Change Auditor for Active Directory 7.3

Introduction Change Auditor for Active Directory Events

Active Directory Database Active Directory Federation Services - Authentication Methods Active Directory Federation Services - Claims Provider Trusts Active Directory Federation Services - Endpoints Active Directory Federation Services - Relying Party Trusts Active Directory Federation Services - Server Farm Configuration Monitoring Connection Object Custom AD Object Monitoring Custom Computer Monitoring Custom Group Monitoring Custom User Monitoring DNS Service DNS Zone Domain Configuration Dynamic Access Control Forest Configuration FRS Service Group Policy Item Group Policy Object IP Security NETLOGON Service NTDS Service Organizational Unit (OU) Replication Transport Schema Configuration Site Configuration Site Link Bridge Configuration Site Link Configuration Subnets SYSVOL

Log Events

InTrust for AD event log InTrust for ADAM event Log

NTDS Service

Table 23. NTDS Service events
Event	Description	Severity
NTDS Default TTL Changed	Created whenever the default TTL is changed.	Low
NTDS Garbage Collection Period Changed	Created whenever the garbage collection period is changed.	Low
NTDS Minimum TTL Changed	Created whenever the minimum TTL is changed.	Low
NTDS TCP/IP Port Assignment Changed	Created when the NTDS RPC TCP/IP port assignment is changed.	Low
NTDS Tombstone Lifetime Setting Changed	Created whenever the tombstone lifetime is altered.	Low

Organizational Unit (OU)

Table 24. Organizational Unit (OU) events
Event	Description	Severity
Alternate UPN Suffix Added to OU	Created when an entry is added to the list of alternate user principal name (UPN) suffixes available for user names.	Medium
Alternate UPN Suffix Removed from OU	Created when an entry is removed from the list of alternate user principal name (UPN) suffixes available for user names.	Medium
DACL Changed on OU Object	Created when the DACL is changed on an OU object. NOTE: Change Auditor access control list (ACL) events (discretionary access control list (DACL) and system access control list (SACL) changes), will not report inherited access control entry (ACE) changes. This event does NOT report inherited ACL changes.	High
Domain Controller Added to OU	Created when a domain controller is added to an OU.	High
Domain Controller Removed from OU	Created when a domain controller is removed from an OU.	High
OU Group Policy Order Changed	Created when the list of group policies linked to an organizational unit is re-ordered.	Medium
Inheritance Setting Changed on OU Object	Created when the inheritance setting of a OU object is changed.	High
Subordinate OU Added	Created when an OU is added to another OU.	Medium
Subordinate OU Removed	Created when an OU is removed from another OU.	Medium
Subordinate OU Renamed	Created when a subordinate OU is renamed.	Medium

Replication Transport

Table 25. Replication Transport events

Event

Description

Severity

Bridge All Site Links Option Changed

Created when the Bridge all site links check box on the replication transport property page is changed.

Medium

Ignore Link Schedules Option Changed

Created when the Ignore schedules check box on the replication transport property page is changed.

Medium

Irregular domain replication activity detected

This event identifies replication behavior that may indicate that DCSync is being used to retrieve password data through domain replication.

Irregular requests can include:

•

Replication activity from the same source and target computer.

•

Replication activity that is initiated by a user account instead of a computer account.

DCSync is a command within Mimikatz that can simulate the behaviour of a Domain Controller and make replication requests. This activity can result in someone gaining unauthorized access to user credentials. The stolen credentials can then be used to create a golden ticket or silver ticket and can be used for pass-the-hash and overpass-the-hash scenarios.

This event identifies replication behavior that may indicate that DCSync is being used to compromise the security of your network.

High

Schema Configuration

Table 26. Schema Configuration events
Event	Description	Severity
Attribute Added to Optional Attributes	Created when a new attribute is added to the optional attributes for a class object in the schema.	High
Attribute Removed from Optional Attributes	Created when an attribute is removed from the Optional Attributes for a class object in the schema.	High
Class Removed from Auxiliary Classes in Schema	Created when a class is removed from auxiliaryClass.	High
Class Removed from Possible Superiors in Schema	Created when a class is removed from possSuperiors.	High
New Class Added to Auxiliary Classes in Schema	Created when a new class is added to auxiliaryClass.	High
New Class Added to Possible Superiors in Schema	Created when a new class is added to possSuperiors.	High
Schema Attribute Added	Created when a new attribute is added to the schema.	High
Schema Attribute Confidential flag changed	Created when an Attribute Confidential flag is changed.	High
Schema Attribute defaultHidingValue Changed	Created when the defaultHidingValue is changed.	High
Schema Attribute GC Flag Changed	Created when the GC flag for an attribute is changed.	High
Schema Attribute Indexing Flag Changed	Created when the indexing flag for an attribute is changed.	High
Schema Attribute RODC Filtered flag changed	Created when an Attribute RODC Replication flag is changed.	High
Schema Class Added	Created when a new class is added to the schema.	High
Schema Class Default Security Descriptor Changed	Created when the default security descriptor for a class is changed.	High
Schema Object Disabled	Created when a schema object is marked disabled.	High
Schema Object Enabled	Created when a schema object is marked enabled.	High
Schema Version Changed	Created when the schema version number changes.	High

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Change Auditor for Active Directory 7.3 - Event Reference Guide

NTDS Service

Organizational Unit (OU)

Replication Transport

Schema Configuration