2026from public repositories
Psru Hackathon 2026
4 challenges with 4 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveMisc2
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Solve it with:Brainfuck and esolang decoderCipher identifier and automatic decoderRegex tester with match offsets and capture groupsLearn: Recognising encodings
Http Exfiltration
1 official solutionAlso written up in: rorowanwan/ctf-writeups
Vsftpd Backdoor
1 official solutionAlso written up in: rorowanwan/ctf-writeups
Cryptography1
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Solve it with:Cipher identifier and automatic decoderVigenere cipher solver with automatic key recoveryRSA decryption and attack runnerWiener’s attack on small RSA private exponentsIn-browser hash cracker with rule transformsLearn: Classical ciphers and frequency analysisLearn: RSA and the parameters that break it
Custom Cpu Emulator
1 official solutionAlso written up in: rorowanwan/ctf-writeups
Uncategorised1
The upstream scoreboard did not say, so neither do we.
Investigation Password Spray Webshell
1 official solutionAlso written up in: rorowanwan/ctf-writeups