Writeups

Cobweb

Writeup for Cobweb from Codegate2026

Cogwartslang

Writeup for Cogwartslang from Codegate2026

Comqtt

Writeup for Comqtt from Codegate2026

Greybox

Writeup for Greybox from Codegate2026

Oldschool

Writeup for Oldschool from Codegate2026

Tinyirc

Writeup for Tinyirc from Codegate2026

Explorer

Reversing a kernel maze device and solving the harder problem of getting a tiny helper into the VM

Interpreter Required

Parsing the CJK lambda-calculus riddle into ordinary arithmetic instead of reducing it

Forge

Cutting through anti-debug noise and solving Forge as linear algebra over a custom byte field

Requiem

Recovering an embedded flag from a Rust binary by finding the XOR-then-wipe routine

Lactf 1986

Bruteforcing a 20-bit self-seeded stream cipher in a retro DOS flag checker

The Cat

Writeup placeholder kept honest because the original solve notes are missing

The Fish

Reversing the Fish checker by undoing its Collatz-style encoding

CSCV_2025_RE

Two CSCV reversing solves: an anti-debug fake flag checker and a PyInstaller chatbot with a native AES decryptor

PicoMini_by_CMU_Africa

Two Android reversing solves from PicoMini by following the actual app artifacts instead of the obvious screens

WannaGame Championship 2025 - Reversing Writeup

Writeup for WGC 2025 reversing challenges: Buzzing, Checker, and Dutchman_app.