metafang2 interfaces with a Metasploit RPC instance to generate .NET executables that run x86/x64 shell code in a platform-agnostic way. One binary to rule them all. Also provides an encryption mechanism that will bruteforce the payload’s key at run time.
You can download it from the following link: https://packetstormsecurity.com/files/download/126591/metafang2-master.zip
Source: https://packetstormsecurity.com/files/126591/Metafang2-.NET-Generator.html