Merge pull request #4497 from MicrosoftDocs/master

Publish 01/04/2021, 3:30 PM

windows/security/threat-protection/TOC.md

@@ -302,6 +302,7 @@
 ##### [Troubleshoot installation issues](microsoft-defender-atp/linux-support-install.md)
 ##### [Troubleshoot cloud connectivity issues](microsoft-defender-atp/linux-support-connectivity.md)
 ##### [Troubleshoot performance issues](microsoft-defender-atp/linux-support-perf.md)
+##### [Troubleshoot missing events issues](microsoft-defender-atp/linux-support-events.md)
 
 
 #### [Privacy](microsoft-defender-atp/linux-privacy.md)

windows/security/threat-protection/microsoft-defender-atp/basic-permissions.md

@@ -37,17 +37,19 @@ You can use either of the following solutions:
 For granular control over permissions, [switch to role-based access control](rbac.md).
 
 ## Assign user access using Azure PowerShell
+
 You can assign users with one of the following levels of permissions:
 - Full access (Read and Write)
 - Read-only access
 
 ### Before you begin
+
 - Install Azure PowerShell. For more information, see, [How to install and configure Azure PowerShell](https://azure.microsoft.com/documentation/articles/powershell-install-configure/).<br>
 
     > [!NOTE]
     > You need to run the PowerShell cmdlets in an elevated command-line.
 
-- Connect to your Azure Active Directory. For more information, see, [Connect-MsolService](https://msdn.microsoft.com/library/dn194123.aspx).
+- Connect to your Azure Active Directory. For more information, see [Connect-MsolService](https://docs.microsoft.com/powershell/module/msonline/connect-msolservice?view=azureadps-1.0).
 
 **Full access** <br>
 Users with full access can log in, view all system information and resolve alerts, submit files for deep analysis, and download the onboarding package.
@@ -61,19 +63,20 @@ Assigning read-only access rights requires adding the users to the "Security Rea
 Use the following steps to assign security roles:
 
 - For **read and write** access, assign users to the security administrator role by using the following command:
-  ```text
+  ```PowerShell
   Add-MsolRoleMember -RoleName "Security Administrator" -RoleMemberEmailAddress "secadmin@Contoso.onmicrosoft.com"
   ```
 - For **read-only** access, assign users to the security reader role by using the following command:
-  ```text
+  ```PowerShell
   Add-MsolRoleMember -RoleName "Security Reader" -RoleMemberEmailAddress "reader@Contoso.onmicrosoft.com"
   ```
 
-For more information, see, [Add, or remove group memberships](https://technet.microsoft.com/library/321d532e-407d-4e29-a00a-8afbe23008dd#BKMK_ManageGroups).
+For more information, see [Add or remove group members using Azure Active Directory](https://docs.microsoft.com/azure/active-directory/fundamentals/active-directory-groups-members-azure-portal).
 
 ## Assign user access using the Azure portal
-For more information, see [Assign administrator and non-administrator roles to uses with Azure Active Directory](https://docs.microsoft.com/azure/active-directory/fundamentals/active-directory-users-assign-role-azure-portal).
 
+For more information, see [Assign administrator and non-administrator roles to users with Azure Active Directory](https://docs.microsoft.com/azure/active-directory/fundamentals/active-directory-users-assign-role-azure-portal).
 
 ## Related topic
+
 - [Manage portal access using RBAC](rbac.md)

windows/security/threat-protection/microsoft-defender-atp/get-ip-statistics.md

@@ -46,7 +46,7 @@ Permission type |	Permission	|	Permission display name
 Application |	Ip.Read.All |	'Read IP address profiles'
 Delegated (work or school account) | Ip.Read.All |	'Read IP address profiles'
 
->[!Note]
+>[!NOTE]
 > When obtaining a token using user credentials:
 >- The user needs to have at least the following role permission: 'View Data' (See [Create and manage roles](user-roles.md) for more information)
 
@@ -95,3 +95,13 @@ Content-type: application/json
     "orgLastSeen": "2017-08-29T13:32:59Z"
 }
 ```
+
+
+| Name | Description |
+| :--- | :---------- |
+| Org prevalence | the distinct count of devices that opened network connection to this IP. |
+| Org first seen | the first connection for this IP in the organization. |
+| Org last seen  | the last connection for this IP in the organization. |
+
+> [!NOTE]
+> This statistic information is based on data from the past 30 days. 

windows/security/threat-protection/microsoft-defender-atp/linux-support-connectivity.md

@@ -24,7 +24,6 @@ ms.topic: conceptual
 
 [!INCLUDE [Microsoft 365 Defender rebranding](../../includes/microsoft-defender.md)]
 
-
 **Applies to:**
 
 - [Microsoft Defender for Endpoint for Linux](microsoft-defender-atp-linux.md)
@@ -37,8 +36,29 @@ To test if Defender for Endpoint for Linux can communicate to the cloud with the
 mdatp connectivity test
 ```
 
