Techniques › T1556.002 › AN1303
AN1303 Analytic 1303
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects suspicious registration of new password filter DLLs into the authentication process. Correlates registry modifications to LSASS Notification Packages with subsequent DLL creation and loading events. Observes anomalous file placement of DLLs in system directories followed by LSASS loading the new filter during logon/password change activity.</p>
- Detects
- T1556.002 Password Filter DLL
- Part of
- DET0472 Detect Malicious Password Filter DLL Registration
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| WinEventLog:Security | EventCode=4657 | DC0063 Windows Registry Key Modification |
| WinEventLog:Sysmon | EventCode=11 | DC0039 File Creation |
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
RegistryPath | Specific registry path monitored for modification (e.g., HKLM\SYSTEM\CurrentControlSet\Control\Lsa\Notification Packages). |
AllowedDLLs | Known and approved password filter DLLs; deviations from baseline may indicate malicious injection. |
TimeWindow | Time window for correlating registry modification, file creation, and module load events. |
FilePathPatterns | Expected directories for legitimate password filter DLLs; anomalous paths may signal compromise. |