Malicious Password Filter Registration via LSA Notification Packages
- Product
- windows
- Category
- registry_set
- Author
- HuntRule
- Published
- 2026-10-15
- Updated
- 2026-10-15
ATT&CK techniques
Persistence → Cred AccessRecon
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 registration of a rogue password filter DLL named passms in the LSA Notification Packages registry value, seen in a stealthy third-party supply chain intrusion. A malicious password filter receives every password change in cleartext, giving the attacker durable credential access across the domain.
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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