# BlackHat MEA CTF Final 2025

CTFTime: [https://ctftime.org/event/2877](<https://ctftime.org/event/2877>)

Participated as a member of [Redbud](<https://ctftime.org/team/20555>)

Writeups by ptr-Yudai: [https://gist.github.com/ptr-yudai/ebf09b77256853fdfc3b2da5335b5ff2](<https://gist.github.com/ptr-yudai/ebf09b77256853fdfc3b2da5335b5ff2>)

Writeups by Rosayxy: [https://blog.rosay.xyz/blackhat-mea-pwn-writeup/](<https://blog.rosay.xyz/blackhat-mea-pwn-writeup/>)

Result: 5th Place

Solved challenges that I involved in:

Day 1:

- [que](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/que.html>)
- [Tampering Detection System](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/tampering-detection-system.html>)
- [Verifmt](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/verifmt.html>)

Day 2:

- [Bridged](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/bridged.html>)
- [Between The Lines](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/between-the-lines.html>)
- [RanWide](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/ranwide.html>)
- [Limeade](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/limeade.html>)

Day 3:

- [PointBreak](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/pointbreak.html>)
- [Noisy Channel](<https://jia.je/ctf-writeups/2025-12-02-blackhat-mea-ctf-final-2025/noisy-channel.html>)