attack surface reduction rules intune

To create a new one, select Create profile and enter information for this profile. Office VBA enables Win32 API calls. Attack surface reduction is not only included in paid products, such as Defender for Endpoint, but is also part of Windows 10/11 and Windows Server, although some rules are not supported on older versions. Any of these methods will work: Microsoft Intune Mobile Device Management (MDM) Microsoft Endpoint Configuration Manager Group Policy PowerShell If you want to add to the existing set, use Add-MpPreference instead. Exploit protection can help protect devices from malware that use exploits to spread and infect. Block bluetooth connections Attack Surface Reduction. Be sure to enter OMA-URI values without spaces. App locker application control For example: Policy merge evaluates the lists of setup classes that were configured in each instance of Allow hardware device installation by setup classes that applies to a device. Intune name: Process creation from Adobe Reader (beta), GUID: 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c, Dependencies: Microsoft Defender Antivirus. Intune name: Office apps launching child processes, Configuration Manager name: Block Office application from creating child processes, GUID: d4f940ab-401b-4efc-aadc-ad5f3c50688a. How to Configure Attack Surface Reduction (ASR) Rules using MEM Protect devices from exploits, This ASR rule is controlled via the following GUID: d1e49aac-8f56-4280-b9ba-993a6d77406c, Block untrusted and unsigned processes that run from USB When set to Yes, you can configure the following settings: IP ranges How to enable attack surface reduction rules from Intune?Deployment method and modes for Attack Surface Reduction Rules - https://youtu.be/dLrn6w5kzFAWhat is. This article provides information about Microsoft Defender for Endpoint attack surface reduction (ASR) rules: ASR rules are categorized as one of two types: For the easiest method to enable the standard protection rules, see: Simplified standard protection option. Endpoint security > Attach surface reduction > Windows 10 and later (ConfigMgr), Attack Surface Reduction Rules (ConfigMgr), Configuration Manager current branch version 2006 or later. Taskmgr.exe, DropboxUpdate.exe, svchost.exe, .). Type powershell in the Start menu, right-click Windows PowerShell and select Run as administrator. After the profile is created, any devices to which the policy should apply will have Microsoft Defender Application Guard enabled. If you assign a device two different ASR policies, the way conflict is handled is rules that are assigned different states, there is no conflict management in place, and the result is an error. Protect devices from exploits, This ASR rule is controlled via the following GUID: 92E97FA1-2EDF-4476-BDD6-9DD0B4DDDC7B, Block Office communication apps from creating child processes Therefore, GPO is the choice. Using the Set-MpPreference cmdlet will overwrite the existing list. CSP: Bluetooth/AllowDiscoverableMode, Block bluetooth pre-pairing When the allow button is clicked, the block will be suppressed for 24 hours. Attack surface reduction, or ASR, is an umbrella term for all the built-in and cloud-based security features Windows 10 offers that help to minimize the surface of attack, or areas of entry, for an attacker. CSP: CertificateThumbprints. Now the Server SKU will be marked as compliant for an Attack Surface Reduction rule, only after enforcement of the rule. Attack surface reduction (ASR) rules deployment overview This rule prevents scripts from launching potentially malicious downloaded content. You must enable cloud-delivered protection to use this rule. Configuring Microsoft Defender for Endpoint (MDE) attack surface reduction (ASR) rules can help. November 4, 2022 by Jitesh Kumar Learn how to configure Attack Surface Reduction ASR Rules in Intune. After 24 hours, the end-user will need to allow the block again. For more details on the current versions and how to update the different Microsoft Defender Antivirus components visit Microsoft Defender Antivirus platform support. Do one of the following: In step 4 Assignments, in Included Groups, for the groups that you want this rule to apply, select from the following options: In Excluded groups, select any groups that you want to exclude from this rule, and then select Next. CSP: Browser/PreventSmartScreenPromptOverrideForFiles, Disallow Exploit Protection Override You can set attack surface reduction rules for devices that are running any of the following editions and versions of Windows: To use the entire feature-set of attack surface reduction rules, you need: Although attack surface reduction rules don't require a Windows E5 license, with a Windows E5 license, you get advanced management capabilities including monitoring, analytics, and workflows available in Defender for Endpoint, as well as reporting and configuration capabilities in the Microsoft 365 Defender portal. