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initial drafts
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Iaan D'Souza-Wiltshire
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---
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title: Use Windows Defender Exploit Guard to protect your corporate network
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description: Windows Defender Exploit Guard consists of features that can protect your network from malware and threat infection. It replaces EMET.
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keywords: emet, exploit guard, controlled folder access, network protection, exploit protection, attack surface reduction, hips, host intrusion prevention system
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title:
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keywords:
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search.product: eADQiWindows 10XVcnh
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ms.pagetype: security
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ms.prod: w10
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@ -32,7 +31,6 @@ msft.author: iawilt
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- Group Policy
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- PowerShell
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- Windows Management Instrumentation (WMI)
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- System Center Configuration Manager
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- Microsoft Intune
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- Windows Defender Security Center app
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---
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title: Use Windows Defender Exploit Guard to protect your corporate network
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description: Windows Defender Exploit Guard consists of features that can protect your network from malware and threat infection. It replaces EMET.
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keywords: emet, exploit guard, controlled folder access, network protection, exploit protection, attack surface reduction, hips, host intrusion prevention system
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title:
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keywords:
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search.product: eADQiWindows 10XVcnh
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ms.pagetype: security
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ms.prod: w10
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@ -15,7 +14,7 @@ msft.author: iawilt
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# Protect important folders with Controlled Folder Access
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# Protect devices from exploits with Windows Defender Exploit Guard
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**Applies to:**
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- Windows Defender Security Center app
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Controlled folder access helps you protect valuable data from malicious apps and threats, such as ransomware. It is part of Windows Defender Exploit Guard, which is itself a component in the new Windows Defender Advanced Threat Protection offering of security and threat prevention products.
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Exploit protection automatically applies a number of exploit mitigation techniques on both the operating system processes and on individual apps.
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It is part of Windows Defender Exploit Guard, which is itself a component in the new Windows Defender Advanced Threat Protection offering of security and threat prevention products.
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All apps (any executable file, including .exe, .scr, .dll files and others )are assessed by Windows Defender Antivirus, which then determines if the app is malicious or safe. If the app is determined to be malicious or suspicious, then it will not be allowed to make changes to any files in any protected folder.
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A notification will appear on the machine where the app attempted to make changes to a protected folder.
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Controlled folder access monitors the changes that apps make to files in certain protected folders.
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If an app attempts to make a change to these files, and the app is blacklisted by the feature, you’ll get a notification about the attempt.
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The protected folders include common system folders, and you can additional folders. You can also allow or whitelist apps to give them access to the protected folders.
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You configure these settings using the Windows Defender Security Center on an individual machine, and then export the configuration as an XML file that you can deploy to other machines. You can use Group Policy to distribute the XML file to multiple devices at once.
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## Requirements
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The following requirements must be met before controlled folder access will work:
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The following requirements must be met before exploit protection will work:
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Windows 10 version | Windows Defender Antivirus
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Insider Preview build 16232 or later (dated July 1, 2017 or later) | [Windows Defender AV real-time protection](../windows-defender-antivirus/configure-real-time-protection-windows-defender-antivirus.md) and [cloud-delivered protection](../windows-defender-antivirus/enable-cloud-protection-windows-defender-antivirus.md) must be enabled
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Windows 10 version | Windows Defender Advanced Threat Protection
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Insider Preview build 16232 or later (dated July 1, 2017 or later) | For full reporting you need a license for [Windows Defender ATP](../windows-defender-atp/windows-defender-advanced-threat-protection.md)
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**Use the Windows Defender Security app to enable controlled folder access:**
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## System-level mitigations
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What is the scope for these? Any app? Only Windows/system services? Signed apps? Known bad apps?
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System-level mitigations are applied to...
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You can set each of the following system-level mitigations to on, off, or the default value:
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Mitigation | Default value
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Control flow guard | On
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Data execution prevention | On
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Force randomization for images (Mandatory ASLR) | Off
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Randomize memory allocations (Bottom-up ASLR) | On
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Validate exception chains (SEHOP) | On
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Validate heap integrity | Off
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Generally, the default values should be used to...
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### Control flow guard
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### Data execution prevention
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### Force randomization for images (Mandatory ASLR)
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### Randomize memory allocations (Bottom-up ASLR)
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### Validate exception chains (SEHOP)
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### Validate heap integrity
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1. Configure
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2. Export
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3. Import
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### Configure system-level mitigations
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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@ -65,11 +108,125 @@ Insider Preview build 16232 or later (dated July 1, 2017 or later) | [Windows De
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3. Set the switch for the feature to **On**
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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**Use Group Policy to enable controlled folder access:**
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You can now export these settings as an XML file. This allows you to copy the configuration from one machine onto other machines.
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### Export system-level mitigations
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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You can import the XML file to other machines in your organization. You can do this individually for each machine by using the Windows Defender Security Center, or you can deploy a Group Policy setting for multiple devices.
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### Import system-level mitigations
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**Use the Windows Defender Security app to import system-level mitigations:**
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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**Use Group Policy to import and deploy system-level mitigations:**
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1. On your Group Policy management machine, open the [Group Policy Management Console](https://technet.microsoft.com/library/cc731212.aspx), right-click the Group Policy Object you want to configure and click **Edit**.
