BruteDomain is a DNS Mapping tool. It is useful for finding sub-domains of a host which does not have reverse lookups available.
You can download it from the following link: https://packetstormsecurity.com/files/download/31790/brutedomainv0.2.tar.gz
Source: https://packetstormsecurity.com/files/31790/brutedomainv0.2.tar.gz.html