Event Details
User Activity->Policy Changes->Windows 2008->EventID 4908 - Special Groups Logon table modified.
EventID 4908 - Special Groups Logon table modified.
 Sample: 
        Special Groups Logon table modified.

        Special Groups:	%1

        This event is generated when the list of special groups is updated in the registry or through security policy. The updated list of special groups is indicated in the event.
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows Vista (2008)
Windows 7 (2008 R2)
Windows 8 (2012)
Windows 8.1 (2012 R2)
Windows 10 (2016)
Category Policy Change
Source Microsoft-Windows-Security-Auditing
TaskCategory Audit Policy Change
EventId 4908
Field Matching
FieldDescriptionStored inSample Value
When At what date and time a user activity originated in the system. DateTime
Who Account or user name under which the activity occured. User
What The type of activity occurred (e.g. Logon, Password Changed, etc.) "Policy Change" Policy Change
Where The name of the workstation/server where the activity was logged. Computer
Where From The name of the workstation/server where the activity was initiated from. - 10.10.10.10
Severity Specify the seriousness of the event. "High" High
WhoDomain -
WhereDomain -
Policy Name The name of the affected policy. -
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