HTB Hack The Boo 2022 Writeups

Another great CTF from HTB, this time it started at midnight for me with fresh new challenges each midnight for 5 nights. All the challenges seemed to be of quite high quality and had me thinking hard about the solutions.

srdnlen CTF 2022 - Fancy E

Haven’t done any writeups lately as I’ve not been having much time to do CTFs. This CTF caught my attention on the weekend though for its approachable set of intro challenges. I ended up finishing 15th on the scoreboard. This challenge was interesting because of the unintended solutions. I’ll go through one of these below.

niteCTF - CBC-Jail

A unique combination of Python jailbreak and crypto flaw that had me learning a lot about AES-CBC mode. Super fun for me to get this solution working.

niteCTF - Rabin to the Rescue

Another fun CTF that gave me plenty of challenges to learn from. I solved a good amount of the Crypto challenges in this one as well as the crypto related pwn challenge. This one got some good use out of my own RSA tooling so I decided to write it up.

HTB CyberSanta 2021 - Crypto Writeups

HTB sure have a slick new CTF platform and it was a pleasure to play this CTF. I’m not really a fan of how they released challenges though (daily, always 5 challenges, always at midnight for me). Still the challenges were fun so I can’t complain.