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Change Auditor for Active Directory 7.1.1 - Event Reference Guide

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Introduction Change Auditor for Active Directory Events

Active Directory Database Active Directory Federation Services - Authentication Methods Active Directory Federation Services - Sign-in Active Directory Federation Services - Relying Party Trusts 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

InTrust for AD event log InTrust for ADAM event Log

Replication Transport

Table 23. Replication Transport events

Bridge All Site Links Option Changed

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

Ignore Link Schedules Option Changed

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

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.

As an example, 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.

Schema Configuration

Table 24. 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

Site Configuration

Table 25. Site Configuration events
Event	Description	Severity
Automatic Intersite Topology Generation Role Changed	Created when the intersite topology generation role is assigned to another DC.	Medium
Automatic Intersite Topology Generator for the Site has been Disabled	Created when intersite topology generation is disabled for a site.	High
Automatic Intersite Topology Generator for the Site has been Enabled	Created when intersite topology generation is enabled for a site.	Medium
Automatic Intrasite Topology Generation for the Site has been Enabled	Created when intrasite topology generation is enabled for a site.	Medium
Automatic Intrasite Topology Generator for the Site has been Disabled	Created when intrasite topology generation is disabled for a site.	High
Default Site Query Policy Object Changed	Created when the default query policy object reference for a site is changed.	Medium
Domain Controller Moved to Site	Created when a Domain controller is moved to a site.	Medium
Linked Query Policy Object for Site Changed	Created when the query policy object referred to by a site is changed.	Medium
Site Group Policy Order Changed	Created when the list of group policies linked to a site is re-ordered.	Medium
Site License Server Changed	Created when the licensing server for the site is changed.	Medium

Site Link Bridge Configuration

Table 26. Site Link Bridge Configuration events
Event	Description	Severity
Site Link Added to Site Link Bridge	Created when a site link has been added to a site link bridge.	Medium
Site Link Removed from Site Link Bridge	Created when a site link has been removed from a site link bridge.	High

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