https://0x00ctrl.github.io/My Library 2026-08-18T08:51:58+00:00 0ctrl https://0x00ctrl.github.io/ Jekyll © 2026 0ctrl /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2025-09-02T15:00:00+00:00 2026-08-08T20:59:09+00:00 https://0x00ctrl.github.io/posts/cookedctf-nightmare/ 0ctrl

The description of the challenge says: Two presences converge, one shrouded, one revealed. Which shadow must recede to illuminate the truth? So according to the description we can say something is shrouded (hidden) in this file. Let’s first use the OG tool for working with multimedia files to analyze this video. *FFMPEG* It comes pre-installed in almost every Linux distro but you can ins...

2025-09-02T15:00:00+00:00 2026-08-10T10:49:01+00:00 https://0x00ctrl.github.io/posts/cooked-ctf-2025-hollow-keys-misc-challenge-writeup/ 0ctrl

With this challenge we get a audio file easy4.mp3 It sounds like some radio transmission. The title of the challenge is “Hollow Keys”, so some sort of keys may have been used to generate this transmission. After researching on the Internet for a transmission that involves keys and a printer as mentioned in the challenge description, this looks like a Radio TeleType Transmission or RTTY. An ...