Decrypt C77L Ransomware

C77L (aka X77C) is a Win64 ransomware family that appends attacker email + an 8-hex “Decryption ID”/volume serial to filenames (examples: .[nullhex@2mail.co].8AA60918, .[ID-80587FD8][Dm_for_decrypt@protonmail.com].3yk). It uses hybrid crypto (AES for file content + RSA to protect keys), drops ransom notes such as #Restore-My-Files.txt, and threatens to leak stolen data. Related article: How to remove BQTLOCK Ransomware…