Ransomware group operating Medusa RaaS since 2022, using double extortion and a public Tor-based leak site for victim data. This profile is mapped to MITRE ATT&CK G1051 and covers attribution, tooling, targeting, and defensive recommendations based on observed campaigns.
Overview & Attribution
Medusa Group (also tracked as None publicly documented) is a threat group attributed to Unknown. The group primarily targets Education, healthcare, manufacturing for intelligence collection and operational objectives aligned with state interests.
This group is tracked as G1051 in the MITRE ATT&CK framework. All techniques referenced in this report are mapped to ATT&CK for consistent threat modeling and detection engineering.
Arsenal & Tools
Known tools and malware associated with Medusa Group include:
- Medusa ransomware
- RMM tools
Targeting & Operations
Medusa Group operations focus on Education, healthcare, manufacturing. The group typically gains initial access through spear-phishing, exploitation of public-facing applications, or strategic web compromises before deploying custom implants for persistent access and data exfiltration.
Organizations in the Education sector should treat Medusa Group as a relevant threat and validate their detection coverage against the MITRE ATT&CK techniques listed below.
MITRE ATT&CK Mapping
Key techniques observed in Medusa Group operations:
| Technique ID | Technique Name | Tactical Context |
|---|---|---|
| T1486 | T1486 | Observed in Medusa Group campaigns |
| T1059.001 | T1059.001 | Observed in Medusa Group campaigns |
| T1078 | T1078 | Observed in Medusa Group campaigns |
| T1071.001 | T1071.001 | Observed in Medusa Group campaigns |
Full ATT&CK mapping: https://attack.mitre.org/groups/G1051/
Notable Campaigns
This threat group has been active in operations targeting Education, healthcare, manufacturing. Security researchers have documented campaigns involving Medusa ransomware and other tools deployed against organizations in multiple countries. Attribution confidence varies by campaign, but consistent infrastructure and TTP overlap links activity to Unknown-nexus operations.
Detection & Defense
Recommended defensive measures against Medusa Group:
- Network monitoring: Detect C2 beaconing patterns associated with Medusa ransomware and related implants
- Endpoint detection: Deploy behavioral rules for the ATT&CK techniques above, particularly T1486 and T1059.001
- Email security: Implement robust phishing defenses including URL sandboxing and attachment detonation
- Patch management: Prioritize patching of internet-facing applications exploited by this group
- Threat hunting: Proactively hunt for IOCs and behavioral indicators mapped to G1051 in MITRE ATT&CK
How Mjolnir Security Can Help
Defend Against Medusa Group
Mjolnir Security provides tailored threat intelligence, detection engineering, and incident response services to help organizations defend against Unknown-nexus threat actors.
Contact us: mjolnirsecurity.com
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