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Threat actorTracked since 2026-07

MedusaLocker

As of 2026-09-18, MedusaLocker is a threat actor tracked by Threadlinqs Intelligence across 4 threats spanning threat intel, ransomware, ransomware hacktivism. ATT&CK coverage spans 61 techniques across 15 tactics in 4 of 4 tracked threats. Most-observed techniques: T1133 (External Remote Services), T1190 (Exploit Public-Facing Application), T1078 (Valid Accounts).

Tracked threats
43 high
First seen
2026-07-16
Last seen
2026-09-18
ATT&CK techniques
61across 4 of 4 threats
Related CVEs
4Referenced by its activity
4 tracked threat(s) · Categories: THREAT_INTEL, RANSOMWARE, RANSOMWARE_HACKTIVISM

Activity timeline

MedusaLocker appears in 4 tracked threats between and ; the busiest month was 2026-07 with 2 reports.

ATT&CK techniques observed

61 techniques observed across 4 of 4 tracked threats · Impact (9), Credential Access (7), Command and Control (6), Initial Access (5), Stealth (formerly Defense Evasion) (5), Exfiltration (4)
  • T1133 External Remote Services — Initial Accessobserved in 4 of 4 tracked threats
  • T1190 Exploit Public-Facing Application — Initial Accessobserved in 4 of 4 tracked threats
  • T1078 Valid Accounts — Initial Accessobserved in 3 of 4 tracked threats
  • T1490 Inhibit System Recovery — Impactobserved in 3 of 4 tracked threats
  • T1005 Data from Local System — Collectionobserved in 2 of 4 tracked threats
  • T1021 Remote Services — Lateral Movementobserved in 2 of 4 tracked threats
  • T1070 Indicator Removal — Stealth (formerly Defense Evasion)observed in 2 of 4 tracked threats
  • T1110 Brute Force — Credential Accessobserved in 2 of 4 tracked threats
  • T1486 Data Encrypted for Impact — Impactobserved in 2 of 4 tracked threats
  • T1555 Credentials from Password Stores — Credential Accessobserved in 2 of 4 tracked threats
  • T1566 Phishing — Initial Accessobserved in 2 of 4 tracked threats
  • T1567 Exfiltration Over Web Service — Exfiltrationobserved in 2 of 4 tracked threats
  • T1567.002 Exfiltration to Cloud Storage — Exfiltrationobserved in 2 of 4 tracked threats
  • T1685 Disable or Modify Tools — Defense Impairmentobserved in 2 of 4 tracked threats
  • T1003 OS Credential Dumping — Credential Accessobserved in 1 of 4 tracked threats

Tracked threats

Related CVEs

4 CVEs referenced by tracked MedusaLocker activity