Suspicious COM Hijack of ClickOnce Deployment Service CLSID (via registry_set)

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1546.015Component Object Model Hijacking
Priv Esc
- T1546.015Component Object Model Hijacking
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects hijacking of the ClickOnce deployment service COM object by registering a LocalServer32 or InprocServer32 handler under its CLSID in the current user hive. Attackers point this CLSID at an attacker-controlled executable or DLL so that dfsvc activation launches their code. Per-user registration of this specific CLSID is a strong COM-hijack indicator.

Reporting behind it

Related detections9 linkedT1546.015 — drag to rearrange

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Malicious COM Hijack of PSFactoryBuffer InprocServer32

Malicious APT-C-60 COM Hijack via SpyGlace CLSID InProcServer32 (via registry_set)

Malicious COM Hijack via CLSID InProcServer32 Registry Modification (via registry_set)

Malicious COM Object Hijack Pointing to a User-Writable DLL (via registry_set)

Malicious COM Object Hijack Pointing to IconCache DLL

Suspicious COM Hijack of ClickOnce Deployment Service CLSID (via registry_set)

Pivot detection · T1546.015 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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