Ntbindshell is a lightweight (24k compiled) cmd.exe backdoor for Windows. Full C source included. Provides two modes of operation – standard (listening mode) or reverse-connect mode. Includes the ability to install itself as a system service, providing a shell with LocalSystem privileges.
You can download it from the following link: https://packetstormsecurity.com/files/download/31858/ntbindshell.zip
Source: https://packetstormsecurity.com/files/31858/ntbindshell.zip.html