Learn how to deploy Microsoft Antimalware to enhance platform protection for your Azure virtual machines. Follow the steps to create a custom policy definition and assign it with the right settings to safeguard your resources.
Table of Contents
Question
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Overview
Litware, Inc. is a digital media company that has 500 employees in the Chicago area and 20 employees in the San Francisco area.
Existing Environment
- Litware has an Azure subscription named Sub1 that has a subscription ID of 43894a43-17c2-4a39-8cfc-3540c2653ef4.
- Sub1 is associated to an Azure Active Directory (Azure AD) tenant named litwareinc.com. The tenant contains the user objects and the device objects of all the
- Litware employees and their devices. Each user is assigned an Azure AD Premium P2 license. Azure AD Privileged Identity Management (PIM) is activated.
The tenant contains the groups shown in the following table.
| Name | Type | Description |
|---|---|---|
| Group1 | Security group | A group that has the Dynamic User membership type, contains all the San Francisco users, and provides access to many Azure AD applications and Azure resources. |
| Group2 | Security group | A group that has the Dynamic User membership type and contains the Chicago IT team. |
The Azure subscription contains the objects shown in the following table.
| Name | Type | Description |
|---|---|---|
| VNet1 | Virtual network | VNet1 is a virtual network that contains security-sensitive IT resources. VNet1 contains three subnets named Subnet0, Subnet1, and AzureFirewallSubnet. |
| VM0 | Virtual machine | VM0 is an Azure virtual machine that runs Windows Server 2016, connects to Subnet0, and has just in time (JIT) VM access configured. |
| VM1 | Virtual machine | VM1 is an Azure virtual machine that runs Windows Server 2016 and connects to Subnet0. |
| SQLDB1 | Azure SQL Database | SQLDB1 is an Azure SQL database on a SQL Database server named LitwareSQLServer1. |
| WebApp1 | Web App | WebApp1 is an Azure web app that is accessible by using https://www.litwareinc.com and http://www.litwareinc.com. |
| RG1 | Resource group | RG1 is a resource group that contains VNet1, VM0, and VM1. |
| RG2 | Resource group | RG2 is a resource group that contains shared IT resources. |
Azure Security Center is set to the Standard tier.
Requirements
Planned Changes
Litware plans to deploy the Azure resources shown in the following table.
| Name | Type | Description |
|---|---|---|
| Firewall1 | Azure Firewall | An Azure firewall on VNet1. |
| RT1 | Route table | A route table that will contain a route pointing to Firewall1 as the default gateway and will be assigned to Subnet0. |
| AKS1 | Azure Kubernetes Service (AKS) | A managed AKS cluster. |
Identity and Access Requirements:
Litware identifies the following identity and access requirements:
- All San Francisco users and their devices must be members of Group1.
- The members of Group2 must be assigned the Contributor role to RG2 by using a permanent eligible assignment.
- Users must be prevented from registering applications in Azure AD and from consenting to applications that access company information on the users’ behalf.
Platform Protection Requirements
Litware identifies the following platform protection requirements:
- Microsoft Antimalware must be installed on the virtual machines in RG1.
- The members of Group2 must be assigned the Azure Kubernetes Service Cluster Admin Role.
- Azure AD users must be able to authenticate to AKS1 by using their Azure AD credentials.
- Following the implementation of the planned changes, the IT team must be able to connect to VM0 by using JIT VM access.
- A new custom RBAC role named Role1 must be used to delegate the administration of the managed disks in RG1. Role1 must be available only for RG1.
Security Operations Requirements
- Litware must be able to customize the operating system security configurations in Azure Security Center.
Data and Application Requirements
- Litware identifies the following data and applications requirements:
- The users in Group2 must be able to authenticate to SQLDB1 by using their Azure AD credentials.
- WebApp1 must enforce mutual authentication.
General Requirements
Litware identifies the following general requirements:
- Whenever possible, administrative effort must be minimized.
- Whenever possible, use of automation must be maximized.
HOTSPOT –
You need to deploy Microsoft Antimalware to meet the platform protection requirements.
What should you do? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
Create a custom policy definition that has effect set to:
- Append
- Deny
- DeployIfNotExists
Create a policy assignment and modify:
- The create a Managed Identity setting
- The exclusion settings
- The scope
Answer
Create a custom policy definition that has effect set to: DeployIfNotExists
Create a policy assignment and modify: The create a Managed Identity setting
Explanation
Scenario: Microsoft Antimalware must be installed on the virtual machines in RG1.
RG1 is a resource group that contains Vnet1, VM0, and VM1.
Box 1: DeployIfNotExists –
DeployIfNotExists executes a template deployment when the condition is met.
Azure policy definition Antimalware
Incorrect Answers:
Append:
Append is used to add additional fields to the requested resource during creation or update. A common example is adding tags on resources such as costCenter or specifying allowed IPs for a storage resource.
Deny:
Deny is used to prevent a resource request that doesn’t match defined standards through a policy definition and fails the request.
Box 2: The Create a Managed Identity setting
When Azure Policy runs the template in the deployIfNotExists policy definition, it does so using a managed identity. Azure Policy creates a managed identity for each assignment, but must have details about what roles to grant the managed identity.
Reference
- Azure > Governance > Policy > Understand Azure Policy effects
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