[!TIP] The keystone to good security hygiene is limiting your attack surface. Refer to the MDM section in this article for the OMA-URI to use for this example rule. On the Basics tab, enter a descriptive name, such as Configure Attack surface reduction ASR Rules. Rings are groups of machines radiating outward like non-overlapping tree rings. Open the Microsoft Intune admin center. For attack surface reduction rule GUIDS, see Per rule descriptions in the article: Attack surface reduction rules. Exclude files and paths from Attack Surface Reduction (ASR) rules. This will allow you to review logs and reports to analyze the rules impact and give you the opportunity to create any exclusions for your line-of-business apps, for example, before turning the rule on in block mode, or scrapping it entirely. Exclusions in Attack Surface Reduction rules in Block mode Defender for Endpoint includes numerous capabilities to help reduce your attack surfaces. In this guide, we will learn about the Attack Surface Reduction Rules in Intune. Vendors perform ongoing assessments of an organization's public-facing security posture. ASR rules can be found in Intune Device Configuration. There is just the general, and mandatory, rule that no liquids above a certain volume are allowed. Use advanced protection against ransomware. Now you will see all the ASR rules in one place. Its what you would call a HIPS (Host Intrusion Prevention System) solution, in industry lingo. Is there some magic trick to this that I'm missing? As of now, we provide you a total of 15 rules. ADMX_MicrosoftDefenderAntivirus Policy CSP - Windows Client Management Set-MpPreference will always overwrite the existing set of rules. Choose an existing ASR rule or create a new one. Attack surface reduction rules reference | Microsoft Learn I see the compliance policy in deployments in SCCM, but all of my devices are marked non-compliant with the CCMSS_M365A_Settings_DetectionExitCode Equals 0 Warning.. Powershell (get-mppreference).attacksurfacereductiononlyexclusions on one of the clients includes the SimonPro.exe entry. 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: As with any new, large-scale implementation that could affect your line of business, it is important to plan and implement it in a methodical way. #5 What are the specific requirements for enabling ASR rules? The major drawback of the free version is its limited options for management and reporting. Using Intune, it is possible to configure an exclusion for a specific ASR rule. Select Show and enter each file or folder in the Value name column. 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. Core Microsoft components, such as operating system files or Office applications, reside in a global exclusion list maintained as part of Defender. You can also select Import to import a CSV file that contains files and folders to exclude from ASR rules. This rule detects suspicious properties within an obfuscated script. Attack surface reduction (ASR) rules reference - GitHub Now lets go to Group Policy and try to do the same as above. From here go to Create Policy and Select Windoes 10 and later as the Platform and Attarck Surface Reduction Rules as the Profile and hit Create. Its as simple as choosing which actions you want to set for the rule you want to enable. Attack Surface Reduction rules will be available under Microsoft Defender Exploit Guard. The Add Row OMA-URI Settings opens. In step 6 Review + create, review the settings and information you've selected and entered, and then select Create. If you're interested in ASR or attack surface management (ASM), it's worth learning about what these tools do and where they overlap with current inventory and vulnerability management products. subversion or leverage, but also things like Webmail, script, WMI, LSASS, and much more. Enter 0 in the Value column for each item. Added in Windows 10, version 1709. Windows Defender ATP Attack Surface Reduction - RocketCyber The next step would be to add that filename along with its full path to the configuration mechanism of choice to exclude it from being blocked, and re-run the test to see if the exclusion successfully took effect. On your Group Policy management computer, open the Group Policy Management Console, right-click the Group Policy Object you want to configure and select Edit. Attack surface reduction (ASR) rules report - GitHub Vulnerability management tools scan external, and sometimes internal, systems to determine if an asset is vulnerable to attack. Plus, thanks to DevOps and microservices, an organization's attack surface might change rapidly as new services are added and new code is pushed to production on a daily or even hourly basis. How to use Windows Defender Attack Surface Reduction rules It's time to get the attack surface under control. Reading directly from Local Security Authority Subsystem (LSASS) process can be a security risk, since it might expose corporate credentials. Attack surface reduction rules (ASR) Service settings: Microsoft 365 Defender portal. More information on how to use wildcards in ASR rules is available here. Select OK on the three configuration panes. If ASR rules are detecting files that you believe shouldn't be detected, you should use audit mode first to test the rule. lightbox="images/mem01-create-profile.png"::: In Create a profile, in the following two drop-down lists, select the following: :::image type="content" source="images/mem02-profile-attributes.png" alt-text="The rule profile attributes in the Microsoft Intune admin center portal." Here's a screenshot from the Microsoft 365 Defender portal (under Reports > Devices > Attack surface reduction). For example, an application update may now require an exclusion or multiple alerts from a user clicking on email executable attachments can indicate additional training is required. Join discussions at the Microsoft community and Windows Defender Security Intelligence. Updates