Cis Azure Foundations 8.1.6.1

8.1.6.1 Ensure That Microsoft Defender for App Services Is Set To 'On' (Automated)

Description

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

Rationale

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

Impact

Turning on Microsoft Defender for App Service 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 the subscription name.
4. Select Defender plans.
5. Ensure Status is On for App Service.

From Azure CLI:

az security pricing show -n AppServices

Ensure -PricingTier is set to Standard.

From PowerShell:

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

Ensure the -PricingTier is set to Standard.

From Azure Policy:

• Policy ID: 2913021d-f2fd-4f3d-b958-22354e2bdbcb - Name: 'Azure Defender for App Service should be enabled'

Expected Result

The pricing tier for AppServices should be Standard.

Remediation

From Azure Portal:

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

From Azure CLI:

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

From PowerShell:

Set-AzSecurityPricing -Name "AppServices" -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