Finding Candidates for Subdomain Takeovers

A subdomain takeover occurs when a subdomain (like example.jarv.is) points to a shared hosting account that is abandoned by its owner, leaving the endpoint available to claim for yourself.

Not only are takeovers a fun way to dip your toes into penetration testing, but they can also be incredibly lucrative thanks to bug bounty programs on services like HackerOne and Bugcrowd, where corporations pay pentesters for their discoveries.