A privileged service was called
A process requested and exercised a sensitive privilege (e.g., `SeBackupPrivilege`, `SeTcbPrivilege`).
Event ID 4673 records when specific high-impact privileges (`SeBackupPrivilege`, `SeRestorePrivilege`, `SeSecurityPrivilege`, `SeTakeOwnershipPrivilege`) are exercised by a running process. For example, exercising `SeBackupPrivilege` enables reading any file on the system regardless of NTFS permissions, commonly used to exfiltrate `NTDS.dit`.
Failure Reason / Root Cause:
Sensitive token privilege exercised during API call (`PrivilegeList`).
Raw Event XML snippet
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Security-Auditing" Guid="{54849625-5478-4994-A5BA-3E3B0328C30D}" />
<EventID>4673</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>12544</Task>
<Opcode>0</Opcode>
<Keywords>0x8020000000000000</Keywords>
<TimeCreated SystemTime="2026-07-17T09:54:44.875Z" />
<EventRecordID>1048576</EventRecordID>
<Correlation />
<Execution ProcessID="612" ThreadID="1024" />
<Channel>Security</Channel>
<Computer>DC01.enterprise.internal</Computer>
<Security />
</System>
<EventData>
<Data Name="SubjectUserSid">S-1-5-18</Data>
<Data Name="SubjectUserName">SYSTEM</Data>
<Data Name="SubjectDomainName">NT AUTHORITY</Data>
<Data Name="SubjectLogonId">0x3e7</Data>
<!-- Event telemetry fields specific to A privileged service was called -->
</EventData>
</Event>MITRE ATT&CK mapping
| ID | Technique | Tactic |
|---|---|---|
T1003.003 | NTDS | Credential Access |
T1134 | Access Token Manipulation | Privilege Escalation |
Recommended actions
- Inspect `PrivilegeList` and `ProcessName` immediately. If `SeBackupPrivilege` is exercised by non-backup binaries (e.g., `cmd.exe`, `powershell.exe`, or unknown tools), treat as an active credential dumping attempt.