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Meduza is an infostealer threat actor or malware operation associated with credential theft and data exfiltration activity. It has been identified as a customer of Russian bulletproof hosting services, including infrastructure linked to Aeza Group, indicating reliance on abuse-resistant hosting to sustain malicious operations and evade disruption. Meduza has been linked to campaigns targeting the U.S. defense industrial base and technology companies. The operation is associated with the broader infostealer ecosystem, which typically focuses on harvesting credentials, browser data, session tokens, and other sensitive information from compromised systems for follow-on fraud, intrusion enablement, or resale. Its use of bulletproof hosting suggests operational dependence on resilient infrastructure that can support malware delivery, command-and-control, staging, and rapid migration when providers face sanctions or takedown pressure. No widely used alternate alias is established in the available information beyond Meduza. High-confidence reporting supports describing Meduza as a cybercriminal infostealer operation rather than a nation-state intrusion set, although its activity has affected strategically significant sectors.
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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.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
1 distinct technique observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Infostealer operator hosted by Aeza Group and linked in the article to attacks on the U.S. defense-industrial base and technology companies.
Meduza is a cybercriminal group that distributes ransomware and malware, utilizing bulletproof hosting services such as those provided by Aeza Group.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.