Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->Policy Change->Authorization Policy Change->EventID 4704 - A user right was assigned.
EventID 4704 - A user right was assigned.
This event record indicates that a specific right was successfully assigned to the identified user on the computer where event was logged.

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:
Windows 2000, 2003
 Sample: 
Log Name:      Security
Source:        Microsoft-Windows-Security-Auditing
Date:          10/28/2009 8:31:00 PM
Event ID:      4704
Task Category: Authorization Policy Change
Level:         Information
Keywords:      Audit Success
User:          N/A
Computer:      dcc1.Logistics.corp
Description:   
A user right was assigned.
Subject:
	Security ID:		S-1-5-21-1135140816-2109348461-2107143693-500
	Account Name:		ALebovsky
	Account Domain:		LOGISTICS
	Logon ID:		0x2a88a
Target Account:
	Account Name:		S-1-5-21-1135140816-2109348461-2107143693-1145
New Right:
	User Right:		SeTcbPrivilege
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 Authorization Policy Change
EventId 4704
Field Matching
FieldDescriptionStored inSample Value
DateTime Date/Time of event origination in GMT format. DateTime 10.10.2000 19:00:00
Source Name of an Application or System Service originating the event. Source Security
Type Warning, Information, Error, Success, Failure, etc. Type Success
User Domain\Account name of user/service/computer initiating event. User RESEARCH\Alebovsky
Computer Name of server workstation where event was logged. Computer DC1
EventID Numerical ID of event. Unique within one Event Source. EventId 576
Description The entire unparsed event message. Description Special privileges assigned to new logon.
Log Name The name of the event log (e.g. Application, Security, System, etc.) LogName Security
Task Category A name for a subclass of events within the same Event Source. TaskCategory
Level Warning, Information, Error, etc. Level
Keywords Audit Success, Audit Failure, Classic, Connection etc. Keywords
Category A name for an aggergative event class, corresponding to the similar ones present in Windows 2003 version. Category Account Logon
Object Name -
Whom -
Object Type -
Class Name -
Security ID -
Account Name -
Account Domain -
Target Account: Account Name InsertionString5 S-1-5-21-1135140816-2109348461-2107143693-1145
New Right: User Right InsertionString6 SeTcbPrivilege
Subject: Security ID InsertionString1
Subject: Account Name InsertionString2 ALebovsky
Subject: Account Domain InsertionString3 LOGISTICS
Subject: Logon ID InsertionString4 0x2a88a
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