A member was removed from a security-enabled universal group
A user, group, or computer was removed from an AD Universal Security Group (`Enterprise Admins`, etc.).
Event ID 4757 records account removal from universal security groups (such as `Enterprise Admins` or `Schema Admins`). Essential for tracking temporary membership injection when correlated with `4756` (`Member added to universal group`).
Failure Reason / Root Cause:
Removal of `MemberName` from universal group `TargetUserName` by `SubjectUserName`.
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>4757</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>12544</Task>
<Opcode>0</Opcode>
<Keywords>0x8020000000000000</Keywords>
<TimeCreated SystemTime="2026-07-17T09:54:44.904Z" />
<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 member was removed from a security-enabled universal group -->
</EventData>
</Event>MITRE ATT&CK mapping
| ID | Technique | Tactic |
|---|---|---|
T1098 | Account Manipulation: Domain Groups | Persistence |
Recommended actions
- Correlate with `4756` additions to verify whether temporary forest-admin privileges were exercised.