(also known as 630.zip ) is a digital forensics and steganography challenge often featured in CTF (Capture The Flag) competitions. The primary objective is to extract a hidden "flag" or password from a ZIP archive that appears empty, corrupted, or otherwise unreadable by standard decompression tools. Challenge Overview
Use a hex editor (like HxD or xxd in Linux) to inspect the file's structure. Check for standard ZIP magic numbers: 50 4B 03 04 : Local file header. 50 4B 01 02 : Central directory file header. 50 4B 05 06 : End of central directory record (EoCD). 630zip
Provides a detailed breakdown of the ZIP structure to identify exactly where headers are broken. (also known as 630
Checks for metadata or comments that might contain the flag or password. Check for standard ZIP magic numbers: 50 4B