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. For rules with the "Rule State" specified: Warn mode is a block-mode type that alerts users about potentially risky actions. If you use this setting, AppLocker CSP behavior currently prompts end user to reboot their machine when a policy is deployed. Typically, you can enable the standard protection rules with minimal-to-no noticeable impact to the end user. With this change you can no longer create new versions of the old profile and they are no longer being developed. Type one of the following cmdlets. Windows 10 and later (ConfigMgr): Use this platform for policy you deploy to devices managed by Configuration Manager. Select Show and enter the rule ID in the Value name column and your chosen state in the Value column as follows: To exclude files and folders from ASR rules, select the Exclude files and paths from Attack surface reduction rules setting and set the option to Enabled. Review the settings and select Next to create the policy. CSP: Browser/PreventSmartScreenPromptOverride, Block unverified file download Block write access to removable storage Find the endpoint security policies for attack surface reduction under Manage in the Endpoint security node of the Microsoft Intune admin center. In Add Row, do the following: In Description, type a brief description. You can also convert and import an existing EMET configuration XML file into an exploit protection configuration XML. CSP: ControlledFolderAccessProtectedFolders. It also protects against Outlook rules and forms exploits that attackers can use when a user's credentials are compromised. select the Exclude files and paths from Attack surface reduction rules setting and set the option to Enabled. Block Adobe Reader from creating child processes GPO In step 5 Applicability Rules for the following settings, do the following: In Rule, select either Assign profile if, or Don't assign profile if, In Property, select the property to which you want this rule to apply, In Value, enter the applicable value or value range. The following is a sample for reference, using GUID values for Attack surface reduction rules reference. My question is without using some hash or application GUID, what is to stop someone from simply renaming a file or placing it within an excluded path? Endpoints are using Microsoft Defender Antivirus as the sole antivirus protection app. In the Endpoint protection pane, select Windows Defender Exploit Guard, then select Attack Surface Reduction. For attack surface reduction rule GUIDS, see Per rule descriptions in the article: Attack surface reduction rules. CSP: ControlledFolderAccessAllowedApplications. However, if you have another license, such as Windows Professional or Windows E3 that doesn't include advanced monitoring and reporting capabilities, you can develop your own monitoring and reporting tools on top of the events that are generated at each endpoint when ASR rules are triggered (for example, Event Forwarding). The file is prevalent enough to not be considered as ransomware. Demystifying attack surface reduction rules - Part 1 For example, you can select the checkbox of one or more certificate thumbprint entries and then Delete those entries from the profile with a single action. There are no known legitimate business purposes for using code injection. For Attack surface reduction policy, the following profiles support policy merge: Device control profiles support policy merge for USB Device IDs. This rule also blocks execution of untrusted files that may have been saved by Office macros that are allowed to run in Office files. Intune name: Flag credential stealing from the Windows local security authority subsystem, Configuration Manager name: Block credential stealing from the Windows local security authority subsystem, GUID: 9e6c4e1f-7d60-472f-ba1a-a39ef669e4b2. Beginning in April 2022, new profiles for Attack surface reduction policy have begun to release. CSP: Browser/PreventSmartScreenPromptOverride, Prevent Smart Screen Prompt Override (Device) However, consider using each rule for either reusable settings groups or to manage settings you add directly to the rule. Windows 10, Windows 11, and Windows Server: Use this platform for policy you deploy to devices managed through Security Management for Microsoft Defender for Endpoint. CSP: AttackSurfaceReductionOnlyExclusions. Intune name: Process creation from Office communication products (beta), Configuration Manager name: Not available, GUID: 26190899-1602-49e8-8b27-eb1d0a1ce869. Set up tenant attach for Configuration Manager devices - To support deploying attack surface reduction policy to devices managed by Configuration Manager, configure tenant attach. How to use Windows Defender Attack Surface Reduction rules In the Group Policy Management Editor, go to Computer configuration and select Administrative templates. By default the state of this rule is set to block. This guide provides images and examples to help you decide how to configure ASR rules; these images and examples might not reflect the best configuration options for your environment. We hope it will assist other security teams who are considering a deployment. View details for the settings in profiles for Attack surface reduction profiles. Intune name: Advanced ransomware protection, Configuration Manager name: Use advanced protection against ransomware, GUID: c1db55ab-c21a-4637-bb3f-a12568109d35, More info about Internet Explorer and Microsoft Edge, Microsoft Microsoft 365 Defender for Endpoint Plan 1, ASR rules supported operating system versions, ASR rules supported configuration management systems, Per ASR rule alert and notification details, Attack surface reduction (ASR) rules deployment guide, Block Adobe Reader from creating child processes, Block process creations originating from PSExec and WMI commands, Block credential stealing from the Windows local security authority subsystem (lsass.exe), Block Office applications from creating executable content, Block Office applications from injecting code into other processes, Block Office communication application from creating child processes, Test attack surface reduction (ASR) rules, New functionality in the modern unified