CHAIN-094 — Blob versioning off + immutability off + writable

Summary

Severity: Critical · Likelihood: High · Logic: ALL

Why this chain matters

A storage container has blob versioning and immutability both off AND a compromised key. A ransomware operator overwrites every blob with encrypted content. Original data gone — this is 'ransomware by API call'.

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_013	Trigger
zt_data_016	Trigger

Attack walkthrough

Step 1 — Authenticate via SAS/account key.

Actor: Attacker with key
MITRE ATT&CK: T1078
Enabled by: zt_data_013

Attacker gain: Write access to container.

Step 2 — PUT encrypted content over every existing blob; previous version unreachable.

Actor: Attacker
MITRE ATT&CK: T1486
Enabled by: zt_data_016

Attacker gain: Full encryption ransomware on storage.

Blast radius

Initial access	Any storage write access.
Max privilege	Destructive — full container encryption.
Data at risk	Every blob in container
Services at risk	Storage, Any dependent app

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.