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Rhadamanthys is an infostealer malware operation associated with large-scale theft of sensitive data from infected devices worldwide. It has been identified as a prolific cybercriminal threat and was disrupted during Operation Endgame, a coordinated international law-enforcement action that targeted major malware ecosystems and resulted in the takedown of substantial supporting infrastructure and the arrest of a suspect linked to the operation. The activity is consistent with financially motivated cybercrime centered on credential and data theft followed by exfiltration. Known aliases reflected in reporting include rhadamanthys_infostealer and rhadamanthys_infostealer_operators.
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Operators of the Rhadamanthys infostealer used the malware to infect devices worldwide and steal sensitive data, supporting various cybercrime groups.
Rhadamanthys infostealer is a malware family that was targeted and disrupted by a major law enforcement operation in November 2025.
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