m0rtix.c is a simple C linux backdoor which bind a shell to a port with tty fork. The processes are hidden and it contains a kernel version detector which tell you what local root exploit you must use to root the system.
You can download it from the following link: https://packetstormsecurity.com/files/download/45882/m0rtix.c
Source: https://packetstormsecurity.com/files/45882/m0rtix.c.html