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Threat actorRussiaTracked since 2026-02

GlassWorm Operators

Also known as:GlassWormGlassWorm v2OpenVSX Sleeper Crew

As of 2026-05-30, GlassWorm Operators is a Russia-nexus threat actor tracked by Threadlinqs Intelligence across 3 threats spanning supply chain, malware. Also known as GlassWorm, GlassWorm v2, OpenVSX Sleeper Crew. ATT&CK coverage spans 56 techniques across 11 tactics in 3 of 3 tracked threats. Most-observed techniques: T1027 (Obfuscated Files or Information), T1041 (Exfiltration Over C2 Channel), T1195 (Supply Chain Compromise).

Tracked threats
31 critical · 2 high
First seen
2026-02-02
Last seen
2026-05-27
ATT&CK techniques
56across 3 of 3 threats
Related CVEs
0None referenced
Attribution
RussiaNation or origin
Nation: Russia · 3 tracked threat(s) · Categories: SUPPLY_CHAIN, MALWARE

Activity timeline

GlassWorm Operators appears in 3 tracked threats between and ; the busiest month was 2026-02 with 1 report.

ATT&CK techniques observed

56 techniques observed across 3 of 3 tracked threats · Stealth (formerly Defense Evasion) (9), Command and Control (8), Credential Access (8), Discovery (6), Execution (6), Persistence (5)
  • T1027 Obfuscated Files or Information — Stealth (formerly Defense Evasion)observed in 3 of 3 tracked threats
  • T1041 Exfiltration Over C2 Channel — Exfiltrationobserved in 3 of 3 tracked threats
  • T1195 Supply Chain Compromise — Initial Accessobserved in 3 of 3 tracked threats
  • T1005 Data from Local System — Collectionobserved in 2 of 3 tracked threats
  • T1027.013 Encrypted/Encoded File — Stealth (formerly Defense Evasion)observed in 2 of 3 tracked threats
  • T1059.007 JavaScript — Executionobserved in 2 of 3 tracked threats
  • T1071.001 Web Protocols — Command and Controlobserved in 2 of 3 tracked threats
  • T1082 System Information Discovery — Discoveryobserved in 2 of 3 tracked threats
  • T1083 File and Directory Discovery — Discoveryobserved in 2 of 3 tracked threats
  • T1102.001 Dead Drop Resolver — Command and Controlobserved in 2 of 3 tracked threats
  • T1102.002 Bidirectional Communication — Command and Controlobserved in 2 of 3 tracked threats
  • T1105 Ingress Tool Transfer — Command and Controlobserved in 2 of 3 tracked threats
  • T1176 Software Extensions — Persistenceobserved in 2 of 3 tracked threats
  • T1195.002 Compromise Software Supply Chain — Initial Accessobserved in 2 of 3 tracked threats
  • T1199 Trusted Relationship — Initial Accessobserved in 2 of 3 tracked threats

Tracked threats