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defender-endpoint/attack-surface-reduction-rules-reference.md

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- m365-security
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- tier2
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- mde-asr
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ms.date: 11/05/2024
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ms.date: 11/10/2024
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search.appverid: met150
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---
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Dependencies: Microsoft Defender Antivirus
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Known issues: These applications and "Block credential stealing from the Windows local security authority subsystem" rule, are incompatible:
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|Application name|For information|
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| -------- | -------- |
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|Quest Dirsync Password Sync|[Dirsync Password Sync isn’t working when Windows Defender is installed, error: "VirtualAllocEx failed: 5" (4253914)](https://support.quest.com/kb/4253914/dirsync-password-sync-isn-t-working-when-windows-defender-is-installed-error-virtualallocex-failed-5)|
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For technical support, contact the software vendor.
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### Block executable content from email client and webmail
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This rule blocks email opened within the Microsoft Outlook application, or Outlook.com and other popular webmail providers from propagating the following file types:
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Dependencies: Microsoft Defender Antivirus
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Known issues: These applications and "Block Office applications from injecting code into other processes" rule, are incompatible:
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|Application name|For information|
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| -------- | -------- |
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|Avecto (BeyondTrust) Privilege Guard|[September-2024 (Platform: 4.18.24090.11 | Engine 1.1.24090.11)](/defender-endpoint/microsoft-defender-antivirus-updates). |
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|Heimdal security|n/a|
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For technical support, contact the software vendor.
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### Block Office communication application from creating child processes
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This rule prevents Outlook from creating child processes, while still allowing legitimate Outlook functions. This rule protects against social engineering attacks and prevents exploiting code from abusing vulnerabilities in Outlook. It also protects against [Outlook rules and forms exploits](https://blogs.technet.microsoft.com/office365security/defending-against-rules-and-forms-injection/) that attackers can use when a user's credentials are compromised.

defender-endpoint/configure-cloud-block-timeout-period-microsoft-defender-antivirus.md

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manager: deniseb
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ms.subservice: ngp
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ms.topic: conceptual
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ms.date: 07/25/2024
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ms.date: 11/10/2024
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ms.collection:
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- m365-security
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- tier2
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3. Select (or create) an antivirus policy.
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4. In the **Configuration settings** section, expand **Cloud protection**. Then, in the **Microsoft Defender Antivirus Extended Timeout In Seconds** box, specify the more time, in seconds, from 1 second to 50 seconds. Whatever you specify is added to the default 10 seconds.
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4. In the **Configuration settings** section, scroll down to **Cloud Extended Timeout** and specify the timeout, in seconds, from 0 to 50 seconds. Whatever you specify is added to the default 10 seconds.
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5. (This step is optional) Make any other changes to your antivirus policy. (Need help? See [Settings for Microsoft Defender Antivirus policy in Microsoft Intune](/mem/intune/protect/antivirus-microsoft-defender-settings-windows).)
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defender-endpoint/enable-cloud-protection-microsoft-defender-antivirus.md

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ms.date: 04/03/2024
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ms.date: 11/10/2024
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| Task | Steps |
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|---------|---------|
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| Create a new policy | 1. For **Platform**, select **Windows 10, Windows 11, and Windows Server**. <br/><br/>2. For **Profile**, select **Microsoft Defender Antivirus**.<br/><br/>3. On the **Basics** page, specify a name and description for the policy, and then choose **Next**.<br/><br/>4. In the **Defender** section, find **Allow Cloud Protection**, and set it to **Allowed**. Then choose **Next**. <br/><br/>5. Scroll down to **Submit Samples Consent**, and select one of the following settings:<br/>- **Send all samples automatically**<br/>- **Send safe samples automatically**<br/><br/>6. On the **Scope tags** step, if your organization is using [scope tags](/mem/intune/fundamentals/scope-tags), select the tags you want to use, and then choose **Next**.<br/><br/>7. On the **Assignments** step, select the groups, users, or devices that you want to apply this policy to, and then choose **Next**.<br/><br/>8. On the **Review + create** step, review the settings for your policy, and then choose **Create**. |
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| Create a new policy | 1. For **Platform**, select **Windows**. <br/><br/>2. For **Profile**, select **Microsoft Defender Antivirus**.<br/><br/>3. On the **Basics** page, specify a name and description for the policy, and then choose **Next**.<br/><br/>4. In the **Defender** section, find **Allow Cloud Protection**, and set it to **Allowed**.<br/><br/>5. Scroll down to **Submit Samples Consent**, and select one of the following settings:<br/>- **Send all samples automatically**<br/>- **Send safe samples automatically**<br/><br/>6. On the **Scope tags** step, if your organization is using [scope tags](/mem/intune/fundamentals/scope-tags), select the tags you want to use, and then choose **Next**.<br/><br/>7. On the **Assignments** step, select the groups, users, or devices that you want to apply this policy to, and then choose **Next**.<br/><br/>8. On the **Review + create** step, review the settings for your policy, and then choose **Create**. |
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| Edit an existing policy | 1. Select the policy that you want to edit.<br/><br/>2. Under **Configuration settings**, choose **Edit**.<br/><br/>3. In the **Defender** section, find **Allow Cloud Protection**, and set it to **Allowed**.<br/><br/>4. Scroll down to **Submit Samples Consent**, and select one of the following settings:<br/>- **Send all samples automatically**<br/>- **Send safe samples automatically**<br/><br/>5. Select **Review + save**. |
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> [!TIP]