+expected output:
+
+```output
+Testing connection with https://cdn.x.cp.wd.microsoft.com/ping ... [OK]
+Testing connection with https://eu-cdn.x.cp.wd.microsoft.com/ping ... [OK]
+Testing connection with https://wu-cdn.x.cp.wd.microsoft.com/ping ... [OK]
+Testing connection with https://x.cp.wd.microsoft.com/api/report ... [OK]
+Testing connection with https://winatp-gw-cus.microsoft.com/test ... [OK]
+Testing connection with https://winatp-gw-eus.microsoft.com/test ... [OK]
+Testing connection with https://winatp-gw-weu.microsoft.com/test ... [OK]
+Testing connection with https://winatp-gw-neu.microsoft.com/test ... [OK]
+Testing connection with https://winatp-gw-ukw.microsoft.com/test ... [OK]
+Testing connection with https://winatp-gw-uks.microsoft.com/test ... [OK]
+Testing connection with https://eu-v20.events.data.microsoft.com/ping ... [OK]
+Testing connection with https://us-v20.events.data.microsoft.com/ping ... [OK]
+Testing connection with https://uk-v20.events.data.microsoft.com/ping ... [OK]
+Testing connection with https://v20.events.data.microsoft.com/ping ... [OK]
+```
+
 If the connectivity test fails, check if the device has Internet access and if [any of the endpoints required by the product](microsoft-defender-atp-linux.md#network-connections) are blocked by a proxy or firewall.
 
+Failures with curl error 35 or 60, indicate certificate pinning rejection. Please check if the connection is under SSL or HTTPS inspection. If so, add Microsoft Defender for Endpoint to the allow list.
+
 ## Troubleshooting steps for environments without proxy or with transparent proxy
 
 To test that a connection is not blocked in an environment without a proxy or with a transparent proxy, run the following command in the terminal:

windows/security/threat-protection/microsoft-defender-atp/linux-support-events.md

@@ -0,0 +1,94 @@
+---
+title: Troubleshoot missing events or alerts issues for Microsoft Defender ATP for Linux
+description: Troubleshoot missing events or alerts issues in Microsoft Defender ATP for Linux.
+keywords: microsoft, defender, atp, linux, events
+search.product: eADQiWindows 10XVcnh
+search.appverid: met150
+ms.prod: w10
+ms.mktglfcycl: deploy
+ms.sitesec: library
+ms.pagetype: security
+ms.author: dansimp
+author: dansimp
+ms.localizationpriority: medium
+manager: dansimp
+audience: ITPro
+mms.collection: 
+- m365-security-compliance 
+- m365initiative-defender-endpoint 
+ms.topic: conceptual
+---
+
+# Troubleshoot missing events or alerts issues for Microsoft Defender for Endpoint for Linux
+
+[!INCLUDE [Microsoft 365 Defender rebranding](../../includes/microsoft-defender.md)]
+
+**Applies to:**
+
+- [Microsoft Defender for Endpoint for Linux](microsoft-defender-atp-linux.md)
+
+This article provides some general steps to mitigate missing events or alerts in the [security center](https://securitycenter.windows.com/) portal.
+
+Once Microsoft Defender for Endpoint has been installed properly on a device, a device page will be generated in the portal and _File_, _Process_, _Network_ and other events should appear in the timeline and advanced hunting pages.
+In case events are not appearing or some types of events are missing, that could indicate some problem.
+
+## Missing network and login events
+
+Microsoft Defender for Endpoint utilized `audit` framework from linux to track network and login activity.
+
+1. Make sure audit framework is working.
+
+    ```bash
+    service auditd status
+    ```
+
+    expected output:
+
+    ```output
+    ● auditd.service - Security Auditing Service
+    Loaded: loaded (/usr/lib/systemd/system/auditd.service; enabled; vendor preset: enabled)
+    Active: active (running) since Mon 2020-12-21 10:48:02 IST; 2 weeks 0 days ago
+        Docs: man:auditd(8)
+            https://github.com/linux-audit/audit-documentation
+    Process: 16689 ExecStartPost=/sbin/augenrules --load (code=exited, status=1/FAILURE)
+    Process: 16665 ExecStart=/sbin/auditd (code=exited, status=0/SUCCESS)
+    Main PID: 16666 (auditd)
+        Tasks: 25
+    CGroup: /system.slice/auditd.service
+            ├─16666 /sbin/auditd
+            ├─16668 /sbin/audispd
+            ├─16670 /usr/sbin/sedispatch
+            └─16671 /opt/microsoft/mdatp/sbin/mdatp_audisp_plugin -d
+    ```
+
+2. If auditd is stopped, please start it.
+
+    ```bash
+    service auditd start
+    ```
+
+**On SLES15** systems, SYSCALL auditing in `auditd` is disabled by default and can explain missing events.
+
+1. To validate that SYSCALL auditing is not disabeld, list the current audit rules:
+
+    ```bash
+    sudo auditctl -l
+    ```
+
+    if the following line is present, please remove it or edit it to enable Microsoft Defender for Endpoint to track specific SYSCALLs.
+
+    ```output
+    -a task, never
+    ```
+
+    audit rules are located at `/etc/audit/rules.d/audit.rules`.
+
+## Missing file events
+
+File events are collected with `fanotify` framework. In case some or all file events are missing please make sure fanotify is enabled on the device and that the file system is [supported](microsoft-defender-atp-linux.md#system-requirements).
+
+List the filesystems on the machine with:
+
+```bash
+df -Th
+```

