misceasy
Мозаика (Mosaic)
hackerlab
Task: a PNG image contains a QR code rendered with circular dots, split into 4 quadrants and rearranged (one quadrant rotated 180°). Solution: identify cut lines between finder patterns, rearrange quadrants to restore valid QR layout, decode to get base64-encoded password-protected ZIP, crack with john to extract flag.
$ ls tags/ techniques/
quadrant_rearrangementimage_rotation_180qr_reassemblybase64_to_zipzip2john_cracking
🔒
Permission denied (requires tier.pro)
Sign in to access full writeups
Create a free account with GitHub to get started.
$ssh [email protected]