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ATT&CK techniqueImpact

T1499 Endpoint Denial of Service

ImpactEnterprise

As of 2026-10-05, T1499 (Endpoint Denial of Service) appears in 127 tracked threats, first reported 2021-11-25 and most recently 2026-10-04, with linked actors including ClickLock Dev, APT28, APT33; it most often appears alongside T1190 (Exploit Public-Facing Application).

Tracked threats
12756 critical, 55 high, 14 medium
First seen
2021-11-25
Last seen
2026-10-04
Threat actors
27In the threats using it
Detection rules
118Blue tier and above

Data as of:

Activity timeline

T1499 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 61 reports, and 126 of the 127 threats were reported in the twelve months to 2026-10.

How adversaries use it

T1499 Endpoint Denial of Service is catalogued by MITRE ATT&CK under the Impact tactic in the Enterprise matrix. Threadlinqs maps 127 of 2623 tracked threats (4.8%) to it; by severity that is 56 critical, 55 high, 14 medium.

Threats that use T1499 most often also use T1190 Exploit Public-Facing Application (93 threats), T1068 Exploitation for Privilege Escalation (81 threats), T1059 Command and Scripting Interpreter (74 threats), T1005 Data from Local System (68 threats), T1203 Exploitation for Client Execution (67 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.

27 tracked threat actors appear in the threats that use T1499; the most frequent are ClickLock Dev (2), APT28 (1), APT33 (1), APT34 (1), APT35 (1).

Mitigations

MITRE ATT&CK lists 1 mitigation for T1499.

Data sources

Telemetry that can reveal T1499, per MITRE ATT&CK.

  • Application Log — Application Log Content
  • Network Traffic — Network Traffic Content, Network Traffic Flow
  • Sensor Health — Host Status

Threat actors using it

Tracked threats

The 30 most recent of 127 tracked threats that use T1499.

Detection coverage

Threadlinqs maintains 118 detection rules mapped to T1499 (SPL 38, KQL 36, Sigma 44). Rule content is available to Blue tier accounts and above; this page shows counts only.

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

Sub-techniques