All Writeups

Comprehensive collection of CTF challenges, solutions, and insights.

2026-03-01 Misc Insane

DEADROP Misc 6 - //CHAOS

A meta-challenge hidden across the DEADROP platform. No challenge listing, no files, no hints. Four flag fragments concealed using four different techniques, favicon MD5 steganography, a hidden 404 endpoint, zero-width Unicode in a checksum field, and a non-standard base64 meta attribute. Unit 7 says hello.

meta steganography osint unicode

2026-03-01 Misc Hard

DEADROP Misc 5 - Flatearth Committee Minutes

Meeting minutes from the agency's Flat Earth Contingency Planning Committee hide four flag pieces across the docx XML structure, white-on-white text, an XML comment, a custom document property, and a Word comment. A .docx is a ZIP, unzip it.

docx xml forensics steganography

2026-03-01 Misc Hard

DEADROP Misc 4 - SIGINT PUZZLE

Three fake declassified SIGINT documents hide base64 flag fragments in the least significant bits of the red channel. The lore tells you the order; extract, concatenate, decode.

steganography lsb png image-forensics