windows/security/threat-protection/microsoft-defender-atp/linux-support-install.md

@@ -24,7 +24,6 @@ ms.topic: conceptual
 
 [!INCLUDE [Microsoft 365 Defender rebranding](../../includes/microsoft-defender.md)]
 
-
 **Applies to:**
 
 - [Microsoft Defender for Endpoint for Linux](microsoft-defender-atp-linux.md)
@@ -36,9 +35,11 @@ An error in installation may or may not result in a meaningful error message by
  ```bash
  sudo journalctl | grep 'microsoft-mdatp'  > installation.log
 ```
+
 ```bash
  grep 'postinstall end' installation.log
 ```
+
 ```Output
  microsoft-mdatp-installer[102243]: postinstall end [2020-03-26 07:04:43OURCE +0000] 102216
  ```
@@ -47,6 +48,20 @@ An output from the previous command with correct date and time of installation i
 
 Also check the [Client configuration](linux-install-manually.md#client-configuration) to verify the health of the product and detect the EICAR text file.
 
+## Make sure you have the correct package
+
+Please mind that the package you are installing is matching the host distribution and version.
+
+| package                       | distribution                             |
+|-------------------------------|------------------------------------------|
+| mdatp-rhel8.Linux.x86_64.rpm  | Oracle, RHEL and CentOS 8.x              |
+| mdatp-sles12.Linux.x86_64.rpm | SuSE Linux Enterprise Server 12.x        |
+| mdatp-sles15.Linux.x86_64.rpm | SuSE Linux Enterprise Server 15.x        |
+| mdatp.Linux.x86_64.rpm        | Oracle, RHEL and CentOS 7.x              |
+| mdatp.Linux.x86_64.deb        | Debian and Ubuntu 16.04, 18.04 and 20.04 |
+
+For [manual deployment](linux-install-manually.md), make sure the correct distro and version had been chosen.
+
 ## Installation failed
 
 Check if the mdatp service is running:
@@ -54,6 +69,7 @@ Check if the mdatp service is running:
 ```bash
 systemctl status mdatp
 ```
+
 ```Output
  ● mdatp.service - Microsoft Defender for Endpoint
    Loaded: loaded (/lib/systemd/system/mdatp.service; enabled; vendor preset: enabled)
@@ -69,26 +85,33 @@ systemctl status mdatp
 ## Steps to troubleshoot if mdatp service isn't running
 
 1. Check if "mdatp" user exists:
+
     ```bash
     id "mdatp"
     ```
+
     If there’s no output, run
+
     ```bash
     sudo useradd --system --no-create-home --user-group --shell /usr/sbin/nologin mdatp
     ```
 
 2. Try enabling and restarting the service using:
+
     ```bash
     sudo systemctl enable mdatp
     ```
+
     ```bash
     sudo systemctl restart mdatp
     ```
 
 3. If mdatp.service isn't found upon running the previous command, run:
+
     ```bash
     sudo cp /opt/microsoft/mdatp/conf/mdatp.service <systemd_path>
     ```
+
     where ```<systemd_path>``` is
     ```/lib/systemd/system``` for Ubuntu and Debian distributions and
     ```/usr/lib/systemd/system``` for Rhel, CentOS, Oracle and SLES.
@@ -100,16 +123,21 @@ Now try restarting the mdatp service using step 2. Revert the configuration chan
 5. If `/opt` directory is a symbolic link, create a bind mount for `/opt/microsoft`.
 
