Description:

This integration setting enables Microsoft Defender for Cloud Apps (formerly 'Microsoft Cloud App Security' or 'MCAS' - see additional info) to communicate with Microsoft Defender for Cloud


Rationale:

Microsoft Defender for Cloud offers an additional layer of protection by using Azure Resource Manager events, which is considered to be the control plane for Azure. By analyzing the Azure Resource Manager records, Microsoft Defender for Cloud detects unusual or potentially harmful operations in the Azure subscription environment. Several of the preceding analytics are powered by Microsoft Defender for Cloud Apps. To benefit from these analytics, subscription must have a Cloud App Security license. Microsoft Defender for Cloud Apps works only with Standard Tier subscriptions.


Impact:

Microsoft Defender for Cloud Apps works with Standard pricing tier Subscription. Choosing the Standard pricing tier of Microsoft Defender for Cloud incurs an additional cost per resource.


Audit:

From Azure Portal

1. From Azure Home select the Portal Menu

2. Select Microsoft Defender for Cloud

3. Select Environment Settings blade

4. Click on the subscription name

5. Select the Integrations blade

6. Ensure setting Allow Microsoft Defender for Cloud Apps to access my data is selected.


From Azure CLI

Ensure the output of the below command is True

az account get-access-token --query
"{subscription:subscription,accessToken:accessToken}" --out tsv | xargs -L1
bash -c 'curl -X GET -H "Authorization: Bearer $1" -H "Content-Type:
application/json"
https://management.azure.com/subscriptions/<subscription_ID>/providers/Micros
oft.Security/settings?api-version=2021-06-01' | jq '.|.value[] |
select(.name=="MCAS")'|jq '.properties.enabled'

From PowerShell

Run the following series of commands to audit this configuration

Get-AzAccount
Set-AzContext -Subscription <subscription ID>
Get-AzSecuritySetting | Select-Object name,enabled |where-object {$_.name -eq
"MCAS"}
PowerShell Output - Non-Compliant
Name Enabled
---- -------
MCAS False
PowerShell Output - Compliant
Name Enabled
---- -------
MCAS True

Remediation:

From Azure Portal

1. From Azure Home select the Portal Menu.

2. Select Microsoft Defender for Cloud.

3. Select Environment Settings blade.

4. Select the subscription.

5. Select Integrations.

6. Check Allow Microsoft Defender for Cloud Apps to access my data.

7. Select Save.


From Azure CLI

Use the below command to enable Standard pricing tier for Storage Accounts

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/<subscription_ID>/providers/Micros
oft.Security/settings/MCAS?api-version=2021-06-01 -d@"input.json"'

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

{
 "id":
"/subscriptions/<Your_Subscription_Id>/providers/Microsoft.Security/settings/
MCAS",
 "kind": "DataExportSetting",
 "type": "Microsoft.Security/settings",
 "properties": {
 "enabled": true
 }
}

Default Value:

With Cloud App Security license, these alerts are enabled by default.

References:

1.https://docs.microsoft.com/en-in/azure/security-center/security-center-alertsservice-layer#azure-management-layer-azure-resource-manager-preview

2. https://docs.microsoft.com/en-us/rest/api/securitycenter/settings/list

3. https://docs.microsoft.com/en-us/rest/api/securitycenter/settings/update

4.https://docs.microsoft.com/en-us/security/benchmark/azure/security-controls-v3-identity-management#im-9-secure-user-access-to--existing-applications