This is a reverse shell over SCTP implemented in Python. Currently it does not use SSL, but may evade most firewalls and IDS devices as many of them seemingly have no rules in place to check SCTP traffic.
You can download it from the following link: https://packetstormsecurity.com/files/download/122169/sctp_reverse.py.txt
Source: https://packetstormsecurity.com/files/122169/SCTP-Reverse-Shell.html