HackDay 2025 - Qualifications
10 challenges with 10 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 CTFtimeUncategorised6
The upstream scoreboard did not say, so neither do we.
Drunk Christmas
1 official solutionAlso written up in: MohandAcherir/Writeups
Lonely bot (prog)
1 official solutionAlso written up in: Bnyt7/CTF-Writeups
OpenTheDoor
1 official solutionAlso written up in: Ax8457/WriteUPs
PNG extractor
1 official solutionAlso written up in: Ax8457/WriteUPs
TheCopperWireExtraction
1 official solutionAlso written up in: Ax8457/WriteUPs
TheInternalBlog
1 official solutionAlso written up in: Ax8457/WriteUPs
Forensics3
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Copperwire Extraction
1 official solutionAlso written up in: Bnyt7/CTF-Writeups
Edgar
1 official solutionAlso written up in: Bnyt7/CTF-Writeups
I believe you can't fly
1 official solutionAlso written up in: Bnyt7/CTF-Writeups
Reverse engineering1
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- reversing
Same technique in picoCTF: Checkpass, WinAntiDbg0x100, WinAntiDbg0x200