 6. Ensure that the daemon has executable permission.
+
     ```bash
     ls -l /opt/microsoft/mdatp/sbin/wdavdaemon
     ```
+
     ```Output
     -rwxr-xr-x 2 root root 15502160 Mar  3 04:47 /opt/microsoft/mdatp/sbin/wdavdaemon
     ```
+
     If the daemon doesn't have executable permissions, make it executable using:
+
     ```bash
     sudo chmod 0755 /opt/microsoft/mdatp/sbin/wdavdaemon
     ```
+
     and retry running step 2.
 
 7. Ensure that the file system containing wdavdaemon isn't mounted with "noexec".
@@ -117,24 +145,31 @@ Now try restarting the mdatp service using step 2. Revert the configuration chan
 ## If mdatp service is running, but EICAR text file detection doesn't work
 
 1. Check the file system type using:
+
     ```bash
     findmnt -T <path_of_EICAR_file>
     ```
+
     Currently supported file systems for on-access activity are listed [here](microsoft-defender-atp-linux.md#system-requirements). Any files outside these file systems won't be scanned.
 
 ## Command-line tool “mdatp” isn't working
 
 1. If running the command-line tool `mdatp` gives an error `command not found`, run the following command:
+
     ```bash
     sudo ln -sf /opt/microsoft/mdatp/sbin/wdavdaemonclient /usr/bin/mdatp
     ```
+
     and try again.
 
     If none of the above steps help, collect the diagnostic logs:
+
     ```bash
     sudo mdatp diagnostic create
     ```
+
     ```Output
     Diagnostic file created: <path to file>
     ```
+
     Path to a zip file that contains the logs will be displayed as an output. Reach out to our customer support with these logs.

windows/security/threat-protection/microsoft-defender-atp/linux-support-perf.md

@@ -23,7 +23,6 @@ ms.topic: conceptual
 
 [!INCLUDE [Microsoft 365 Defender rebranding](../../includes/microsoft-defender.md)]
 
-
 **Applies to:**
 
 - [Microsoft Defender for Endpoint for Linux](microsoft-defender-atp-linux.md)
@@ -34,6 +33,8 @@ Real-time protection (RTP) is a feature of Defender for Endpoint for Linux that
 
 Depending on the applications that you are running and your device characteristics, you may experience suboptimal performance when running Defender for Endpoint for Linux. In particular, applications or system processes that access many resources over a short timespan can lead to performance issues in Defender for Endpoint for Linux.
 
+Before starting, **please make sure that other security products are not currenly running on the device**. Multilpe security products may conflict and impact the host performance.
+
 The following steps can be used to troubleshoot and mitigate these issues:
 
 1. Disable real-time protection using one of the following methods and observe whether the performance improves. This approach helps narrow down whether Defender for Endpoint for Linux is contributing to the performance issues.
@@ -43,12 +44,15 @@ The following steps can be used to troubleshoot and mitigate these issues:
     ```bash
     mdatp config real-time-protection --value disabled
     ```
+
     ```Output
     Configuration property updated
     ```
 
     If your device is managed by your organization, real-time protection can be disabled by your administrator using the instructions in [Set preferences for Defender for Endpoint for Linux](linux-preferences.md).
 
+    If the performance problem persists while real-time protection is off, the origin of the problem could be the endpoint detection and response component. In this case please contact customer support for further instructions and mitigation.
+
 2. To find the applications that are triggering the most scans, you can use real-time statistics gathered by Defender for Endpoint for Linux.
 
