CHAIN-071 — Access review disabled or never runs

Summary

Severity: Medium · Likelihood: High · Logic: ALL

Why this chain matters

No access review is configured for privileged groups AND users with roles are never required to re-justify their access. Role assignments accumulate as people change teams. Eventually the tenant has 30+ Global Admins nobody can justify.

Component rules

This chain fires when its trigger conditions are met by the following rules. Click any rule to see its detection logic and compliance mappings.

Rule ID	Role
zt_id_019	Trigger
zt_id_006	Trigger

Attack walkthrough

Step 1 — Users change jobs but keep old roles because nobody reviews.

Actor: Time / organisation drift
MITRE ATT&CK: T1136.003
Enabled by: zt_id_019

Attacker gain: Stale admin inventory.

Step 2 — Target any one of the many admins who no longer need the role.

Actor: Attacker
MITRE ATT&CK: T1078
Enabled by: zt_id_006

Attacker gain: High-probability attack surface.

Blast radius

Initial access	Phishing any stale admin.
Max privilege	Whatever that admin role grants.
Data at risk	Role scope
Services at risk	Entra ID

How the logic works

The chain fires only when every rule above has at least one finding in the current scan. Missing any one rule breaks the chain — so remediating any single step disrupts the attack path.