to Attack Surface Reduction Rules in Windows 10 1803 An attack surface management program can help. Here is a screenshot of the ASR rules list available in Intune. Thats a wrap for the first blog post in this series on attack surface reduction rules! It is an additional layer of expertise and optics that Microsoft customers can utilize to augment security operations capabilities as part of Microsoft 365. Attack surface refers to the cumulative vulnerabilities or points of entry that an attacker can exploit to launch a cyberattack against a system, network, or application. Open the Configure Attack Surface Reduction rules policy and add the and the action value. Select the application you want to exclude and click on "Add Exclusion or Get exclusion details": The "Add Exclusions" button takes you right to Microsoft Defender for Endpoint > Attack Surface Reduction Profiles. Attack Surface Reduction. You can enable attack surface reduction rules by using any of these methods: Enterprise-level management such as Intune or Microsoft Configuration Manager is recommended. #1 How can I configure/enable ASR rules? As for Intune and Configuration Manager, both platforms already have a built-in list of ASR rules; therefore, you dont need to know the GUIDs, nor what each action value represents. What is attack surface management and why is it necessary? A modern organization's attack surface extends anywhere business data flows or is stored and all the potential entry points to the corporate network. Review the reporting page in the Microsoft 365 Defender portal; see Threat protection . If you've already registered, sign in. 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. What is attack surface management and why is it How to reduce risk with cloud attack surface Google interconnects with rival cloud providers, How to interact with network APIs using cURL, Postman tools, Modular network design benefits and approaches. It looks like you're using an Adblocker. Such exclusions are applied to all attack surface reduction rules. Provide a policy name, e.g., ASR rules. Note: Please be aware that Microsoft rebranded Windows Defender Antivirus to Microsoft Defender Antivirus in 20H1. Using Intune, you can create and configure ASR rules for your organization. attack surface reduction rules best practices ASR rules advanced hunting ASR rules event viewer ASR rules deployment steps 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. SEC-LABS R&D > Protect > Updates to Attack Surface Reduction Rules in Windows 10 1803. Files and Folders to exclude from Attack Surface Reduction rules - Click on Set and specify any files or . Find out more about the Microsoft MVP Award Program. Sometimes, legitimate applications exhibit software behaviors that could be blocked by attack surface reduction rules. Hello again and welcome to the second part in our blog series on demystifying attack surface reduction (ASR) rules. In the following example, the first two rules will be enabled, the third rule will be disabled, and the fourth rule will be enabled in audit mode: You can also use the Add-MpPreference PowerShell verb to add new rules to the existing list. By limiting child processes that can be launched by Outlook to only processes with well-defined functionality, this attack surface reduction rule confines a potential exploit or a social engineering threat from further infecting or compromising the system. While you are running the rules in audit mode, you can identify any line-of-business applications that might get blocked erroneously, and exclude them from ASR. Such behaviors include: Launching executable files and scripts that attempt to download or run . Before the cloud, the corporate attack surface was often defined as anything outside the firewall, but that definition doesn't work well today. Windows Defender ATP Attack Surface Reduction Learn how to use ATP ASR rules on Windows Defender to significantly improve your security with a few basic rules Microsoft has made big advances with the Windows Defender technology shipped on Windows 10 and Windows Server 2016. Our recommended practice to deploy attack surface reduction rules is to first implement the rule in audit mode. Attack Surface Reduction rules - exclusions not working? AI transparency: What is it and why do we need it? Best practices and the latest news on Microsoft FastTrack, The employee experience platform to help people thrive at work, Expand your Azure partner-to-partner network, Bringing IT Pros together through In-Person & Virtual events. ASR rules offer a broad range of built-in rules to secure your endpoint, covering areas like Office applications (think macros, DDEs, etc.) Windows Defender ATP. One way to do this is with ASR. Attack surface reduction rules from the following profiles are evaluated for each device to which the rules apply: Devices > Configuration policy > Endpoint protection profile >. Review the settings and select Next to create the policy. To learn more about Windows licensing, see Windows 10 Licensing and get the Volume Licensing guide for Windows 10. Add Row closes. Create a new profile and select Windows 10 Endpoint Protection as a platform and Endpoint Protection under profile. Take a look at detailed guide on how to use attack surface reduction capabilities. Block persistence through WMI event subscription. These advanced capabilities aren't available with an E3 license, but you can still use Event Viewer to review attack surface reduction rule events. Tamper Protection. Use cases include getting interface information and Modular network design is a strategic way for enterprises to group network building blocks in order to streamline network As the use of AI models has evolved and expanded, the concept of transparency has grown in importance. PowerShell Script to deploy ASR Rules to Intune - Call4Cloud At the device level, select Configuration from the Attack surface reduction rules pane. Rules can be enabled in audit with Group Policy, SCCM, or PowerShell. Block executable files from running unless they meet a prevalence, age, or trusted list criteria. Then select Create if you're creating a new endpoint protection file or Save if you're editing an existing one. We recommend a layered approach for device control security, which incorporates multiple avenues of protection, including each of the above. In Value, type or paste the GUID value, the = sign and the State value with no spaces (GUID=StateValue). What are the 4 different types of blockchain technology? 