Deploy Microsoft Defender for Endpoint on Linux with Saltstack

Raksts
10/11/2024

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This article describes how to deploy Defender for Endpoint on Linux using Saltstack. A successful deployment requires the completion of all of the following tasks:

Download the onboarding package
Create Saltstack state files
Deployment
Reference

Important

This article contains information about third-party tools. This is provided to help complete integration scenarios, however, Microsoft does not provide troubleshooting support for third-party tools.
Contact the third-party vendor for support.

Prerequisites and system requirements

Before you get started, see the main Defender for Endpoint on Linux page for a description of prerequisites and system requirements for the current software version.

In addition, for Saltstack deployment, you need to be familiar with Saltstack administration, have Saltstack installed, configure the Master and Minions, and know how to apply states. Saltstack has many ways to complete the same task. These instructions assume availability of supported Saltstack modules, such as apt and unarchive to help deploy the package. Your organization might use a different workflow. Refer to the Saltstack documentation for details.

Here are a few important points:

Saltstack is installed on at least one computer (Saltstack calls the computer as the master).
The Saltstack master accepted the managed nodes (Saltstack calls the nodes as minions) connections.
The Saltstack minions are able to resolve communication to the Saltstack master (be default the minions try to communicate with a machine named 'salt').
Run the following ping test: sudo salt '*' test.ping
The Saltstack master has a file server location where the Microsoft Defender for Endpoint files can be distributed from (by default Saltstack uses the /srv/salt folder as the default distribution point)

Download the onboarding package

Warning

Repackaging the Defender for Endpoint installation package is not a supported scenario. Doing so can negatively impact the integrity of the product and lead to adverse results, including but not limited to triggering tampering alerts and updates failing to apply.

In Microsoft Defender portal, go to Settings > Endpoints > Device management > Onboarding.
In the first drop-down menu, select Linux Server as the operating system. In the second drop-down menu, select Your preferred Linux configuration management tool as the deployment method.
Select Download onboarding package. Save the file as WindowsDefenderATPOnboardingPackage.zip.

On the SaltStack Master, extract the contents of the archive to the SaltStack Server's folder (typically /srv/salt):

ls -l

total 8
-rw-r--r-- 1 test  staff  4984 Feb 18 11:22 WindowsDefenderATPOnboardingPackage.zip

unzip WindowsDefenderATPOnboardingPackage.zip -d /srv/salt/mde

Archive:  WindowsDefenderATPOnboardingPackage.zip
inflating: /srv/salt/mde/mdatp_onboard.json

Create Saltstack state files

In this step, you create a SaltState state file in your configuration repository (typically /srv/salt) that applies the necessary states to deploy and onboard Defender for Endpoint. Then, you add the Defender for Endpoint repository and key: install_mdatp.sls.

Note

Defender for Endpoint on Linux can be deployed from one of the following channels:

insiders-fast, denoted as [channel]
insiders-slow, denoted as [channel]
prod, denoted as [channel] using the version name (see Linux Software Repository for Microsoft Products)

Each channel corresponds to a Linux software repository.

The choice of the channel determines the type and frequency of updates that are offered to your device. Devices in insiders-fast are the first ones to receive updates and new features, followed later by insiders-slow, and lastly by prod.

In order to preview new features and provide early feedback, it's recommended that you configure some devices in your enterprise to use either insiders-fast or insiders-slow.

Warning

Switching the channel after the initial installation requires the product to be reinstalled. To switch the product channel: uninstall the existing package, re-configure your device to use the new channel, and follow the steps in this document to install the package from the new location.

Note your distribution and version and identify the closest entry for it under https://packages.microsoft.com/config/[distro]/.

In the following commands, replace [distro] and [version] with your information.

Note

In case of Oracle Linux and Amazon Linux 2, replace [distro] with "rhel". For Amazon Linux 2, replace [version] with "7". For Oracle utilize, replace [version] with the version of Oracle Linux.

cat /srv/salt/install_mdatp.sls

add_ms_repo:
  pkgrepo.managed:
    - humanname: Microsoft Defender Repository
    {% if grains['os_family'] == 'Debian' %}
    - name: deb [arch=amd64,armhf,arm64] https://packages.microsoft.com/[distro]/[version]/[channel] [codename] main
    - dist: [codename]
    - file: /etc/apt/sources.list.d/microsoft-[channel].list
    - key_url: https://packages.microsoft.com/keys/microsoft.asc
    - refresh: true
    {% elif grains['os_family'] == 'RedHat' %}
    - name: packages-microsoft-[channel]
    - file: microsoft-[channel]
    - baseurl: https://packages.microsoft.com/[distro]/[version]/[channel]/
    - gpgkey: https://packages.microsoft.com/keys/microsoft.asc
    - gpgcheck: true
    {% endif %}

