Base64

A multi-layered PowerShell one-liner used string format tricks, base64 encoding, char arrays, and a rolling XOR cipher to hide a registry write command. Peeling back each layer statically revealed the full registry key.

A follow-up CyberCorp challenge combined Morse code audio, Base64 encoding, and a Vigenère cipher. Decoding each layer in sequence with CyberChef and an online Morse decoder recovered the flag.