, made variable names a bit more understandable

Compile for maximum compatibility (no VC++ Redistributables required) as detailed here: https://wumb0.in/Compiling-Redistributable-DLL-Independent-in-Visual-Studio.html

Enjoy!