Add the package installed state to install_mdatp.sls after the add_ms_repo state as previously defined.
```
install_mdatp_package:
  pkg.installed:
    - name: matp
    - required: add_ms_repo
```

Add the onboarding file deployment to install_mdatp.sls after the install_mdatp_package as previously defined.

copy_mde_onboarding_file:
  file.managed:
    - name: /etc/opt/microsoft/mdatp/mdatp_onboard.json
    - source: salt://mde/mdatp_onboard.json
    - required: install_mdatp_package

The completed install state file should look similar to this output:

add_ms_repo:
pkgrepo.managed:
- humanname: Microsoft Defender Repository
{% if grains['os_family'] == 'Debian' %}
- name: deb [arch=amd64,armhf,arm64] https://packages.microsoft.com/[distro]/[version]/prod [codename] main
- dist: [codename]
- file: /etc/apt/sources.list.d/microsoft-[channel].list
- key_url: https://packages.microsoft.com/keys/microsoft.asc
- refresh: true
{% elif grains['os_family'] == 'RedHat' %}
- name: packages-microsoft-[channel]
- file: microsoft-[channel]
- baseurl: https://packages.microsoft.com/[distro]/[version]/[channel]/
- gpgkey: https://packages.microsoft.com/keys/microsoft.asc
- gpgcheck: true
{% endif %}

install_mdatp_package:
pkg.installed:
- name: mdatp
- required: add_ms_repo

copy_mde_onboarding_file:
file.managed:
- name: /etc/opt/microsoft/mdatp/mdatp_onboard.json
- source: salt://mde/mdatp_onboard.json
- required: install_mdatp_package

Create a SaltState state file in your configuration repository (typically /srv/salt) that applies the necessary states to offboard and remove Defender for Endpoint. Before using the offboarding state file, you need to download the offboarding package from the Security portal and extract it in the same way you did the onboarding package. The downloaded offboarding package is only valid for a limited period of time.

Create an Uninstall state file uninstall_mdapt.sls and add the state to remove the mdatp_onboard.json file.

cat /srv/salt/uninstall_mdatp.sls

remove_mde_onboarding_file:
  file.absent:
    - name: /etc/opt/microsoft/mdatp/mdatp_onboard.json

Add the offboarding file deployment to the uninstall_mdatp.sls file after the remove_mde_onboarding_file state defined in the previous section.
```
 offboard_mde:
  file.managed:
    - name: /etc/opt/microsoft/mdatp/mdatp_offboard.json
    - source: salt://mde/mdatp_offboard.json
```

Add the removal of the MDATP package to the uninstall_mdatp.sls file after the offboard_mde state defined in the previous section.

remove_mde_packages:
  pkg.removed:
    - name: mdatp

The complete uninstall state file should look similar to the following output:

remove_mde_onboarding_file:
  file.absent:
    - name: /etc/opt/microsoft/mdatp/mdatp_onboard.json

offboard_mde:
  file.managed:
    - name: /etc/opt/microsoft/mdatp/mdatp_offboard.json
    - source: salt://mde/offboard/mdatp_offboard.json

remove_mde_packages:
   pkg.removed:
     - name: mdatp

Deployment

In this step, you apply the state to the minions. The following command applies the state to machines with the name that begins with mdetest.

Installation:
```
salt 'mdetest*' state.apply install_mdatp
```
Important

When the product starts for the first time, it downloads the latest antimalware definitions. Depending on your Internet connection, this can take up to a few minutes.

Validation/configuration:

salt 'mdetest*' cmd.run 'mdatp connectivity test'

salt 'mdetest*' cmd.run 'mdatp health'

Uninstallation:

salt 'mdetest*' state.apply uninstall_mdatp

Log installation issues

For more information on how to find the automatically generated log that's created by the installer when an error occurs, see Log installation issues.

Operating system upgrades

When upgrading your operating system to a new major version, you must first uninstall Defender for Endpoint on Linux, install the upgrade, and finally reconfigure Defender for Endpoint on Linux on your device.

Reference

SALT Project documentation

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