defender-endpoint/network-protection-macos.md

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description: Protect your network by preventing macOS users from accessing known malicious and suspicious network addresses
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- Microsoft Edge for macOS browser
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> [!NOTE]
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> Microsoft Edge for macOS does not currently support web content filtering, custom indicators, or other enterprise features. However, network protection provides this protection to Microsoft Edge for macOS if network protection is enabled.
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> SmartScreen in Microsoft Edge for macOS does not currently support web content filtering, custom indicators, or other enterprise features. However, network protection provides this protection to Microsoft Edge for macOS if network protection is enabled.
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## Overview
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defender-endpoint/specify-cloud-protection-level-microsoft-defender-antivirus.md

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4. Next to **Configuration settings**, choose **Edit**.
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5. Scroll down to **Cloud Block Level**, and select one of the following:
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- **High plus**: Uses the **High** level and applies extra protection measures (might affect client performance).
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- **Zero tolerance**: Blocks all unknown executables.
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- **High Plus**: Uses the **High** level and applies extra protection measures (might affect client performance).
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- **Zero Tolerance**: Blocks all unknown executables.
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6. Choose **Next**, and then choose **Save**.
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> Need some help? See the following resources:

defender-endpoint/troubleshoot-collect-support-log.md

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# Collect support logs in Microsoft Defender for Endpoint using live response
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- If you require additional logs related to Microsoft Defender Antivirus, then use `..\Tools\MDELiveAnalyzerAV.ps1`.
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- If you require [Microsoft Endpoint Data Loss Prevention](/purview/endpoint-dlp-learn-about) related logs, then use `..\Tools\MDELiveAnalyzerDLP.ps1`.
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- If you require network and [Windows Filter Platform](/windows-hardware/drivers/network/windows-filtering-platform-architecture-overview) related logs, then use `..\Tools\MDELiveAnalyzerNet.ps1`.
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defender-office-365/submissions-admin.md

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description: "Admins can learn how to use the Submissions page in the Microsoft Defender portal to submit messages, URLs, and email attachments to Microsoft for analysis. Reasons for submission include: legitimate messages that were blocked, suspicious messages that were allowed, suspected phishing email, spam, malware, and other potentially harmful messages."
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- ✅ <a href="https://learn.microsoft.com/defender-office-365/eop-about" target="_blank">Exchange Online Protection</a>
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- ✅ <a href="https://learn.microsoft.com/defender-office-365/mdo-about#defender-for-office-365-plan-1-vs-plan-2-cheat-sheet" target="_blank">Microsoft Defender for Office 365 Plan 1 and Plan 2</a>
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When **45 days after last used date** is selected, the last used date of the allow entry is updated when the malicious email message is encountered during mail flow. The allow entry is kept for 45 days after the filtering system determines that the email message is clean. For all other values, the allow entry exipres on the defined date (**1 day**, **7 days**, **30 days**, or the **Specific date**).
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- **Allow entry note (optional)**: Enter optional information about why you're allowing this item. For spoofed senders, any value you enter here isn't shown in the allow entry on the **Spoofed senders** tab on the **Tenant Allow/Block Lists** page.
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> - By default, allow entries for domains and email addresses are kept for 45 days after the filtering system determines that the entity is clean, and then the allow entry is removed. For all other values like 1 day, 7 days, 30 days, specific date the allow entry expire at the defined date. By default, allow entries for spoofed senders never expire.
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> - By default, allow entries for files are kept for 45 days after the filtering system determines that the entity is clean, and then the allow entry is removed. For all other values like 1 day, 7 days, 30 days, specific date the allow entry expire at the defined date.
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> - When the file is encountered again during mail flow, [Safe Attachments](safe-attachments-about.md) detonation or file reputation checks and all other file-based filters are overridden. If the filtering system determines that all other entities in the email message are clean, the message are delivered.
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