Huntress CTF 2025

Huntress CTF 2025 Writeup

Completion Certificate Day 01 Spam Test Category Author 👶 Warmups John Hammond Challenge Prompt Time to do some careful Googling… what’s the MD5 hash of the Generic Test for Unsolicited Bulk Email (GTUBE) string? Submit the hash wrapped within the flag{ prefix and } suffix to match the standard flag format. Solution A Google search for Generic Test for Unsolicited Bulk Email returns the GTUBE Wikipedia page, which contains a table of hash values of the GTUBE string. ...

November 4, 2025