Wargames.MY CTF 2024 — Misc: Invisible Ink (388 pts)

Overview

This challenge involves finding hidden content within a GIF file using the transparency properties of the GIF format.

Solution

Tool: StegSolve

1. Open the GIF in StegSolve and browse individual frames
2. Frames 5 and 6 contain hidden content — visible as dark sections
3. Apply random color mapping to the extracted frames to reveal the concealed text
4. Combine the two frames to get the complete flag

The GIF format’s transparency channel can mask data that only becomes visible through frame-by-frame analysis and color manipulation.

Flag

wgmy{d51d8cd900b204e9800998ecf8427e}