Cis Azure Foundations 8.1.5.1

8.1.5.1 Ensure That Microsoft Defender for Storage Is Set To 'On' (Automated)

Description

Turning on Microsoft Defender for Storage enables threat detection for Storage, providing threat intelligence, anomaly detection, and behavior analytics in the Microsoft Defender for Cloud.

Rationale

Enabling Microsoft Defender for Storage allows for greater defense-in-depth, with threat detection provided by the Microsoft Security Response Center (MSRC).

Impact

Turning on Microsoft Defender for Storage incurs an additional cost per resource.

Audit Procedure

From Azure Portal:

1. Go to Microsoft Defender for Cloud.
2. Under Management, select Environment Settings.
3. Click on the subscription name.
4. Select the Defender plans blade.
5. Ensure Status is set to On for Storage.

From Azure CLI:

az security pricing show -n StorageAccounts

Ensure the output is Standard.

From PowerShell:

Get-AzSecurityPricing -Name 'StorageAccounts' | Select-Object Name,PricingTier

Ensure output for Name PricingTier is StorageAccounts Standard.

From Azure Policy:

• Policy ID: 640d2586-54d2-465f-877f-9ffc1d2109f4 - Name: 'Microsoft Defender for Storage should be enabled'

Expected Result

The pricing tier for StorageAccounts should be Standard.

Remediation

From Azure Portal:

1. Go to Microsoft Defender for Cloud.
2. Under Management, select Environment Settings.
3. Click on the subscription name.
4. Select the Defender plans blade.
5. Set Status to On for Storage.
6. Select Save.

From Azure CLI:

az security pricing create -n StorageAccounts --tier 'standard'

From PowerShell:

Set-AzSecurityPricing -Name 'StorageAccounts' -PricingTier 'Standard'

Default Value

By default, Microsoft Defender plan is off.

References

1. https://learn.microsoft.com/en-us/azure/defender-for-cloud/alerts-overview
2. https://learn.microsoft.com/en-us/rest/api/defenderforcloud/pricings/list
3. https://learn.microsoft.com/en-us/rest/api/defenderforcloud/pricings/update
4. https://learn.microsoft.com/en-us/powershell/module/az.security/get-azsecuritypricing

Profile

• Level 2