Windows Security Log Event ID 639

639: Security Enabled Local Group Changed

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• Description of this event
• Field level details
• Examples
• Mini-seminars on this event

Security local group changed.Type:

AD has 2 types of groups: Security and Distribution. Distribution (security disabled) groups are for distribution lists in Exchange and cannot be assigned permissions or rights. Security (security enabled) groups can be used for permissions, rights and as distribution lists.

Scope:

AD has 3 scopes of groups: Local, Global, Universal. See knowledge base article 326265.

This event does include group member additions and deletions for which there are other event IDs.

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Description Fields in 639

• Target Account Name: %1
• Target Domain: %2
• Target Account ID: %3
• Caller User Name: %4
• Caller Domain: %5
• Caller Logon ID: %6
• Privileges: %7

Windows Server 2003 adds these fields:

• Changed Attributes: (the following two fields are on Server 2008 only)
• Sam Account Name: %8
• Sid History: %9

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Mini-Seminars Covering Event ID 639 Monitoring Active Directory for Security and Compliance: How Far Does the Native Audit Log Take You?

 

Upcoming Webinars Unpacking a Linux Supply Chain Compromise Using the Recently Published XZ Utils Backdoor as the Example Assessing the Security of Your Active Directory: User Accounts Anatomy of a Cloud Hack: The Cloudflare/Okta Compromise – A Story of Tokens, Lateral Movement, Persistence and the Salvation of Zero Trust and Hard MFA Tokens

Additional Resources

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