scanssh scans a list of addresses and networks for running SSH servers and their version numbers. scanssh supports random selection of IP addresses from large network ranges and is useful for gathering statistics on the deployment of SSH servers in a company or the Internet as whole.
You can download it from the following link: https://packetstormsecurity.com/files/download/25526/scanssh-1.6b.tar.gz
Source: https://packetstormsecurity.com/files/25526/scanssh-1.6b.tar.gz.html