Techniques › T1556.001 › AN0757
AN0757 Analytic 0757
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects anomalous process access to LSASS on domain controllers, suspicious module loads of authentication DLLs, and registry or file modifications indicative of Skeleton Key–style patching. Correlates LSASS access attempts with subsequent abnormal logon activity patterns.</p>
- Detects
- T1556.001 Domain Controller Authentication
- Part of
- DET0271 Detect Domain Controller Authentication Process Modification (Skeleton Key)
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:Sysmon | EventCode=10 | DC0035 Process Access |
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
| WinEventLog:Security | EventCode=4624, 4648 | DC0067 Logon Session Creation |
| WinEventLog:System | Unexpected modification to lsass.exe or cryptdll.dll | DC0061 File Modification |
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 |
|---|---|
MonitoredDLLs | Specific authentication DLLs such as cryptdll.dll and samsrv.dll monitored for tampering. |
TimeWindow | Correlation window between LSASS memory access, module load, and suspicious logons. |
UserContext | Baseline expected accounts performing domain controller logon operations. |