THE DIRECT ANSWER
Why AD Is the #1 Target
Attackers who gain domain admin access can:
• Create new admin accounts
• Reset any password
• Access any system
• Deploy ransomware domain-wide in minutes
• Maintain hidden backdoors for months
Warning Signs to Monitor
• New admin accounts: Any new account added to admin groups
• Privilege changes at odd hours: Admin activities at 2 AM are suspicious
• Disabled accounts re-enabled: Often a sign of persistence
• Service account authentication anomalies: Service accounts should be predictable
• Password spraying patterns: Many accounts with failed logins in short time
Essential AD Security Controls
1. Tiered Admin Model: Separate accounts for workstation, server, and domain admin
2. Privileged Access Workstations: Admin tasks only from secured systems
3. LAPS: Unique local admin passwords on every machine
4. Credential Guard: Protect credentials from theft
5. Event Log Forwarding: Centralize logs before attackers can delete them
Questions for Your IT Provider
6. Do you monitor AD for suspicious changes 24/7?
7. How quickly would you detect a new admin account?
8. Do you use a tiered admin model?
9. When was the last AD security assessment?
Sources and evidence
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