Prometheus—a ransomware build based on Thanos that locked up victims’ computers in the summer of 2021—included a major “vulnerability” that led security researchers at IBM to try and build a one-size-fits-all ransomware decryptor that could work against multiple ransomware variants, including Prometheus, AtomSilo, LockFile, Bandana, Chaos, and PartyTicket. Though the IBM researchers managed to undo the work of multiple ransomware variants, the panacea dream decryptor never materialized.

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