CHAIN-143 — Cognitive Services key sprawl via multiple account copies

Summary

Severity: Medium · Likelihood: High · Logic: ALL

Why this chain matters

Cognitive Services subscription keys are distributed via email, Confluence, and shared password managers to every team that wants LLM access. Keys never rotate; there's no way to trace which team leaked which key.

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_ai_002	Trigger
zt_id_001	Trigger

Attack walkthrough

Step 1 — Search Slack / SharePoint for 'Ocp-Apim-Subscription-Key'.

Actor: Attacker
MITRE ATT&CK: T1552.001
Enabled by: zt_ai_002

Attacker gain: Valid Cognitive Services key.

Step 2 — Use key for free inference — billed to the owning tenant.

Actor: Attacker
MITRE ATT&CK: T1078
Enabled by: zt_id_001

Attacker gain: Financial abuse + potentially prompt-trail leakage.

Blast radius

Initial access	Key harvest.
Max privilege	Inference calls billed to victim.
Data at risk	Inference quota exhaustion
Services at risk	Cognitive Services account

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.