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Meduza Stealer is a cybercriminal malware operation centered on the development and sale of the Meduza infostealer, a malware-as-a-service offering that emerged in 2023. The group has marketed access to the stealer through Russian-language criminal forums and Telegram-based channels. Meduza is designed to harvest personal, financial, and system data from infected hosts, including browser-stored information, cryptocurrency wallet data, Windows credential material, environment details, installed software inventories, and selected files for theft. The malware is also associated with a management panel and encrypted logging, indicating an organized service model for operators and customers. The group’s activity is linked to credential theft and broader data exfiltration operations rather than ransomware. Reported victimology includes attacks in Russia, Ukraine, and Poland, and at least one intrusion affecting a Russian government network in Astrakhan region. Russian authorities reportedly arrested three individuals in the Moscow metropolitan area accused of creating and selling the malware. The case is notable because domestic enforcement against Russian cybercriminal operators is relatively uncommon and appears to have followed use of the malware against a Russian government target. Known aliases include meduza_stealer and meduza_stealer_group. Based on the available facts, the actor is best characterized as a financially motivated cybercrime group focused on infostealer distribution and theft of credentials and other valuable data.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
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Attributed origin per open-source reporting.
2 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
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Cybercriminal group developing and distributing the Meduza stealer malware, used for stealing credentials, cryptocurrency wallet data, and personal information from victims worldwide.
The Meduza Stealer group is responsible for creating and selling the Meduza infostealer malware, which has been used in attacks against government networks.
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Every observed MITRE ATT&CK technique, grouped by tactic.
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