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Block Read and Write access to specific file _Policy.md

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Device control policy sample: Block Read and Write access to specific file _Policy

Description: This is a policy.
Device Type: Windows Removable Device

A device control policy is a combination of policy rules, groups and settings.
This sample is based on the sample files.
To configure the sample, follow the deployment instructions.

Policy Rules

Name Devices Rule Type Access Notification Conditions
Included Excluded Disk Read Disk Write Disk Execute File Read File Write File Execute
Block Read and Write access to specific file
  • Group: Any Removable Storage and CD-DVD and WPD Group_1 (details)
    		Deny - - - ❌ - ❌ None (0)
    View MatchAll:
    • Windows File: MatchAny
      • Group: Block Read and Write access to specific file _Groups_2 (details)
    Audit Denied 📄 📄 📄 📄 📄 📄 Show notification and Send event (3) -

    Groups

    Any Removable Storage and CD-DVD and WPD Group_1

    This is a group of type Device. The match type for the group is MatchAny.

    Property Value
    PrimaryId RemovableMediaDevices
    PrimaryId CdRomDevices
    PrimaryId WpdDevices
    View XML 
    <Group Id="{9b28fae8-72f7-4267-a1a5-685f747a7146}" Type="Device">
	<!-- ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyGroups/%7B9b28fae8-72f7-4267-a1a5-685f747a7146%7D/GroupData -->
	<Name>Any Removable Storage and CD-DVD and WPD Group_1</Name>
	<MatchType>MatchAny</MatchType>
	<DescriptorIdList>
		<PrimaryId>RemovableMediaDevices</PrimaryId>
		<PrimaryId>CdRomDevices</PrimaryId>
		<PrimaryId>WpdDevices</PrimaryId>
	</DescriptorIdList>
</Group>

    Block Read and Write access to specific file _Groups_2

    This is a group of type File. The match type for the group is MatchAny.

    Property Value
    PathId *.exe
    PathId *.dll
    View XML 
    <Group Id="{e5f619a7-5c58-4927-90cd-75da2348a30f}" Type="File">
	<!-- ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyGroups/%7Be5f619a7-5c58-4927-90cd-75da2348a30f%7D/GroupData -->
	<Name>Block Read and Write access to specific file _Groups_2</Name>
	<MatchType>MatchAny</MatchType>
	<DescriptorIdList>
		<PathId>*.exe</PathId>
		<PathId>*.dll</PathId>
	</DescriptorIdList>
</Group>

    Settings

    Setting Name Setting Value Description Documentation
    DefaultEnforcement Deny Control Device Control default enforcement. This is the enforcement applied if there are no policy rules present or at the end of the policy rules evaluation none were matched. documentation
    DeviceControlEnabled True Enables/disables device control documentation

    Files

    This policy is based on information in the following files:

    Deployment Instructions

    Device control policy rules and groups can be deployed through the following management tools:

    Windows

    Intune UX

    Intune UX is not supported for this policy because:

    • File Read (8) is an unsupported access mask
    • File Execute (32) is an unsupported access mask
    • File Write (16) is an unsupported access mask
    • Windows File groups not supported.
    • Parameters are not supported

    Use Intune custom settings to deploy the policy instead.

    Group Policy (GPO)

