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ATT&CK techniqueImpact

T1491.002 External Defacement

ImpactEnterpriseSub-technique

As of 2026-10-05, T1491.002 (External Defacement) appears in 24 tracked threats, first reported 2026-02-21 and most recently 2026-09-28, with linked actors including ShinyHunters, NoName057(16), APT44; it most often appears alongside T1005 (Data from Local System).

Tracked threats
2412 critical, 8 high, 3 medium
First seen
2026-02-21
Last seen
2026-09-28
Threat actors
8In the threats using it
Detection rules
23Blue tier and above

Data as of:

Activity timeline

T1491.002 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 11 reports, and 24 of the 24 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1491.002 External Defacement is catalogued by MITRE ATT&CK under the Impact tactic in the Enterprise matrix, as a sub-technique of T1491 Defacement. Threadlinqs maps 24 of 2623 tracked threats (0.9%) to it; by severity that is 12 critical, 8 high, 3 medium.

Threats that use T1491.002 most often also use T1005 Data from Local System (16 threats), T1190 Exploit Public-Facing Application (16 threats), T1071.001 Web Protocols (15 threats), T1059 Command and Scripting Interpreter (13 threats), T1505.003 Web Shell (13 threats). These are the techniques an intrusion set tends to chain with it, so they are the natural next places to look when it is observed.

8 tracked threat actors appear in the threats that use T1491.002; the most frequent are ShinyHunters (6), NoName057(16) (2), APT44 (1), Handala Hack (1), Handala Hack Team (1).

Mitigations

MITRE ATT&CK lists 1 mitigation for T1491.002.

Data sources

Telemetry that can reveal T1491.002, per MITRE ATT&CK.

  • Application Log — Application Log Content
  • File — File Creation, File Modification
  • Network Traffic — Network Traffic Content

Threat actors using it

Tracked threats

24 tracked threats use T1491.002.

Detection coverage

Threadlinqs maintains 23 detection rules mapped to T1491.002 (SPL 3, KQL 9, Sigma 11). Rule content is available to Blue tier accounts and above; this page shows counts only.

23 detection rules (SPL/KQL/Sigma) · Blue and above. Compare plans

Parent technique

T1491 Defacement — 73 tracked threats at the technique level.