Why AD Security is Critical
Active Directory controls authentication and authorization for virtually every resource. Compromise AD, and you own the entire organization. It's the primary target for attackers.
The Stakes
95% of Fortune 500 have been compromised via AD attacks. Median time to domain admin is just 4 hours once inside.
Tiered Administration Model
Implement administrative tiers to contain compromise. Higher tier credentials never touch lower tier systems.
Administrative Tiers
Tier 0
Domain Controllers, AD
Tier 1
Servers & Applications
Tier 2
Workstations & Users
Key Principle
- Tier 0 admin → Only logs into Tier 0 systems
- Tier 1 admin → Only logs into Tier 1 systems
- Never cross tiers → Prevents credential theft
Hardening Roadmap
Implementation Phases
Quick Wins
Deploy LAPS, Protected Users, rotate KRBTGT, minimize Domain Admins
Intermediate
PAWs for Tier 0, gMSAs for services, advanced auditing, AdminSDHolder monitoring
Advanced
Full tiered model, Credential Guard, JIT administration, continuous assessment
Hardened AD
Vulnerable AD
Security Checklist
AD Hardening Controls
Identity Protection
Privileged Access
Monitoring
Attack Prevention
Quick Win
Deploy LAPS immediately—it prevents lateral movement by randomizing local admin passwords. Single highest-impact quick win for AD security.
Conclusion
AD security is fundamental to enterprise security. Implement tiered administration, deploy LAPS, and monitor for attack indicators to protect your identity infrastructure.
Tags
Written by
Asfaleia Team
Chief Security Researcher
Active Directory security specialist with expertise in enterprise identity protection.