Earlier this month, my friend Washi invited me to take a part in a small CTF competition. It was a first time his team was making something like that, so I did not know what to expect. I must say that RTN CTF was a great success and I really really enjoyed it.
Challenges and official solutions have already been published on RTN Github and few people have already made great and detailed writeups:
https://github.com/CodeOfDark/CTF-Writeups/tree/master/RTN/2021
https://holly-hacker.github.io/ctf-writeups/2021-01_RTNCTF/Index.html
https://zsr2531.github.io/writeups/RTN_2021/
I have no intention of repeating what's already been said and done, so I'll just add a few personal notes about how I solved the most interesting challenges. 🙂