Malicious COM Object Hijack Pointing to IconCache DLL

PremiumReviewedSigma · High · v1
Product
windows
Category
registry_set
Author
HuntRule
Published
2026-06-07
Updated
2026-08-28

ATT&CK techniques

Persistence → Priv Esc
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Defense Evasion

  6. Cred Access

  7. Discovery

  8. Lateral Movement

  9. Collection

  10. C2

  11. Exfiltration

  12. Impact

What it detects

This rule detects a COM object InProcServer32 registration whose default value references an iconcache prefixed DLL in the Explorer directory. Operation ForumTroll established persistence via a COM hijack under HKCR CLSID InProcServer32 pointing at its payload DLL as documented by Kaspersky. This combination of a COM handler mapped to a masquerading DLL path indicates stealthy persistence and defense evasion.

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Malicious COM Object Hijack Pointing to IconCache DLL
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.