Topic starter
24/06/2026 11:15 pm
TL;DR: Active Directory remains the attacker’s fast lane because single-endpoint access can still expand into reconnaissance, lateral movement, privilege escalation, and ransomware or theft at scale, according to Semperis. The core lesson is that incident response fails when identity teams treat AD as legacy plumbing instead of the control plane that defines blast radius and recovery order.
Editorial analysis by NHI Mgmt Group, based on content published by Semperis: “25 Years of AD Breaches: Three Moves to Transform Incident Response”.
Key questions
Q: What breaks when Active Directory is treated as legacy infrastructure during an incident?
A: Containment breaks because the directory itself determines privilege, connectivity, and recovery order.
Q: Why does poor AD visibility make incident response slower and riskier?
A: Because attackers often use ordinary directory operations to move laterally and escalate privileges, defenders need logs, retention, and behavioural baselines to separate normal administration from malicious activity.
Q: What do security teams get wrong about Tier 0 protection in hybrid identity environments?
A: They often treat Tier 0 as a password problem instead of a trust-path problem.
Practitioner guidance
- Map Tier 0 dependencies before a crisis Document domain controllers, AD CS, Entra ID Connect, virtualization hosts, and key management systems as Tier 0 assets, then identify every administrative path that can reach them.
- Turn on response-grade logging and retention Ensure domain controller logs are shipped to a SIEM with enough retention to reconstruct attacker activity, and baseline normal directory behaviour so anomalies stand out during an incident.
- Segregate privileged administration workstations Use dedicated privileged access workstations for Tier 0 tasks only, and keep them internet-restricted so routine user compromise does not become a direct path to domain dominance.
Bottom line: Active Directory incidents are difficult because a single foothold can expand into reconnaissance, privilege escalation, and domain-wide impact across hybrid identity infrastructure.
Explore further
View Full Forum → | NHI Foundation Course → | Our Services → | Read the full analysis →
25/06/2026 8:01 am
Active Directory incident response fails when teams treat identity as a support service instead of the control plane for containment and recovery. The article shows that AD determines both attack spread and restoration order in hybrid environments. That means incident response maturity is really identity maturity, because the directory defines who can move, what can be isolated, and what can be safely rebuilt.
A question worth separating out:
Q: How should teams recover AD after a domain compromise without making the situation worse?
A: They should preserve evidence, confirm scope, protect any known-good recovery path, disable non-essential privileged accounts, and restore by business priority rather than by panic. Resetting everything too quickly can erase clues and still leave attackers with durable identity artefacts such as forged tickets or compromised credentials.
👉 Read our full editorial: Active Directory incident response needs a NIST CSF lens