RBTree

Having some troubles with my server. My webpages won't be availble for hours (or more). Seems like I have messed up file system somehow 🫠

Should I try AlpacaHack :thinking:

Just it reminds me of chess, then Go.

Top players won't be affected for now, because they can understand solutions from those AI slops. But as time goes on, LLMs are getting improved to catch up. In the end, what's the meaning of playing CTFs anymore?

I don't have any opinion on using LLMs in CTFs. It’s just the way the world is going. The sad thing is, I feel like it's robbing people of opportunities to learn. Of course, you can play CTFs without LLMs, but doing so may cost you your chance to win, or qualify for the finals.

With regards to the CTF discussion, I think we need t-shirts of '90 style website buttons which say: 1337 Pre-AI CTF Player 1337 I reversed on CTFs before IDA had a DECOMPILER! In my days it was called a WARGAME I HAD TO SOLDER MY OWN COMPUTER

@Dantxlian_ Are you the author? or did the author say so?

@RBTree_ Throw compute

What was the intended solution for carry the flame?

I was thinking of some sort of sliding attack methods, but gave up as the given encryption function was too slow. Used CUDA coding to solve with my 3080.

For the past two years, Zellic has run validators and key infrastructure for partner chains. In that time, we’ve given back over $500,000 in free audits. Most auditors stop at the report. We don’t. At Zellic, you get ongoing network security from the world’s top whitehats.

github.com/hyunsikjeong/m… Vibe coded a VS Code plugin. Going to use in next audits as much as possible

@Yu_212_MC Tysm, I'll try the revenge chal when I have time! I enjoyed your challenges🥰 (I couldn't go to Saudi tho🥲)

@RBTree_ My chals, including the revenge challenge, have been ported to AlpacaHack🦙. I don't have any plans to write an author writeup at the moment, but I might if I have the time... x.com/Yu_212_MC/stat…

I couldn't go to Riyadh this time tho, I heard that crypto challenges from the BH MEA CTF finals were very good. Is there any official write-ups or sth 🤔

12/2-4に開催されたBlackHat MEA CTF Final 2025にCryptoの問題を2問提供しました！ そして、revenge問を含む3問をAlpacaHackに移植していただきました🦙ぜひ解いてみてください！ alpacahack.com/challenges/noi… alpacahack.com/challenges/dol… alpacahack.com/challenges/dol…

Updated rbtree.info

Just published an IDA plugin: HappyIDA Built with @h3xr4bb1t and @scwuaptx , and I’ve been using it in my daily reversing work for 1~2 years. There’s still a lot to do, but it felt like the right time to make it public, so we’re more likely to fix things (and hopefully some kind stranger will help us) It’s fancy, but not that fancy. Honestly, IDA Pro would be better if they adopted some of these ideas. There is no complex algorithms, no timeless debugger, no symbolic execution, but just a bunch of tiny features that have already helped me speed up reversing a lot. (The screenshot shows the origin of the project and the first feature I implemented: parameter labeling. @h3xr4bb1t later made it much more powerful. The SEH highlighter was made by @scwuaptx, and the SEH rebuilder was made by @h3xr4bb1t) github: github.com/HappyIDA/Happy…

Joined @zellic_io this week. I want to see how much I can hone my expertise here.

Happy new year from Japan :D

A POC for CVE-2025-55182 gist.github.com/maple3142/48bc…