Ensure that Microsoft Defender for App Service is set to 'On'

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).

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

From Azure Console

1. Go to 'Microsoft Defender for Cloud'
2. Select 'Environment Settings' blade
3. Click on the subscription name
4. Select the 'Defender plans' blade
5. On the line in the table for 'App Service' Select 'On' under 'Plan'.
6. Select 'Save

Using Azure Command Line Interface 2.0

Use the below command to enable Standard pricing tier for App Service

az account get-access-token --query "{subscription:subscription,accessToken:accessToken}" --out tsv | xargs -L1 bash -c 'curl -X PUT -H "Authorization: Bearer $1" -H "Content-Type: application/json" https://management.azure.com/subscriptions/$0/providers/Microsoft.Security/pricings/AppServices?api-version=2018-06-01 -d@"input.json"'

Where input.json contains the Request body json data as mentioned below.

{
"id": "/subscriptions//providers/Microsoft.Security/pricings/AppServices",
"name": "AppServices",
"type": "Microsoft.Security/pricings",
"properties": {
"pricingTier": "Standard"
}
}
.