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Threat actorTracked since 2026-07

Claude "Mythos 5"

Also known as:Claude Mythos 5

As of 2026-08-05, Claude "Mythos 5" is a threat actor tracked by Threadlinqs Intelligence across 2 threats spanning supply chain. Also known as Claude Mythos 5. ATT&CK coverage spans 28 techniques across 11 tactics in 2 of 2 tracked threats. Most-observed techniques: T1059 (Command and Scripting Interpreter), T1078 (Valid Accounts), T1119 (Automated Collection).

Tracked threats
21 critical · 1 high
First seen
2026-07-31
Last seen
2026-08-04
ATT&CK techniques
28across 2 of 2 threats
Related CVEs
0None referenced
2 tracked threat(s) · Categories: SUPPLY_CHAIN

Activity timeline

Claude "Mythos 5" appears in 2 tracked threats between and ; the busiest month was 2026-07 with 1 report.

ATT&CK techniques observed

28 techniques observed across 2 of 2 tracked threats · Resource Development (5), Initial Access (4), Stealth (formerly Defense Evasion) (4), Collection (3), Credential Access (3), Exfiltration (3)
  • T1059 Command and Scripting Interpreter — Executionobserved in 2 of 2 tracked threats
  • T1078 Valid Accounts — Initial Accessobserved in 2 of 2 tracked threats
  • T1119 Automated Collection — Collectionobserved in 2 of 2 tracked threats
  • T1195 Supply Chain Compromise — Initial Accessobserved in 2 of 2 tracked threats
  • T1585 Establish Accounts — Resource Developmentobserved in 2 of 2 tracked threats
  • T1608 Stage Capabilities — Resource Developmentobserved in 2 of 2 tracked threats
  • T1005 Data from Local System — Collectionobserved in 1 of 2 tracked threats
  • T1020 Automated Exfiltration — Exfiltrationobserved in 1 of 2 tracked threats
  • T1021 Remote Services — Lateral Movementobserved in 1 of 2 tracked threats
  • T1027 Obfuscated Files or Information — Stealth (formerly Defense Evasion)observed in 1 of 2 tracked threats
  • T1036 Masquerading — Stealth (formerly Defense Evasion)observed in 1 of 2 tracked threats
  • T1041 Exfiltration Over C2 Channel — Exfiltrationobserved in 1 of 2 tracked threats
  • T1082 System Information Discovery — Discoveryobserved in 1 of 2 tracked threats
  • T1110 Brute Force — Credential Accessobserved in 1 of 2 tracked threats
  • T1140 Deobfuscate/Decode Files or Information — Stealth (formerly Defense Evasion)observed in 1 of 2 tracked threats

Tracked threats