Reverse Engineering
Reverse engineering is the process of gleaning implementation details, typically from a black box. It is also a category of CTF challenge which involves tasks such as decompiling and understanding program logic. Reverse is also one of the strongest UNO cards, extremely effective in certain situations.
Reverse Engineering a Siemens Programmable Logic Controller for Funs and Vulns (CVE-2024-54089, CVE-2024-54090 & CVE-2025-40757)
When security by obscurity breaks...
HKCERT CTF 2023 – Decompetition: Vitamin C++
A beginner-friendly writeup to reverse-engineering C++ a lá decompetition. Years of complex shenanigans condensed!
![Thumbnail for N[Subtype Metaprogramming] is N[Mostly Harmless]](/img/posts/programming/concepts/subtype-metaprogramming/assets/thumbnail-512w.webp)
N[Subtype Metaprogramming] is N[Mostly Harmless]
Inheritance go brrrrrrrr... abusing turing-complete typesystems to write fun programs in Python.
HITCON 2023 – The Blade
Beginner-friendly writeup for a nifty Rust reversing challenge.
GDB/GEF Cheatsheet
Quick command reference on one of the most powerful tools for dynamic analysis.
DUCTF 2023 – Wrong Signal
You straight to oops(). Right away.
HKCERT CTF 2022 – C++harming Website
A harming website? Hope it doesn't harm my sleep!
DownUnderCTF 2022 – ezpz-rev
Grid puzzles aren't that easy.
AOC 2021 Day 24 – No U
Finally a reverse engineering challenge in Advent of Code.
TAMUctf 2022 – Labyrinth
Using CFGs to solve a control-flow maze.