Back again with more DNS enumeration tools. This one has been around for quite some time and is used by penetration testers across the globe. DNSEnum is a tool used to brute force subdomains on a DNS server. It is a multithreaded perl script that collects A records and queries Google or a wordlist to discover subdomains. Many tools can be used to do this like a short bash script but DNSEnum comes equipped with many other modules that can assist in its main purpose, to get as much info as possible from a domain.
DNSEnum operates by using the following operations:
- Get the host’s addresses (A record).
- Get the namservers (threaded).
- Get the MX record (threaded).
- Perform axfr queries on nameservers and get BIND versions(threaded).
- Get extra names and subdomains via google scraping (google query = “allinurl: -www site:domain”).
- Brute force subdomains from file, can also perform recursion on subdomain that have NS records (all threaded).
- Calculate C class domain network ranges and perform whois queries on them (threaded).
- Perform reverse lookups on netranges (C class or/and whois netranges) (threaded).
- Write to domain_ips.txt file ip-blocks.
For further details and installation instructions check out the project on Github here
Conclusion
For a walkthrough on how to use this tool in an active environment check out this room on HackTheBox . As often as i have used this tool I have to give this one a 5/5 rating. Nothing I can think of to make this tool better especially since you can just add extra perl modules just by running the command in the downloaded DNSEnum folder. Great work guys!
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