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. Keeping attackers away from corporate assets means keeping a constant vigilance over the organization's attack surface. This rule prevents attacks by blocking Adobe Reader from creating processes. Tamper Protection. And, are they available in all Windows versions? ASR rules are originally introduced as one of the four main features of Windows Defender Exploit Guard. You'll find it here: There no pre-requisites. Block Office communication application from creating child processes. They are a security nightmare. In Microsoft Defender ATP, ASR includes the following: You can learn about all these capabilities in our documentation. Sharing best practices for building any app with .NET. Keeping the attack surface as small as possible is a basic security . In Microsoft Configuration Manager, go to Assets and Compliance > Endpoint Protection > Windows Defender Exploit Guard. Select Configure Attack surface reduction rules and select Enabled. For this some conditions must be met: [!WARNING] In the Configuration settings pane, select Attack Surface Reduction and then select the desired setting for each ASR rule. Attack surface reduction, hips, host intrusion prevention system, protection rules, anti-exploit, antiexploit, exploit, infection prevention, enable, turn on, Cannot retrieve contributors at this time. Some vendors offer ASM tools, which combine aspects of these services into a single console. What does the new Microsoft Intune Suite include? In the Group Policy Management Editor, go to Computer configuration and select Administrative templates. If you want to come back and view all the blogs in this series, you can follow it here. Use advanced protection against ransomware. Previous versions of Windows 10 will still reference *Windows Defender*. This will protect against malware exploitation of the behavior. We highly recommend you reading each rule specific information and/or warnings, which are available in our public documentation. The Block Office Communication Applications from Creating Child Processes rule protects against attacks that attempt to abuse the Outlook email client. The complete list of rule name to GUID mapping is available here. To enable non-malicious applications critical to your business, exclusions can be used if they are flagged as violating an attack surface reduction rule. Attack Surface Reduction Rules. You signed in with another tab or window. Mobile platform technology giant launches immersive technology designed to create a cross-device, extended and augmented reality All Rights Reserved, Exclusions, when applied, are honored by other Windows Defender ATP exploit mitigation features including Controlled folder access and Network protection, in addition to attack surface reduction rules. Create a new profile and select Windows 10 Endpoint Protection as a platform and Endpoint Protection under profile. Attack surface reduction is a technique to remove or constrain exploitable behaviors in your systems. It is important to note that DDE, and DDEAUTO, are legacy, inter-process communication features available since 1987. Reduce attack surfaces with attack surface reduction rules for Windows Right now, all but 2 specific rules do not support exclusions. Well further explore this in the next future series of this blog. Please note that Microsoft brought together Intune and Configuration Manager under a unified platform that is called Microsoft Endpoint Manager. Demystifying attack surface reduction rules - Part 3 Attarck Surface Reduction rules can be found under Manage section in Endpoint Security . See. This ASR rule blocks processes created through PsExec and WMI from running. For more information, please refer to Microsoft Endpoint Manager Overview. Configure all Attack Surface Reduction Rules via custom configuration We have millions of customers that still dearly depend on Office macros to run their businesses. How to Use Group Policy for Windows Attack Surface Reduction After the policy is created, select Close. . There is a known issue with the applicability of Attack Surface Reduction on Server OS versions which is marked as compliant without any actual enforcement. A tag already exists with the provided branch name. #1 What is the difference between ASR and ASR rules? Demystifying attack surface reduction rules - Part 2 You can exclude files and folders from being evaluated by most attack surface reduction rules. In this blog . 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. The result is that the first rule is applied, and subsequent non-conflicting rules are merged into the policy. Attack surface reduction rules target certain software behaviors that are considered risky. Microsoft Defender for Endpoint Plan 2. Various features in Defender for Endpoint might help you decrease your attack surfaces. Click on "Configure Attack Surface Reduction rules". I've been adding trusted items to the 'Exclude files and paths from Attack Surface Reduction Rules' item, but I'm still getting audit events for those applications. There are two ways to analyze the ADR rules and reporting details: Get the most recent information on Configuration Manager, Intune, Windows 11, Windows 365, Autopilot, Azure, Software Reviews, and much more by subscribing to the newsletter. Configure attack surface reduction in Microsoft Defender - 4sysops