solution for Windows Server 2012 R2 and 2016 Preview, Block abuse of exploited vulnerable signed drivers, Block all Office applications from creating child processes, Block executable content from email client and webmail, Block executable files from running unless they meet a prevalence, age, or trusted list criterion, Block execution of potentially obfuscated scripts, Block JavaScript or VBScript from launching downloaded executable content, Block persistence through Windows Management Instrumentation (WMI) event subscription, Block untrusted and unsigned processes that run from USB, Use advanced protection against ransomware, Onboard Windows Servers to the Defender for Endpoint service, Block persistence through WMI event subscription, System Center Configuration Manager (SCCM) CB 1710, calling Win32 APIs to launch malicious shellcode, Attack surface reduction (ASR) rules deployment overview, Plan attack surface reduction (ASR) rules deployment, Enable attack surface reduction (ASR) rules, Operationalize attack surface reduction (ASR) rules, Attack surface reduction (ASR) rules report, Exclusions for Microsoft Defender for Endpoint and Microsoft Defender Antivirus, ASR rules with combinations are used to surface alerts (toast notifications) on Microsoft Defender for Endpoint only for devices at cloud block level, EDR alerts are generated for ASR rules in the specified states, for devices at cloud block level, Executable files (such as .exe, .dll, or .scr), Script files (such as a PowerShell .ps1, Visual Basic .vbs, or JavaScript .js file). Previously, if two policies included conflicts for a single setting, both policies were flagged as being in conflict, and no settings from either profile would be deployed. Instead, use the checkboxes to help you manage the entries that have been added to the profile. You can also set a rule in warn mode via PowerShell by specifying the AttackSurfaceReductionRules_Actions as "Warn". See, When deployed through Group Policy or PowerShell, exclusions apply to all ASR rules. Neutral resources Block execution of potentially obfuscated scripts (js/vbs/ps) Application control - Application control settings can help mitigate security threats by restricting the applications that users can run and the code that runs in the System Core (kernel). Configure attack surface reduction in Microsoft Defender - 4sysops Attack surface reduction measures focus on actions that malware and malicious software commonly take to infect computers, such as: executable files and scripts used in Office applications or web mail that attempt to download or run files obfuscated. ASR can be configured by enabling the ASR rules in the device endpoint manager. Block Vulnerable Signed Drivers Using Intune ASR Rules Attack surface reduction rule merge behavior is as follows: This section provides configuration details for the following configuration methods: The following procedures for enabling ASR rules include instructions for how to exclude files and folders. Reducing your attack surface means protecting your organization's devices and network, which leaves attackers with fewer ways to attack. Attack surface reduction rules by type ASR rules are categorized as one of two types: Standard protection rules: Are the minimum set of rules which Microsoft recommends you always enable, while you are evaluating the impact and configuration needs of the other ASR rules. To learn more, see Application Guard in the Microsoft Defender for Endpoint documentation. Manage settings that can block unsigned scripts and MSIs, and restrict Windows PowerShell to run in Constrained Language Mode. Exclude files and paths from attack surface reduction rules Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. You can use Import to specify a .CSV file that contains multiple thumbprint entries that are all added to the profile at the same time. These cloud protection services, also referred to as Microsoft Advanced Protection Service (MAPS), enhances standard real-time protection, arguably providing the best antivirus defense. CSP: RemovableDiskDenyWriteAccess, Scan removable drives during full scan You use the Windows Security app or PowerShell to create a set of mitigations (known as a configuration). This rule protects against social engineering attacks and prevents exploiting code from abusing vulnerabilities in Outlook. Internal proxy servers The result is that the first rule is applied, and subsequent non-conflicting rules are merged into the policy. Windows 10 and later - Use this platform for policy you deploy to devices managed with Intune. These (as far as I know) are specific to the paid version of MS Defender. When a new profile becomes available, it uses the same name of the profile it replaces and includes the same settings as the older profile but in the newer settings format as seen in the Settings Catalog. Expand the tree to Windows components > Microsoft Defender Antivirus > Microsoft Defender Exploit Guard > Attack surface reduction. Device control profiles support policy merge for USB device IDs. Script obfuscation is a common technique that both malware authors and legitimate applications use to hide intellectual property or decrease script loading times. CSP: DmaGuard/DeviceEnumerationPolicy. To avoid conflicts, combine the configurations for ASR Only Per Rule Exclusions into a single ASR policy. Rules in any other mode won't generate toast notifications. In this blog . By default, they're not configured, so you're not protected against more sophisticated attacks! CSP: AllowInstallationOfMatchingDeviceSetupClasses, Allow hardware