2020from public repositories
Deep.Ctf 2020
4 challenges with 4 published solutions between them. The writeups for this event were found in public repositories and on the authors’ own sites. Each repository link is pinned to the commit it was read from.
Where these writeups liveUncategorised2
The upstream scoreboard did not say, so neither do we.
l33tRSA
1 official solutionAlso written up in: cxzero/ctf-writeups
Rsa1.0
1 official solutionAlso written up in: cxzero/ctf-writeups
Misc1
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
Also written up in: 0x8LayerTeam/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.
Solve it with:Strings extractor for binaries and blobsWebAssembly disassemblerJava .class disassemblerPython .pyc bytecode disassemblerLearn: Binary exploitation
Engineering
1 official solutionAlso written up in: kos0ng.medium.com