Stickers (9ff6401f-2c68-4b01-a557-5d01fe1e3954)

hackerlab

Task: GIF file with corrupted header (first 6 bytes zeroed) and hidden sticker pack. Solution: Restore GIF89a header, extract frames, discover frames 10-12 have larger dimensions (600x600 vs 512x512), extract flag from green channel in the hidden canvas area below 512px.

steganography green_channel frame_extraction gif animated_gif corrupted_header resolution_mismatch hidden_canvas image_forensics

Color channel separation (green channel)Frame-by-frame resolution analysisGIF header repair (corrupted magic bytes)Hidden canvas area extraction (beyond visible dimensions)

$ ls tags/ techniques/

steganography green_channel frame_extraction gif animated_gif corrupted_header resolution_mismatch hidden_canvas image_forensics

Color channel separation (green channel)Frame-by-frame resolution analysisGIF header repair (corrupted magic bytes)Hidden canvas area extraction (beyond visible dimensions)

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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