2023weight 43.50hackpack

HackPack CTF 2023

6 challenges with 9 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 CTFtime

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 decoder Cipher identifier and automatic decoder Regex tester with match offsets and capture groups Learn: Recognising encodings

Cat Me if You Can
100 pts1 writeup
- misc
Same technique in picoCTF: Permissions, Specialer, Codebook
HackerChat
269 pts1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook
Welcome!
1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook

Reverse engineering2

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 blobs WebAssembly disassembler Java .class disassembler Python .pyc bytecode disassembler Learn: Binary exploitation

Speed-Rev: Bots
147 pts3 writeups
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
Speed-Rev: Humans
100 pts1 writeup
- rev
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300

Web1

Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.

Solve it with:JWT decoder and signature verifier JWT alg=none bypass generator Web attack payload catalog JWT secret brute force Learn: Web attacks and session tokens

WolfHowl
100 pts2 writeups
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3

Misc3

Cat Me if You Can

HackerChat

Welcome!

Reverse engineering2

Speed-Rev: Bots

Speed-Rev: Humans

Web1

WolfHowl

Other 2023 events