MCDecryptor, specifically identified as MCDecryptor.exe, is frequently flagged by automated sandboxes as a malicious ransomware or banking threat rather than a legitimate tool. Analysis indicates this executable often functions as a malicious payload, disguised as a decryption utility to compromise user systems. Detailed technical reports are available at Hybrid Analysis.

• Header (8 bytes): ASCII magic "MCDEC01\n" (for identification).
• Nonce (12 bytes): GCM nonce.
• Ciphertext (variable): encrypted plaintext.
• Tag (16 bytes): GCM authentication tag appended after ciphertext.

Disclaimer: The author and publisher of this article do not condone using MCDeCryptor for griefing, stealing builds, or accessing password-protected areas without consent. Use this tool responsibly.

Note: As of 2023, Mojang fully migrated to Microsoft accounts. MCDecryptor only works on pre-migration profiles (Mojang accounts) and is provided for archival/forensic use.