Hi IT Pro,  

The following is step-by-step document for Defender for Endpoint Linux (MD ATP for Linux) deployment. 

Let’s start your MD for Endpoint Linux deployment! 

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Microsoft Defender for Endpoint Linux (MD ATP)support for Linux with kernel version 3.10.0-327 or later, including the following Linux flavours : 

• Red Hat Enterprise Linux 7.2 or higher 
• CentOS 7.2 or higher 
• Ubuntu 16.04 LTS or higher LTS 
• Debian 9 or higher
• SUSE Linux Enterprise Server 12 or higher
• Oracle Linux 7.2 or higher 

MD ATP provide real-time protection for the following file system types: 

btrfs	ecryptfs	ext2
ext3	ext4	fuse
fuseblk	jfs	nfs
overlay	ramfs	reiserfs
tmpfs	udf	vfat
xfs

Deployment MD for Endpoint prerequisite: 

• Administrative privileges on the device (in case of manual deployment) 
• The fanotify kernel option must be enabled,
  • For RedHat Enterprise Linux 7.x and CentOS 7.x systems, the kernel module is enabled by default.
  • For Ubuntu, SUSE, and Oracle Enterprise Limited, Fanotify is enabled by default.
• Disk space: 650 MB 
• No other fanotify-based security solutions running on same Linux Computer. 
• Network connections
  • Set firewall outbound connection rules to allow these URLs.

Service location	DNS record
Common URLs for all locations	x.cp.wd.microsoft.com cdn.x.cp.wd.microsoft.com eu-cdn.x.cp.wd.microsoft.com wu-cdn.x.cp.wd.microsoft.com officecdn-microsoft-com.akamaized.net crl.microsoft.com events.data.microsoft.com
European Union	europe.x.cp.wd.microsoft.com eu-v20.events.data.microsoft.com usseu1northprod.blob.core.windows.net  usseu1westprod.blob.core.windows.net
United Kingdom	unitedkingdom.x.cp.wd.microsoft.com uk-v20.events.data.microsoft.com ussuk1southprod.blob.core.windows.net  ussuk1westprod.blob.core.windows.net
United States	unitedstates.x.cp.wd.microsoft.com us-v20.events.data.microsoft.com ussus1eastprod.blob.core.windows.net  ussus1westprod.blob.core.windows.net

• If a proxy or firewall is blocking anonymous traffic, make sure that anonymous traffic is permitted in the previously listed URLs.
• For transparent proxies, no additional configuration is needed
• For static proxy, follow the steps in Manual Static Proxy Configuration.

DEPLOYMENT OPTIONS

MD for Endpoint deployment go through 4 steps as follow:

• Configure the Linux software repository (Linux download channel)
• Application installation
• Download the onboarding package
• Client configuration (Onboarding Linux Client)

MANUAL DEPLOYMENT  (using YUM Utility)

1. Install Yum Utility for package installing and uninstalling
2. If the Server is RHEL and newly build, you have to register it with Redhat first.
3. It may take more than 30 minutes for all the RHEL download and Linux update packages.

• Yum update && yum install yum-utils

• Microsoft Defender for Linux can be deployed from one of the following channels (denoted below as [channel]🙁 insiders-fast, insiders-slow, or prod. Each of these channels corresponds to a Linux software repository
• RHEL and variants (CentOS and Oracle Linux)

sudo yum-config-manager --add-repo=https://packages.microsoft.com/config/[distro]/[version]/[channel].repo

If you want to check current Linux distro and version, run the command: 

cat/etc/os-release

• Install the Microsoft GPG public key:

sudo rpm --import http://packages.microsoft.com/keys/microsoft.asc

• Download and make usable all the metadata for the currently enabled yum repositories:

yum makecache

• RHEL and variants (CentOS and Oracle Linux):

sudo yum install mdatp

Downloading the  Onboarding package from MD ATP Portal

Download the onboarding package from Microsoft Defender Security Center:

1. In Microsoft Defender Security Center, go to Settings > Device Management > Onboarding.
2. In the first drop-down menu, select Linux Server as the operating system. In the second drop-down menu, select Local Script (for up to 10 devices) as the deployment method.
3. Select Download onboarding package. Save the file as WindowsDefenderATPOnboardingPackage.zip.

