2025no writeups on CTFtime
HeroCTF v7
14 challenges with 15 published solutions between them. CTFtime lists this event but has no writeups filed against it, so it is absent from the index CTFtime feeds. These were found in public repositories instead. Each link is pinned to the commit it was read from.
The event on CTFtimeUncategorised9
The upstream scoreboard did not say, so neither do we.
Safe Device
2 official solutionsExp01
1 official solutionExp01 Commented
1 official solutionNeverland
1 official solutionRevoked
1 official solutionThe Chef's Secret Recipe
1 official solutionWhac A Mole
1 official solutionWriteup01
1 official solution
Misc3
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
2025 11 30 Heroctf Freeda Native Hook
1 official solution2025 11 30 Heroctf Freeda Not Root
1 official solution2025 11 30 Heroctf Freeda Simple Hook
1 official solution
Cryptography2
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
Andor
1 official solutionPerilous
1 official solution