Nullcon Berlin HackIM 2025 CTF
11 challenges with 16 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeMisc9
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
pwgen
3 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
grandmas_notes
2 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Slasher
2 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
webby
2 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Field trip
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
hidden_strings
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Magnetic tape
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Power tower
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
usbstorage
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
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.
decryption execution service
1 writeupSame technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Simple ECDSA
1 writeupSame technique in picoCTF: Shared Secrets, StegoRSA, Timestamped Secrets