CHAIN-084 — Stream Analytics input with embedded storage key

Summary

Severity: Medium · Likelihood: Medium · Logic: ALL

Why this chain matters

A Stream Analytics job reads from a storage account using an embedded account key rather than managed identity. A job export leaks the key; the storage account has a loose SAS policy. One exposure chains into long-term account access.

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_data_024	Trigger
zt_data_012	Trigger

Attack walkthrough

Step 1 — Export ASA job definition; extract account key.

Actor: Attacker
MITRE ATT&CK: T1552.001
Enabled by: zt_data_024

Attacker gain: Storage account key.

Step 2 — Use key to mint fresh SAS; access any container.

Actor: Attacker
MITRE ATT&CK: T1530
Enabled by: zt_data_012

Attacker gain: Persistent storage access.

Blast radius

Initial access	ASA job read.
Max privilege	Full storage account.
Data at risk	Entire storage account
Services at risk	Storage, Downstream ASA outputs

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.