Karmen Ransomware Variant Introduced by Russian Hacker: "The Karmen malware derived from “Hidden Tear,” an open source ransomware project, available for purchase by anyone. As is typical for ransomware infections, Karmen encrypts files on the infected machine using the strong AES-256 encryption protocol, making them inaccessible to the user and may trigger a ransom note or instructions demanding that the user pay a large sum of money to obtain the decryption key from the attacker."