Malicious LSA Password Filter Registration via Notification Packages

ATT&CK techniques

Persistence → Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1556.002Password Filter DLL
Priv Esc
Defense Evasion
- T1556.002Password Filter DLL
Cred Access
- T1556.002Password Filter DLL
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects modification of the LSA Notification Packages registry value to register a rogue password filter DLL such as sasetup.dll. Operation FishMedley abused this mechanism to capture plaintext passwords during password change events via the PasswordChangeNotify export. Password filters run inside LSASS and let attackers persistently intercept credentials as users change them.

Reporting behind it

Related detections4 linkedT1556.002 — drag to rearrange

Malicious Ntospy Network Provider DLL Registration for Credential Capture

Windows Process Creation: Suspicious secedit.exe Security Policy Export or Configuration

Windows PowerShell Copies a DLL into System32 or SysWOW64

Windows Credential Access via Reg Add in LSA Registry Paths

Malicious LSA Password Filter Registration via Notification Packages

Pivot detection · T1556.002 · 4 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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