2025from public repositories
Internal Selection CTF 2025
20 challenges with 20 published solutions between them. CTFtime has no listing for this event at all, so nothing built on CTFtime can show what it was made of. These writeups were found in public repositories instead. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised11
The upstream scoreboard did not say, so neither do we.
Atadatem
1 official solutionBlind file
1 official solutionCheck Disasm
1 official solutionCheck It Out
1 official solutionDay 1
1 official solutionI Forgot Something
1 official solutionLeFI Gimang
1 official solutionLockpicking
1 official solutionMy Networ(th)k
1 official solutionStrings
1 official solutionWASM (Weird Assembly)
1 official solution
Cryptography5
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
Based
1 official solutionNothing
1 official solutionSquare
1 official solution
OSINT4
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
Guessr 1
1 official solutionGuessr 2
1 official solutionGuessr 3
1 official solutionRaja Renov
1 official solution