    Define device control policy groups
    1. Go to Computer Configuration > Administrative Templates > Windows Components > Microsoft Defender Antivirus > Device Control > Define device control policy groups.
    2. Save the XML below to a network share.
    <Groups>
	<Group Id="{9b28fae8-72f7-4267-a1a5-685f747a7146}" Type="Device">
		<!-- ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyGroups/%7B9b28fae8-72f7-4267-a1a5-685f747a7146%7D/GroupData -->
		<Name>Any Removable Storage and CD-DVD and WPD Group_1</Name>
		<MatchType>MatchAny</MatchType>
		<DescriptorIdList>
			<PrimaryId>RemovableMediaDevices</PrimaryId>
			<PrimaryId>CdRomDevices</PrimaryId>
			<PrimaryId>WpdDevices</PrimaryId>
		</DescriptorIdList>
	</Group>
	<Group Id="{e5f619a7-5c58-4927-90cd-75da2348a30f}" Type="File">
		<!-- ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyGroups/%7Be5f619a7-5c58-4927-90cd-75da2348a30f%7D/GroupData -->
		<Name>Block Read and Write access to specific file _Groups_2</Name>
		<MatchType>MatchAny</MatchType>
		<DescriptorIdList>
			<PathId>*.exe</PathId>
			<PathId>*.dll</PathId>
		</DescriptorIdList>
	</Group>
</Groups>
    1. In the Define device control policy groups window, select Enabled and specify the network share file path containing the XML groups data.
    Define device control policy rules
    1. Go to Computer Configuration > Administrative Templates > Windows Components > Microsoft Defender Antivirus > Device Control > Define device control policy rules.
    2. Save the XML below to a network share.
    <PolicyRules>
	<PolicyRule Id="{5038638c-9352-47bb-88df-8a659f0c02a7}" >
		<!-- ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyRules/%7B5038638c-9352-47bb-88df-8a659f0c02a7%7D/RuleData -->
		<Name>Block Read and Write access to specific file</Name>
		<IncludedIdList>
			<GroupId>{9b28fae8-72f7-4267-a1a5-685f747a7146}</GroupId>
		</IncludedIdList>
		<ExcludedIdList>
		</ExcludedIdList>
		<Entry Id="{1ecfdafb-9b7f-4b66-b3c5-f1d872b0961d}">
			<Type>Deny</Type>
			<AccessMask>40</AccessMask>
			<Options>0</Options>
			<Parameters MatchType="MatchAll">
				<File MatchType="MatchAny">
					<GroupId>{e5f619a7-5c58-4927-90cd-75da2348a30f}</GroupId>
				</File>
			</Parameters>
		</Entry>
		<Entry Id="{2925ecd8-40dc-42bb-a972-da0de839dd4f}">
			<Type>AuditDenied</Type>
			<AccessMask>63</AccessMask>
			<Options>3</Options>
		</Entry>
	</PolicyRule>
</PolicyRules>
    1. In the Define device control policy rules window, select Enabled, and enter the network share file path containing the XML rules data.

    Intune Custom Settings

    Create custom intune configuration
    1. Navigate to Devices > Configuration profiles
    2. Click Create (New Policy)
    3. Select Platform "Windows 10 and Later"
    4. Select Profile "Templates"
    5. Select Template Name "Custom"
    6. Click "Create"
    7. Under Name, enter **
    8. Optionally, enter a description
    9. Click "Next"
    Add a row for Block Read and Write access to specific file

    1. Click "Add"

    2. For Name, enter Block Read and Write access to specific file

    3. For Description, enter **

    4. For OMA-URI, enter ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyRules/%7B5038638c-9352-47bb-88df-8a659f0c02a7%7D/RuleData

    5. For Data type, select String (XML File)

    6. For Custom XML, select windows/device/Intune OMA-URI/block_read_and_write_access_to_specific_file{5038638c-9352-47bb-88df-8a659f0c02a7}.xml

    7. Click "Save"

    Add a row for Any Removable Storage and CD-DVD and WPD Group_0

    1. Click "Add"

    2. For Name, enter Any Removable Storage and CD-DVD and WPD Group_0

    3. For Description, enter **

    4. For OMA-URI, enter ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyGroups/%7B9b28fae8-72f7-4267-a1a5-685f747a7146%7D/GroupData

    5. For Data type, select String (XML File)

    6. For Custom XML, select windows/device/Intune OMA-URI/Any Removable Storage and CD-DVD and WPD Group.xml

    7. Click "Save"

    Add a row for Unauthorized File Group_0

    1. Click "Add"

    2. For Name, enter Unauthorized File Group_0

    3. For Description, enter **

    4. For OMA-URI, enter ./Vendor/MSFT/Defender/Configuration/DeviceControl/PolicyGroups/%7Be5f619a7-5c58-4927-90cd-75da2348a30f%7D/GroupData

    5. For Data type, select String (XML File)

    6. For Custom XML, select windows/device/Intune OMA-URI/Unauthorized File Group.xml

    7. Click "Save"

    Add a row for DefaultEnforcement

    1. Click "Add"

    2. For Name, enter DefaultEnforcement

    3. For Description, enter **

    4. For OMA-URI, enter ./Vendor/MSFT/Defender/Configuration/DefaultEnforcement

    5. For Data type, select Integer

    6. For Value, enter 2

    7. Click "Save"

    Add a row for DeviceControlEnabled

    1. Click "Add"

    2. For Name, enter DeviceControlEnabled

    3. For Description, enter **

    4. For OMA-URI, enter ./Vendor/MSFT/Defender/Configuration/DeviceControlEnabled

    5. For Data type, select Integer

    6. For Value, enter 1

    7. Click "Save"