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3. In the **Group Policy Management Editor** go to **Computer configuration**.
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4. Click **Policies** then **Administrative templates**.
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5. Expand the tree to **Windows components > Windows Defender Antivirus > Exploit Guard**.
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6. Double-click the **Configure controlled folder access** setting and set the option to **Enabled**. In the options section you must specify one of the following:
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- **Enable** - Malicious and suspicious apps will not be allowed to make changes to files in protected folders. A notification will be provided in the Windows event log
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- **Disable (Default)** - The controlled folder access feature will not work. All apps can make changes to files in protected folders.
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- **Audit Mode** - If a malicious or suspicious app attempts to make a change to a file in a protected folder, the change will be allowed but will be recorded in the Windows event log. This allows you to assess the impact of this feature on your organization.
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>[!IMPORTANT]
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>To fully enable the controlled folder access feature, you must set the Group Policy option to **Enabled** and also select **Enable** in the options drop-down menu.
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## App-specific mitigations
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What is the scope for these? Any app? Only Windows/system services? Signed apps? Known bad apps?
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1. Configure
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2. Export
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3. Import
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### Configure app-specific mitigations
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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You can now export these settings as an XML file. This allows you to copy the configuration from one machine onto other machines.
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### Export app-specific mitigations
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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You can import the XML file to other machines in your organization. You can do this individually for each machine by using the Windows Defender Security Center, or you can deploy a Group Policy setting for multiple devices.
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### Import app-specific mitigations
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**Use the Windows Defender Security app to import app-specific mitigations:**
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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**Use Group Policy to import and deploy app-specific mitigations:**
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1. On your Group Policy management machine, open the [Group Policy Management Console](https://technet.microsoft.com/library/cc731212.aspx), right-click the Group Policy Object you want to configure and click **Edit**.
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@ -92,84 +249,7 @@ Insider Preview build 16232 or later (dated July 1, 2017 or later) | [Windows De
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## Protect additional folders
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Adding other folders to Controlled folder access can be handy, for example, if you don’t store files in the default Windows libraries or you’ve changed the location of the libraries away from the defaults.
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Controlled folder access applies to a number of system folders and default locations, including folders such as Documents, Pictures, Movies, and Desktop.
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You can add additional folders to be protected, but you cannot remove the default folders in the default list.
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Click Protected folders in the Controlled folder access area and enter the full path of the folder you want to monitor.
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You can also enter network shares and mapped drives, but environment variables and wildcards are not supported.
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**Use the Windows Defender Security app to protect additional folders:**
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Protected folders**
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4. Click **Add a protected folder** and follow the prompts to add apps.
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**Use Group Policy to protect additional folders:**
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1. On your Group Policy management machine, open the [Group Policy Management Console](https://technet.microsoft.com/library/cc731212.aspx), right-click the Group Policy Object you want to configure and click **Edit**.
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3. In the **Group Policy Management Editor** go to **Computer configuration**.
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4. Click **Policies** then **Administrative templates**.
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5. Expand the tree to **Windows components > Windows Defender Antivirus > Exploit Guard**.
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6. Double-click the **Configured protected folders** setting and set the option to **Enabled**. Click **Show** and enter each folder as Value? Or Value Name?
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> [!IMPORTANT]
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> Environment variables and wildcards are not supported.
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## Allow specifc apps to make changes to controlled folders
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You can specify if certain apps should always be considered safe and given write access to files in protected folders. Allowing apps can be useful if you’re finding a particular app that you know and trust is being blocked by the controlled folder access feature.
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**Use the Windows Defender Security app to whitelist specific apps:**
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1. Open the Windows Defender Security Center by clicking the shield icon in the task bar or searching the start menu for **Defender**.
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2. Click the **Virus & threat protection** tile (or the shield icon on the left menu bar) and then the **Virus & threat protection settings** label:
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3. Under the **Controlled folder access** section, click **Allow an app through Controlled folder access**
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4. Click **Add an allowed app** and follow the prompts to add apps.
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**Use Group Policy to whitelist specific apps:**
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1. On your Group Policy management machine, open the [Group Policy Management Console](https://technet.microsoft.com/library/cc731212.aspx), right-click the Group Policy Object you want to configure and click **Edit**.
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3. In the **Group Policy Management Editor** go to **Computer configuration**.
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4. Click **Policies** then **Administrative templates**.
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5. Expand the tree to **Windows components > Windows Defender Antivirus > Exploit Guard**.
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6. Double-click the **Configure allowed applications** setting and set the option to **Enabled**. Click **Show** and enter each app as Value? Or Value Name? what are the requirements? Have to be exe? Do you have to enter fully qualified path, or will it apply to any .exe with that name?
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## Review event logs for controlled folder access
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## Review event logs for exploit protection
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How do you see these event logs? Are they under specific codes/areas?
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@ -26,17 +26,6 @@ msft.author: iawilt
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- Enterprise security administrators
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**Manageability available with**
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- Group Policy
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- PowerShell
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- Windows Management Instrumentation (WMI)
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- System Center Configuration Manager
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- Microsoft Intune
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- Windows Defender Security Center app
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Windows Defender Exploit Guard is a new collection of tools and features that help you keep your network safe from exploits. Exploits are infection vectors for malware that rely on vulnerabilities in software.
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You can use Windows Defender EG to:
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