MidNight Sun CTF 2025

27 de maio de 2025 · 424 palavras · 2 minutos · CTF Crypto

Two weeks ago (05/17), we (ELT) participated in MidNight Sun CTF 2025 Quals, a HackingForSoju’s annual CTF event to promote competition around the world. On this writeup, we will talk about a crypto chall, solved by Danilo (dant3) and Lucas (kyo). Oldchall The challenge had the following description ssh bionic@oldchall-wzmj3o9b.ctf.pro / Password: F33lOldY3t We posted the quals so much that this chall is straight from 2018. The initial step was to log in via ssh using the credentials provided, granting access to the challenge’s remote machine.

DEF CON Quals 2025

21 de maio de 2025 · 3208 palavras · 16 minutos · CTF Reversing Crypto

More than one month has past since DEF CON Quals, but we were so exhausted by it only now we managed to put together this set of write-ups. This year, several CTF-BR affiliated teams united to form pwn de queijo (a pun with pão de queijo). Together, we managed to achieve top17, the best position achieved by a Brazilian team until now. Let’s keep training to get qualified to the Finals next year :D