Capture The Flag Solution: reversing the password

This write-up documents a CTF challenge where a hex-encoded JSON blob contained every fourth byte corrupted by an inverted MSB; the author explains how to fix the bytes, recover the JSON (including username "bcollin"), extract 16-byte MD5 digests for old and new passwords, reverse the digests and lookup the plaintexts (p4ssw0rd and thisiscrazy), and verify the timestamp. The post is an educational/CTF solution walkthrough and not a report of an active breach or malware.