How to Detect Who Added a User to Domain Admins Group

We know that Active Directory is one of important part on Company system, For Company that do not have any specific staff to manage this server, they will assign all of staff to do job. This will make susceptible to security breach. So we need to know the activity of this server like "Who Added a User to Domain Admins Group". I get some tips form Netwrix and Social Technet on Microsoft how to do it.
  1. Configure Audit Policy Settings by running GPMC.msc → Edit “Default Domain Policy” → Computer Configuration → Policies → Windows Settings → Security Settings → Local Policies → Audit Policy → Audit account management → Define → Success.
  2. Configure object-level Active Directory auditing settings by opening ADSI Edit → Connect to “Default naming context”→ Click “OK” → Right-click DomainDNS object with the name of your domain → Properties → Security (Tab) → Advanced (Button) → Auditing (Tab) → Add Principal “Everyone” → Type “Success” → Applies to “This object and Descendant objects” → Permissions: → Select all check boxes except the following: “Full Control”, “List Contents”, “Read all properties”, “Read permissions” → Click “OK”.
  3. Enlarge security event log capacity by running GPMC.msc → Edit “Default Domain Policy” → Computer Configuration → Policies → Windows Settings → Security Settings → Event Log → Define:
    • Maximum security log size to 1gb
    • Retention method for security log to “Overwrite events as needed”.
  4. Run “gpupdate /force” command.
  5. Run eventvwr.msc and filter security log for event id 4728 to detect when users are added to security-enabled global groups. The group name in our case is “Domain Admins”.
Source: www.netwrix.com | Tutorial on You Tube (Link).
Source: social.technet.microsoft.com by Santosh Bhandarkar

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