SubBrute
SubBrute is an open source subdomain enumeration tool. It is community maintained and aims to be the fastest and most accurate domain finding tool. It makes use of open DNS resolvers to bypass rate-limiting restrictions.
This doesn't come preinstalled with Kali Linux and must be downloaded from https://github.com/TheRook/subbrute:
./subbrute.py target.com
Let us run SubBrute against PacktPub's website and see what results it yields:
You can see list of subdomains purging out. This tool utilizes open DNS resolvers to partially make this process somewhat passive. We have to use the –r
switch to supply our own custom resolver list.