Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->Account Management->Application Group Management->EventID 4787 - A non-member was added to a basic application group.
EventID 4787 - A non-member was added to a basic application group.
An application group is a group of users, computers, or other security principals. An application group is not a group of applications.

Find more information about this event  on ultimatewindowssecurity.com.
 Sample: 
      A non-member was added to a basic application group.

      Subject:
      Security ID:		%6
      Account Name:		%7
      Account Domain:		%8
      Logon ID:		%9

      Member:
      Security ID:		%2
      Account Name:		%1

      Group:
      Security ID:		%5
      Account Name:		%3
      Account Domain:		%4

      Additional Information:
      Privileges:		%10

      A non-member is an account that is explicitly excluded from membership in a basic application group.  
      Even if the account is specified as a member of the application group, either explicitly or through nested group membership, 
      the account will not be treated as a group member if it is listed as a non-member.
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 Application Group Management
EventId 4787
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. InsertionString7 ALebovsky
Subject: Account Domain Name of the domain that account initiating the action belongs to. InsertionString8 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. InsertionString9 0x2a88a
Subject: Security ID Security ID of the account that performed the action. Usually resolved to Domain\Name in home environment. InsertionString6
Group: Security ID Security ID of the managed group. Usually resolved to Domain\GroupName in home environment. InsertionString5
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. InsertionString10
Member: Security ID InsertionString2
Member: Account Name InsertionString1
Group: Account Name InsertionString3
Group: Account Domain InsertionString4
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