     > [!NOTE]
@@ -71,6 +75,7 @@ The following steps can be used to troubleshoot and mitigate these issues:
     ```bash
     mdatp config real-time-protection --value enabled
     ```
+
     ```Output
     Configuration property updated
     ```
@@ -80,6 +85,7 @@ The following steps can be used to troubleshoot and mitigate these issues:
     ```bash
     mdatp diagnostic real-time-protection-statistics --output json > real_time_protection.json
     ```
+
     > [!NOTE]
     > Using ```--output json``` (note the double dash) ensures that the output format is ready for parsing.
 
@@ -90,6 +96,7 @@ The following steps can be used to troubleshoot and mitigate these issues:
     ```bash
     wget -c https://raw.githubusercontent.com/microsoft/mdatp-xplat/master/linux/diagnostic/high_cpu_parser.py
     ```
+
     The output of this command should be similar to the following:
 
     ```Output
@@ -102,10 +109,13 @@ The following steps can be used to troubleshoot and mitigate these issues:
 
     100%[===========================================>] 1,020    --.-K/s   in 0s
     ```
+
 4. Next, type the following commands:
+
     ```bash
     chmod +x high_cpu_parser.py
     ```
+
     ```bash
     cat real_time_protection.json | python high_cpu_parser.py  > real_time_protection.log
     ```
@@ -127,7 +137,7 @@ The following steps can be used to troubleshoot and mitigate these issues:
     4764 None 228
     125  CrashPlanService 164
     ```
-     
+
     To improve the performance of Defender for Endpoint for Linux, locate the one with the highest number under the `Total files scanned` row and add an exclusion for it. For more information, see [Configure and validate exclusions for Defender for Endpoint for Linux](linux-exclusions.md).
 
     >[!NOTE]
@@ -136,5 +146,3 @@ The following steps can be used to troubleshoot and mitigate these issues:
 5. Configure Microsoft Defender ATP for Linux with exclusions for the processes or disk locations that contribute to the performance issues and re-enable real-time protection.
 
     For more information, see [Configure and validate exclusions for Microsoft Defender ATP for Linux](linux-exclusions.md).
-
-

windows/security/threat-protection/microsoft-defender-atp/respond-file-alerts.md

@@ -46,12 +46,12 @@ You can also submit files for deep analysis, to run the file in a secure cloud s
 
 Some actions require certain permissions. The following table describes what action certain permissions can take on portable executable (PE) and non-PE files:
 
-Permission | PE files | Non-PE files
+| Permission             | PE files | Non-PE files |
-:---|:---|:---
+| :--------------------- | :------: | :----------: |
-View data | X | X
+| View data              |     X    |       X      |
-Alerts investigation | ☑ | X
+| Alerts investigation   | ☑ |       X      |
-Live response basic | X | X
+| Live response basic    |     X    |       X      |
-Live response advanced | ☑ |☑
+| Live response advanced | ☑ |   ☑   |
 
 For more information on roles, see [Create and manage roles for role-based access control](user-roles.md).
 
@@ -133,7 +133,7 @@ You can roll back and remove a file from quarantine if you’ve determined that
 >
 > Defender for Endpoint will restore all custom blocked files that were quarantined on this device in the last 30 days.
 
-> [!Important]
+> [!IMPORTANT]
 > A file that was quarantined as a potential network threat might not be recoverable. If a user attempts to restore the file after quarantine, that file might not be accessible. This can be due to the system no longer having network credentials to access the file. Typically, this is a result of a temporary log on to a system or shared folder and the access tokens expired.
 
 ## Add indicator to block or allow a file
@@ -215,7 +215,7 @@ The Deep analysis summary includes a list of observed *behaviors*, some of which
 
 Results of deep analysis are matched against threat intelligence and any matches will generate appropriate alerts.
 
-Use the deep analysis feature to investigate the details of any file, usually during an investigation of an alert or for any other reason where you suspect malicious behavior. This feature is available within the **Deep analysis** tab, on the file's profile page.
+Use the deep analysis feature to investigate the details of any file, usually during an investigation of an alert or for any other reason where you suspect malicious behavior. This feature is available within the **Deep analysis** tab, on the file's profile page.<br/>
 <br/>
 
 > [!VIDEO https://www.microsoft.com/en-us/videoplayer/embed/RE4aAYy?rel=0]
@@ -232,7 +232,7 @@ You can also manually submit a sample through the [Microsoft Security Center Por
 
 When the sample is collected, Defender for Endpoint runs the file in is a secure environment and creates a detailed report of observed behaviors and associated artifacts, such as files dropped on devices, communication to IPs, and registry modifications.
 
-**Submit files for deep analysis:**
+#### Submit files for deep analysis
 
 1. Select the file that you want to submit for deep analysis. You can select or search a file from any of the following views:
 
@@ -252,7 +252,7 @@ A progress bar is displayed and provides information on the different stages of
 > [!NOTE]
 > Depending on device availability, sample collection time can vary. There is a 3–hour timeout for sample collection. The collection will fail and the operation will abort if there is no online Windows 10 device reporting at that time. You can re–submit files for deep analysis to get fresh data on the file.
 
-**View deep analysis reports**
+#### View deep analysis reports
 
 View the deep analysis report that Defender for Endpoint provides to see the details of the deep analysis that was conducted on the file you submitted. This feature is available in the file view context.
 
@@ -268,7 +268,7 @@ The details provided can help you investigate if there are indications of a pote
 
     ![The deep analysis report shows detailed information across a number of categories](images/analysis-results-nothing.png)
 
-**Troubleshoot deep analysis**
+#### Troubleshoot deep analysis
 
 If you encounter a problem when trying to submit a file, try each of the following troubleshooting steps.