You are a cybercrime investigator who is on the trail of a notorious hacker who goes by the handle, ZeroCool. ZeroCool left 5 flags hidden on the subdomain Find all 5 flags to locate the hacker and add your name to the list!

Note: None of the flags require a brute-force attack. Please do not spam the server with failed login attempts on any services. is a Capture the Flag style challenge that I created for anybody interested in cyber security. The focus areas that this challenge measures are vulnerability discovery, exploit creation, toolkit creation, and operational tradecraft. Please email if you’d like a hint.