Client Configuration (Onboarding Linux Client)

• Make sure Python3 is in system ‘s path 

sudo alternatives --set python /usr/bin/python

• Copy MicrosoftDefenderATPOnboardingLinuxServer.py to the target device
  • On the target device

python MicrosoftDefenderATPOnboardingLinuxServer.py

• Verify that the device is now associated with your organization 

mdatp health --field org_id

• Verify that the device is properly onboarded and reporting to the service

Monitoring new Linux Client on ATP Portal

• Check if Linux Machine is display in ATP Portal Dashboard

How to configure Microsoft Defender for Endpoint on Linux Server

Location of mdatp configuration file: /etc/opt/microsoft/mdatp/managed/mdatp_managed.json

• In enterprise environments, Microsoft Defender ATP for Linux can be managed through a configuration profile
• The configuration profile is a .json file that consists of entries identified by a key (which denotes the name of the preference), followed by a value.Values can be simple, such as a numerical value, or complex, such as a nested list of preferences.
• Typically, you would use a configuration management tool to push a file with the name mdatp_managed.json at the location /etc/opt/microsoft/mdatp/managed/.

mdatp_managed.json preference key and value

	KEY	VALUE
Enable / disable real-time protection	enableRealTimeProtection	true (default)/false
Enable / disable passive mode(In passive mode:• Real-time protection is turned off.• On-demand scanning is turned on.• Automatic threat remediation is turned off.• Security intelligence updates are turned on.• Status menu icon is hidden.	passiveMode	true/false (default)
Scan exclusions	exclusions	$typeexcludedPath excludedFileExtension excludedFileName
Path to excluded content	path	valid paths (string)
Enable/Disable Delivered Cloud Protection	enabled	true (default)/false

Recommended configuration profile

To get started, we recommend the following configuration profile for your enterprise to take advantage of all protection features that Microsoft Defender for Endpoint Linux provides.

The following configuration profile will:

• Enable real-time protection (RTP)
• Specify how the following threat types are handled:
  • Potentially unwanted applications (PUA) are blocked
  • Archive bombs (file with a high compression rate) are audited to the product logs
• Enable automatic security intelligence updates
• Enable cloud-delivered protection
• Enable automatic sample submission at safe level

More MD for Endpoint Preference Configuration  

https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/linux-pre…

Configuration profile deployment by Linux Management:

Once you’ve built the configuration profile for your enterprise, you can deploy it through the management tool that your enterprise is using. Microsoft Defender ATP for Linux reads the managed configuration from the /etc/opt/microsoft/mdatp/managed/mdatp_managed.json file.

Update Microsoft Defender for Endpoint on Linux server

Each version of Microsoft Defender ATP for Linux has an expiration date, after which it will no longer continue to protect your device.

To check the MD for Endpoint expiration date, run the following bash command: 

mdatp health --field product_expiration

To update Microsoft Defender for Endpoint on Linux manually, execute one of the following commands: 

RHEL and variants (CentOS and Oracle Linux) 

sudo yum update mdatp

SLES and variants 

sudo zypper update mdatp

Ubuntu and Debian systems 

sudo apt-get install --only-upgrade mdatp

TROUBLESHOOTING

Troubleshoot installation issues:

To verify if the installation succeeded, one can obtain installation.log and search the installation logs for “postinstall end” phrase,  using these commands:

sudo journalctl | grep 'microsoft-mdatp'  > installation.log

grep 'postinstall end' installation.log

Troubleshooting Connectivity: 

Run the connectivity test

mdatp connectivity test

Troubleshooting Performance:

To find the applications that are triggering the most scans, you can use real-time statistics gathered by Microsoft Defender for Endpoint on Linux.

mdatp diagnostic real_time_protection_statistics > stat.log

This feature is enabled by default on the Dogfood and InsisderFast channels. If you’re using a different update channel, this feature can be enabled from the command line:

mdatp config real-time-protection-statistics --value enabled

More Troubleshooting:

Installation

https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/linux-sup…

Performance

https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/linux-sup…

Network Connectivity

https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/linux-sup…

I hope the information is useful to you. Please provide feedback.

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