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Severity : High

Description: This control ensures that Disk encryption should be applied on virtual machines' is enabled for at least one policy assignment with policy definition Enable Monitoring in Azure Security Center. When this setting is

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not disabled, it recommends enabling disk encryption in all virtual machines to enhance data protection at rest

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.

Remediation Steps:

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Perform following to update parameters:

1. Login to Azure Portal using https://portal.azure.com.

2. Go to Policy service.

3. On Policy overview, Click onDefault/Custom Policy.

4. Click on Edit Assignments.

5. In Basics menu, check there are no exclusions added for resource Group.

6. Set Policy Enforcement to Enabled.

7. Goto Parameters and set Disk encryption should be applied on virtual machines to AuditIfNotExist.

8. Click Review + save.

Important:

• Along with ASC Default assignment, there could be custom policy assignments with the policy definition "Enable Monitoring in Azure Security Center". 'Monitor missing Endpoint Protection in Azure Security Center' should be enabled for at least one of such assignments

Reference:

• https://docs.microsoft.com/en-us/azure/security-center/security-center-policies

• https://docs.microsoft.com/en-us/azure/security-center/security-center-apply-disk-encryption

• https://msdn.microsoft.com/en-us/library/mt704062.aspx

• https://msdn.microsoft.com/en-us/library/mt704063.aspx

• https://docs.microsoft.com/en-us/rest/api/resources/policyassignments/get

• https://docs.microsoft.com/en-us/rest/api/resources/policyassignments/create