NBChk is a multi-threaded Perl banner-checking utility that is fully configurable and can scan a full/partial class-C network, hosts from a file, or a single host for configured vulnerabilities.
You can download it from the following link: https://packetstormsecurity.com/files/download/11488/nbchk.pl
Source: https://packetstormsecurity.com/files/11488/nbchk.pl.html