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Note

The Microsoft Defender for Identity features explained on this page are also accessible using the new portal.

Microsoft Defender for Identity monitors information generated from your organization’s Active Directory, network activities and event activities to detect suspicious activity. The monitored activity information enables Defender for Identity to help you determine the validity of each potential threat and correctly triage and respond.

In the case of a valid threat, or true positive, Defender for Identity enables you to discover the scope of the breach for each incident, investigate which entities are involved, and determine how to remediate them.

The information monitored by Defender for Identity is presented in the form of activities. Defender for Identity currently supports monitoring of the following activity types:

 Note

  • This article is relevant for all Defender for Identity sensor types.
  • Defender for Identity monitored activities appear on both the user and machine profile page.
  • Defender for Identity monitored activities are also available in Defender for Cloud Apps and Microsoft 365 Defender’s Advanced Hunting page.

Monitored user activities: User account AD attribute changes

MONITORED USER ACTIVITIES: USER ACCOUNT AD ATTRIBUTE CHANGES
Monitored activity Description
Account Constrained Delegation State Changed The account state is now enabled or disabled for delegation.
Account Constrained Delegation SPNs Changed Constrained delegation restricts the services to which the specified server can act on behalf of the user.
Account Delegation Changed Changes to the account delegation settings
Account Disabled Changed Indicates whether an account is disabled or enabled.
Account Expired Date when the account expires.
Account Expiry Time Changed Change to the date when the account expires.
Account Locked Changed Change to the date when the account expires.
Account Password Changed User changed their password.
Account Password Expired User’s password expired.
Account Password Never Expires Changed User’s password changed to never expire.
Account Password Not Required Changed User account was changed to allow logging in with a blank password.
Account Smartcard Required Changed Account changes to require users to log on to a device using a smart card.
Account Supported Encryption Types Changed Kerberos supported encryption types were changed (types: Des, AES 129, AES 256)
Account Unlock changed Changes to the account unlock settings
Account UPN Name Changed User’s principle name was changed.
Group Membership Changed User was added/removed, to/from a group, by another user or by themselves.
User Mail Changed Users email attribute was changed.
User Manager Changed User’s manager attribute was changed.
User Phone Number Changed User’s phone number attribute was changed.
User Title Changed User’s title attribute was changed.

Monitored user activities: AD security principal operations

MONITORED USER ACTIVITIES: AD SECURITY PRINCIPAL OPERATIONS
Monitored activity Description
Computer Account Created Computer account was created
Security Principal Deleted Changed Account was deleted/restored (both user and computer).
Security Principal Display Name Changed Account display name was changed from X to Y.
Security Principal Name Changed Account name attribute was changed.
Security Principal Path Changed Account Distinguished name was changed from X to Y.
Security Principal Sam Name Changed SAM name changed (SAM is the logon name used to support clients and servers running earlier versions of the operating system).

Monitored user activities: Domain controller based user operations

MONITORED USER ACTIVITIES: DOMAIN CONTROLLER BASED USER OPERATIONS
Monitored activity Description
Directory Service Replication User tried to replicate the directory service.
DNS Query Type of query user performed against the domain controller (AXFR,TXTMXNSSRVANYDNSKEY).
gMSA Password retrieval gMSA account password was retrieved by a user.
To monitor this activity, event 4662 must be collected. For more information, see Configure Windows Event collection.
LDAP Query User performed an LDAP query.
Potential lateral movement A lateral movement was identified.
PowerShell execution User attempted to remotely execute a PowerShell method.
Private Data Retrieval User attempted/succeeded to query private data using LSARPC protocol.
Service Creation User attempted to remotely create a specific service to a remote machine.
SMB Session Enumeration User attempted to enumerate all users with open SMB sessions on the domain controllers.
SMB file copy User copied files using SMB
SAMR Query User performed a SAMR query.
Task Scheduling User tried to remotely schedule X task to a remote machine.
Wmi Execution User attempted to remotely execute a WMI method.

Monitored user activities: Login operations

MONITORED USER ACTIVITIES: LOGIN OPERATIONS
Logon type Monitored activity Description
Logon type 2 Credentials Validation Domain-account authentication event using the NTLM and Kerberos authentication methods.
Logon type 2 Interactive Logon User gained network access by entering a username and password (authentication method Kerberos or NTLM).
Logon type 2 Interactive Logon with Certificate User gained network access by using a certificate.
Logon type 2 VPN Connection User connected by VPN – Authentication using RADIUS protocol.
Logon type 3 Resource Access User accessed a resource using Kerberos or NTLM authentication.
Logon type 3 Delegated Resource Access User accessed a resource using Kerberos delegation.
Logon type 8 LDAP Cleartext User authenticated using LDAP with a clear-text password (Simple authentication).
Logon type 10 Remote Desktop User performed an RDP session to a remote computer using Kerberos authentication.
Failed Logon Domain-account failed authentication attempt (via NTLM and Kerberos) due to the following: account was disabled/expired/locked/used an untrusted certificate or due to invalid logon hours/old password/expired password/wrong password.
Failed Logon with Certificate Domain-account failed authentication attempt (via Kerberos) due to the following: account was disabled/expired/locked/used an untrusted certificate or due to invalid logon hours/old password/expired password/wrong password.

Monitored machine activities: Machine account

MONITORED MACHINE ACTIVITIES: MACHINE ACCOUNT
Monitored activity Description
Computer Operating System Changed Change to the computer OS.
SID-History changed Changes to the computer SID history

Source : Official Microsoft Brand
Editor by : BEST Antivirus KBS Team

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