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ATT&CK techniquePrivilege EscalationStealth (formerly Defense Evasion)

T1055.001 Dynamic-link Library Injection

Privilege EscalationStealth (formerly Defense Evasion)EnterpriseSub-technique

As of 2026-10-05, T1055.001 (Dynamic-link Library Injection) appears in 25 tracked threats, first reported 2021-11-25 and most recently 2026-09-26, with linked actors including APT38, Andariel, Lazarus Group; it most often appears alongside T1027 (Obfuscated Files or Information).

Tracked threats
255 critical, 15 high, 5 medium
First seen
2021-11-25
Last seen
2026-09-26
Threat actors
15In the threats using it
Detection rules
56Blue tier and above

Data as of:

Activity timeline

T1055.001 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 7 reports, and 24 of the 25 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1055.001 Dynamic-link Library Injection is catalogued by MITRE ATT&CK under the Privilege Escalation and Stealth (formerly Defense Evasion) tactics in the Enterprise matrix, as a sub-technique of T1055 Process Injection. Threadlinqs maps 25 of 2623 tracked threats (1%) to it; by severity that is 5 critical, 15 high, 5 medium.

Threats that use T1055.001 most often also use T1027 Obfuscated Files or Information (20 threats), T1071.001 Web Protocols (19 threats), T1082 System Information Discovery (18 threats), T1036.005 Match Legitimate Resource Name or Location (17 threats), T1140 Deobfuscate/Decode Files or Information (17 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.

15 tracked threat actors appear in the threats that use T1055.001; the most frequent are APT38 (2), Andariel (2), Lazarus Group (2), Sapphire Sleet (2), Stardust Chollima (2).

Mitigations

MITRE ATT&CK lists 1 mitigation for T1055.001.

Data sources

Telemetry that can reveal T1055.001, per MITRE ATT&CK.

  • Module — Module Load
  • Process — OS API Execution, Process Access, Process Metadata, Process Modification

Threat actors using it

Tracked threats

25 tracked threats use T1055.001.

Detection coverage

Threadlinqs maintains 56 detection rules mapped to T1055.001 (SPL 19, KQL 18, Sigma 19). Rule content is available to Blue tier accounts and above; this page shows counts only.

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

Parent technique

T1055 Process Injection — 269 tracked threats at the technique level.