An anonymous reader writes: Ransomware comes in various forms, and not all ransomware encrypts files — some just block computers until the ransom is paid. When the file encryption feature is included, the encryption key is usually sent to the malware's C&C server, which is controlled by the crooks — but not always. Researchers have recently analyzed a crypto-ransomware sample that demonstrated an alternative method of encrypting files and delivering the key (i.e., the information required to discover the right key) to the criminal behind the scheme — it doesn't need to contact a C&C to receive an encryption key or to send it to the crook.
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