Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->DS Access->Directory Service Access->EventID 4661 - A handle to an object was requested. [2012 R2 and higher]
EventID 4661 - A handle to an object was requested. [2012 R2 and higher]
Indicates that an attempt was made to access a directory service object. Success or failure is indicated in the message. 

Note:
This event occurs only on Domain Controllers. 

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:

Windows 2000
Windows 2003
 Sample: 
A handle to an object was requested.
Subject :
	Security ID:		S-1-5-21-1135140816-2109348461-2107143693-500
	Account Name:		ALebovsky
	Account Domain:		LOGISTICS
	Logon ID:		0x2a88a
Object:
	Object Server:	Security Account Manager
	Object Type:	SAM_DOMAIN
	Object Name:	DC=Logistics,DC=corp
	Handle ID:	0x2dace0
Process Information:
	Process ID:	0x238
	Process Name:	C:\Windows\System32\lsass.exe
Access Request Information:
	Transaction ID:	{00000000-0000-0000-0000-000000000000}
	Accesses:	ListAccounts
			
	Access Reasons:		-
	Access Mask:	0x100
	Privileges Used for Access Check:	-
	Properties:	---
	{bf967a90-0de6-11d0-a285-00aa003049e2}
ListAccounts
		{280f369c-67c7-438e-ae98-1d46f3c6f541}
	Restricted SID Count:	0
===========================
Description template stored in adtschema.dll:
===========================
A handle to an object was requested.

Subject :
	Security ID:		%1
	Account Name:		%2
	Account Domain:		%3
	Logon ID:		%4

Object:
	Object Server:	%5
	Object Type:	%6
	Object Name:	%7
	Handle ID:	%8

Process Information:
	Process ID:	%16
	Process Name:	%17

Access Request Information:
	Transaction ID:	%9
	Accesses:	%10
	Access Reasons:		%11
	Access Mask:	%12
	Privileges Used for Access Check:	%13
	Properties:	%14
	Restricted SID Count:	%15
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows 8.1 (2012 R2)
Windows 10 (2016)
Category DS Access
Source Microsoft-Windows-Security-Auditing
TaskCategory Directory Service Access
EventId 4661
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 InsertionString7
Whom InsertionString7
Object Type InsertionString6
Class Name InsertionString6
Security ID InsertionString1
Account Name InsertionString2
Account Domain InsertionString3
Subject: Security ID Security ID of the account that performed the action. Usually resolved to Domain\Name in home environment. InsertionString1 S-1-5-21-1135140816-2109348461-2107143693-500
Subject: Account Name Name of the account that initiated the action. InsertionString2 ALebovsky
Subject: Account Domain Name of the domain that account initiating the action belongs to. InsertionString3 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. InsertionString4 0x2a88a
Object: Object Server The name of the system component handling the access request InsertionString5 Security Account Manager
Object: Object Type The class object as specified in the schema for this forest (user, group, organizational unit, etc.) InsertionString6 SAM_DOMAIN
Object: Object Name Distinguished name of the AD object InsertionString7 DC=Logistics,DC=corp
Object: Handle ID ID of the object handle granted to the process accessing it InsertionString8 0x2dace0
Process Information: Process ID InsertionString16 0x238
Process Information: Process Name InsertionString17 C:\Windows\System32\lsass.exe
Access Request Information: Transaction ID InsertionString9 {00000000-0000-0000-0000-000000000000}
Access Request Information: Accesses InsertionString10 ListAccounts
Access Request Information: Access Mask InsertionString12 0x100
Access Request Information: Privileges Used for Access Check InsertionString13 -
Access Request Information: Properties InsertionString14 ---
Access Request Information: Restricted SID Count InsertionString15 0
Access Request Information: Access Reasons InsertionString11 -
Process Name InsertionString17
Accesses InsertionString10
Access Mask InsertionString12
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