In this post, I’m going to solve the SpamLess challenge from UUTCTF2021. It is about sending an email without being spam to [email protected] address. The mail server is served as a Tor’s hidden service.
Now the writeup …
I’ve described the needed tools and methods for solving the question in the following video. You can check my previous post about fetching a hidden service’s public key which is needed for solving this challenge.