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Every CTF
2024from public repositories

HelseCTF 2024

35 challenges with 44 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 live

Uncategorised17

The upstream scoreboard did not say, so neither do we.

Misc9

Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.

Reverse engineering4

Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.

Steganography4

Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.

OSINT1

Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.

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