Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->Account Management->Security Group Management->EventID 4764 - A group's type was changed.
EventID 4764 - A group's type was changed.
Indicates that type or/and scope of "target" group was successfully changed by "caller" user.

Note: This event occurs only on Domain Controllers.

There are two types of groups in Active Directory:
  • Distribution, or in other words security disabled, groups are for distribution lists in Exchange and cannot be assigned permissions or rights.
  • Security, or security enabled, groups can be used for assigning permissions, rights and as distribution lists.
There are 3 scopes of groups in Active Directory: Local, Global, Universal. Scope identifies the extent to which the group is applied in the domain tree or forest.

See Microsoft Technet article for more details on group types and scopes.

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 8:29:34 PM
Event ID:      4764
Task Category: Security Group Management
Level:         Information
Keywords:      Audit Success
User:          N/A
Computer:      dcc1.Logistics.corp
Description:   
A group's type was changed.
Subject:
	Security ID:		S-1-5-21-1135140816-2109348461-2107143693-500
	Account Name:		ALebovsky
	Account Domain:		LOGISTICS
	Logon ID:		0x2a88a
Change Type:			Security Enabled Local Group Changed to Security Enabled Universal Group.
Group:
	Security ID:		S-1-5-21-1135140816-2109348461-2107143693-1146
	Group Name:		Setup Operators
	Group Domain:		LOGISTICS
Additional Information:
	Privileges:		-
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 Account Management
Source Microsoft-Windows-Security-Auditing
TaskCategory Security Group Management
EventId 4764
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 -
Subject: Account Name Name of the account that initiated the action. InsertionString6 ALebovsky
Subject: Account Domain Name of the domain that account initiating the action belongs to. InsertionString7 LOGISTICS
Subject: Logon ID A number uniquely identifying the logon session of the user initiating action. This number can be used to correlate all user actions within one logon session. InsertionString8 0x2a88a
Subject: Security ID Security ID of the account that performed the action. Usually resolved to Domain\Name in home environment. InsertionString5 S-1-5-21-1135140816-2109348461-2107143693-500
Additional Information: Privileges Likely always equal to "-". Probably reserved to indicate privileges used by Subject while performing the management action or the privileges assigned to the managed group. InsertionString9 -
Change Type The old and new values of the group type and scope. InsertionString1 Security Enabled Local Group Changed to Security Enabled Universal Group.
Group: Security ID Security ID of the managed group. InsertionString4 S-1-5-21-1135140816-2109348461-2107143693-1146
Group: Group Name Name of the managed group. InsertionString2 Setup Operators
Group: Group Domain Name of the domain that managed group belongs to. InsertionString3 LOGISTICS
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