Suspicious Root Certificate Installation via certutil (via process_creation)
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-10-02
- Updated
- 2026-10-02
ATT&CK techniques
Defense EvasionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects BlotchyQuasar installing an attacker root certificate into the enterprise trust store with certutil to enable interception of banking sessions. The addstore enterprise root combination applied to a dropped certificate file is a hallmark of trust subversion. Endpoints rarely add enterprise root certificates this way.
Reporting behind it
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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