device installation by device instance identifiers. For Customers who are using a non-Microsoft HIPS and are transitioning to Microsoft Defender for Endpoint attack surface reduction rules: Microsoft advises customers to run their HIPS solution side-by-side with their ASR rules deployment until the moment you shift from Audit to Block mode. Click Next. Profile: App and browser isolation Profile: Application control Profile: Attack surface reduction rules Profile: Device control Profile: Exploit protection Profile: Web protection (Microsoft Edge Legacy) CSP: AllowInstallationOfMatchingDeviceIDs. memdocs/endpoint-protection-windows-10.md at main - GitHub Attackers might attempt to use Office apps to migrate malicious code into other processes through code injection, so the code can masquerade as a clean process. Microsoft Defender Antivirus must be enabled and configured as primary anti-virus solution, and must be in the following mode: Microsoft Defender Antivirus must not be in any of the following modes: See Cloud-delivered protection and Microsoft Defender Antivirus for more. To have a driver examined, use this Web site to Submit a driver for analysis. By starting with a small, controlled group, you can limit potential work disruptions as you expand your deployment across your organization. ASR polices do not support merge functionality for ASR Only Per Rule Exclusions and a policy conflict can result when multiple polices that configure ASR Only Per Rule Exclusions for the same device conflict. Step 2 Configuration settings opens. Select Next. Before you start, review Overview of attack surface reduction, and Demystifying attack surface reduction rules - Part 1 for foundational information. Test attack surface reduction (ASR) rules - GitHub Expand the dropdown, select Add, and then specify Internal proxy servers. Expanding support for Attack surface reduction rules with Microsoft Intune See, Exclusions can be added based on certificate and file hashes, by allowing specified Defender for Endpoint file and certificate indicators. CSP: AllowWindowsDefenderApplicationGuard. Expand the dropdown, select Add, and then specify a lower address and then an upper address. CSP: ClipboardSettings. Reduce attack surfaces with attack surface reduction rules, This ASR rule is controlled via the following GUID: 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c, Block Office applications from injecting code into other processes Microsoft Defender Antivirus works seamlessly with Microsoft cloud services. When implementing ASR exclusion within Intune you are given options to exclude folders and files from the rules you set. Protect devices from exploits. You can then set the individual state for each rule in the options section. View the settings you can configure in profiles for Attack surface reduction policy in the endpoint security node of Intune as part of an Endpoint security policy. CSP: DataProtection/AllowDirectMemoryAccess. Network domains This rule prevents Outlook from creating child processes, while still allowing legitimate Outlook functions. For Profile type, select Attack surface reduction rules. When you set an applicable setting in an attack surface reduction rule profile to anything other than Not configured, Intune presents the option to use ASR Only Per Rule Exclusions for that individual setting. If ASR rules are detecting files that you believe shouldn't be detected, you should use audit mode first to test the rule. Choose what copy and paste actions are allowed from the local PC and an Application Guard virtual browser. Enter 0 in the Value column for each item. In this blog, we discuss the two attack surface reduction rules introduced in the most recent release of Windows and cover suggested deployment methods and best practices. This separation can help simplify future configurations or changes you might make. Image 1: Exploit Guard features. CSP: Bluetooth/AllowAdvertising, Block bluetooth proximal connections You can then export this configuration as an XML file and share it with multiple machines on your network so they all have the same set of mitigation settings. Warn mode is available for most of the ASR rules. Users might have to restart their devices in order for protection to be in place. Where: Select Save. In Create a profile, in the following two drop-down lists, select the following: The Custom template tool opens to step 1 Basics. Microsoft Defender for Endpoint provides multiple monitoring and control features to help prevent threats in unauthorized peripherals from compromising your devices. This deployment collection provides information about the following aspects of MDE ASR rules: As with any new, wide-scale implementation which could potentially impact your line-of-business operations, it is important to be methodical in your planning and implementation. By starting with a small, controlled group, you can limit potential work disruptions as you expand your deployment across your organization. Web protection stops access to: To learn more, see Web protection in the Microsoft Defender for Endpoint documentation. More info about Internet Explorer and Microsoft Edge, Use wildcards in the file name and folder path or extension exclusion lists, Block abuse of exploited vulnerable signed drivers, ./Vendor/MSFT/Policy/Config/Defender/AttackSurfaceReductionRules, ./Vendor/MSFT/Policy/Config/Defender/AttackSurfaceReductionOnlyExclusions, Microsoft Defender Antivirus as primary AV (real-time protection on).
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attack surface reduction rules intune 2023