Possible Azure Storage Ransomware via Customer-Managed Key Encryption

ATT&CK techniques

Defense Evasion → Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1578.001Create Snapshot
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects Azure Activity operations that rewrite storage account encryption to attacker-controlled key material, a hijack path for blob storage ransomware. Writing an encryption scope or setting the account key source to Key Vault lets an actor re-encrypt blobs under a key they hold and then deny the victim access. These control-plane encryption changes on production storage accounts warrant urgent review.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

Malicious JADEPUFFER Lockd Encryptor Execution

Suspicious Mass Locked Extension File Creation by Ransomware

Malicious Interlock Ransomware Encrypted File and Note Creation (via file_event)

Malicious Ransomware Encryption Extension x2anylock

Malicious Fivehands Go Encryptor Execution via Command Line Flags

Malicious SafePay Ransomware Encryptor Command-Line Execution

Malicious The Gentlemen Ransomware Encryptor via Distinctive CLI Flags

Malicious GigaWiper Ransomware File Extension .candy

Malicious Forced BitLocker Encryption for Extortion (via process_creation)

Possible Azure Storage Ransomware via Customer-Managed Key Encryption

Pivot detection · T1486 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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