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/105893/Jynx-Kit-Pub.tar.gz
Source: https://packetstormsecurity.com/files/105893/Jynx-Kit-Userland-Rootkit.html