The Talos Thanatos Decryptor is an open-source utility that attempts to decrypt files that were encrypted by the Thanatos ransomware. The Thanatos malware encrypts a user's files and discards the key, despite displaying a ransom note indicating that the files will be restored once the ransom is paid. Due to a flaw in the way the encryption keys are generated, though, they can be guessed in several minutes under the right conditions. The Thanatos Decryptor attempts to guess the key and use it to automatically restore files that the malware encrypted.