Against is a very fast ssh attack script which includes a multithreaded port scanning module (tcp connect) for discovering possible targets and a multithreaded brute-forcing module which attacks in parallel (multiprocessing) all discovered hosts or given ip addresses from a list.
You can download it from the following link: https://packetstormsecurity.com/files/download/125471/against-0.2.py.txt
Source: https://packetstormsecurity.com/files/125471/Against-Mass-Scanner-SSH-Brute-Forcer-0.2.html

