Threadlinqs IntelligenceStart free

ATT&CK techniquePrivilege EscalationStealth (formerly Defense Evasion)

T1055.012 Process Hollowing

Privilege EscalationStealth (formerly Defense Evasion)EnterpriseSub-technique

As of 2026-10-05, T1055.012 (Process Hollowing) appears in 51 tracked threats, first reported 2026-02-23 and most recently 2026-09-30, with linked actors including APT37, Earth Lamia, GrayBravo; it most often appears alongside T1071.001 (Web Protocols).

Tracked threats
511 critical, 43 high, 7 medium
First seen
2026-02-23
Last seen
2026-09-30
Threat actors
9In the threats using it
Detection rules
135Blue tier and above

Data as of:

Activity timeline

T1055.012 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-09 with 17 reports, and 51 of the 51 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1055.012 Process Hollowing 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 51 of 2623 tracked threats (1.9%) to it; by severity that is 1 critical, 43 high, 7 medium.

Threats that use T1055.012 most often also use T1071.001 Web Protocols (34 threats), T1140 Deobfuscate/Decode Files or Information (33 threats), T1027 Obfuscated Files or Information (32 threats), T1082 System Information Discovery (32 threats), T1204.002 Malicious File (31 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.

9 tracked threat actors appear in the threats that use T1055.012; the most frequent are APT37 (1), Earth Lamia (1), GrayBravo (1), Konni APT (1), Mustang Panda (1).

Mitigations

MITRE ATT&CK lists 1 mitigation for T1055.012.

Data sources

Telemetry that can reveal T1055.012, per MITRE ATT&CK.

  • Process — OS API Execution, Process Access, Process Creation, Process Modification

Threat actors using it

Tracked threats

The 30 most recent of 51 tracked threats that use T1055.012.

Detection coverage

Threadlinqs maintains 135 detection rules mapped to T1055.012 (SPL 48, KQL 49, Sigma 38). Rule content is available to Blue tier accounts and above; this page shows counts only.

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

Parent technique

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