TDR and Microsoft Defender ATP for Mac

Deployment Overview

Threat Detection and Response is a collection of advanced malware defense tools that correlate threat indicators from Fireboxes and Host Sensors to enable real-time, automated response to stop known, unknown, and evasive threats.

As part of the TDR solution, you install TDR Host Sensors to provide endpoint protection. In some cases, the TDR Host Sensor might have conflicts with the antivirus software installed on your endpoints. To resolve this issue, you can configure exclusions in the antivirus software and in TDR.

This document includes information about the integration of a TDR Host Sensor with a host that runs Microsoft Defender ATP for Mac. It does not describe the procedure to set up Threat Detection and Response. For information about how to set up your TDR account, how to enable TDR on a Firebox, and how to install a Host Sensor, see Quick Start — Set Up Threat Detection and Response.

Integration Summary

To avoid conflicts between the TDR Host Sensor and Microsoft Defender ATP, add these exclusions:

  • Exclusions in TDR for Microsoft Defender ATP:
    • /Library/Application Support/Microsoft/Defender/
  • Exclusions in Microsoft Defender ATP for the TDR Host Sensor:
    • /Applications/WatchGuard/
    • /usr/local/watchguard/

Configuration Details

To complete this deployment, you must have:

  • An active Threat Detection and Response subscription, with Host Sensor licenses
  • Microsoft Defender ATP:
    • Antimalware Client Version: 100.62.57
    • Engine Version: 3.0
    • Antivirus Version: 78139
    • Antispyware Version: 78139

The TDR and Fireware versions tested for this deployment included:

  • TDR Host Sensor 5.8.0.8956
  • Firebox with Fireware 12.5 or higher

The Mac test environment for this deployment included:

  • macOS 10.13
  • Memory (RAM) — 8 GB
  • Processor — Intel Core i5

Configure Exclusions in TDR

In your TDR account, you can add exclusions to manually identify paths for files and processes that you do not want Host Sensors to monitor. Before you deploy a Host Sensor on computers that have Microsoft Defender ATP for Mac installed, add exclusions for the Microsoft Defender ATP for Mac file paths as TDR Exclusions in your TDR account. To add the exclusions to TDR, you can either use Predefined Exclusion Sets or add the exclusions manually.

Predefined Exclusion Sets

TDR has predefined AV exclusion sets for the most common third-party AV tools. This AV tool has a predefined exclusion set available. Predefined exclusion sets include all recommended exclusions for the AV tool. TDR updates these exclusion sets as needed. For information about predefined AV exclusion sets, see Configure TDR Exclusions.

You must also add the TDR exclusions to your AV software to avoid potential conflicts.

Manually Add AV Exclusions

If you do not want to exclude all the recommended paths in a predefined exclusion set, you can add exclusions manually.

In your TDR account, add the TDR exclusions for the paths shown in the Integration Summary.

Unless otherwise noted, configure each TDR exclusion with these options, which are selected by default:

  • Also exclude subfolders
  • Entities to exclude: Files and Processes

To add an exclusion in TDR:

  1. Log in to your TDR account or managed account as a user with Operator privileges.
  2. Select Configuration > Exclusion.
  3. Click Add Exclusion.
    The Add Exclusion dialog box opens.
  4. In the Path text box, type the path to exclude. Folders specified in an exclusion must end with a backslash.
  5. To apply the exception to all hosts, in the Hosts / Groups text box, specify the group All Hosts.
  6. Click Save & Close.

Repeat these steps to add each exclusion.

Configure Exclusions in Microsoft Defender ATP for Mac

To exclude directories used by the TDR Host Sensor, add the exclusions for the paths listed in the Integration Summary.

To add an exclusion in Microsoft Defender ATP for Mac:

  1. Open Microsoft Defender ATP in client.
  2. In the Microsoft Defender ATP navigation bar at the top left, click Actions > Exclusions.
  3. Select the TDR path to exclude.
  4. Click Done.

For information about the integration testing methodology, see TDR Testing Methodology.