Contents

TDR and Sophos

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.

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 Sophos software. It does not describe the procedure to set up your Threat Detection and Response account. For information about how to set up your TDR account, TDR deployment best practices, and how to enable TDR on a Firebox, see Threat Detection and Response Quick Start Guide.

Integration Summary

To avoid conflicts between the TDR Host Sensor and Sophos, add these exclusions:

  • Exclusions in TDR for Sophos (Windows):
    • C:\Program Files\Sophos\
    • C:\Program Files(x86)\Sophos\
    • C:\ProgramData\Sophos\
  • Exclusion in TDR for Sophos (Mac):
    • /Applications/Sophos Endpoint/
  • Exclusions in Sophos for TDR (Windows):
    • 64-bit Windows — C:\Program Files(x86)\WatchGuard\Threat Detection and Response\
    • 32-bit Windows — C:\Program Files\WatchGuard\Threat Detection and Response\
  • Exclusion in Sophos for TDR(Mac):
    • /usr/local/watchguard

If the Host Sensor and Sophos detect and respond to a threat at the same time, this can cause high utilization of system resources such as CPU, Memory, and Disk I/O.

Configuration Details

To complete this deployment, you must have:

  • An active Threat Detection and Response subscription with Host Sensor licenses
  • Sophos Endpoint:(Windows)
    • Core Agent 2.2.2
    • Endpoint Advanced 10.8.3
  • Sophos Intercept X:(Windows)
    • Core Agent 2.2.2
    • Sophos Intercept X 2.0.14
  • Sophos Endpoint (MAC)
    • Version:9.8.3

The TDR and Fireware versions tested for this deployment included:

  • TDR Host Sensor 5.6.3.8764
  • Firebox with Fireware v12.3 or higher

The Windows test environment for this deployment included:

  • Windows 7, 8.1, 10 Enterprise 64-bit Operating System
  • Memory (RAM) — 8 GB
  • Processor — 2 CPU Cores

The Mac test environment for this deployment included:

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

Configuration Exclusions in TDR

In your TDR account, add the 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 Sophos installed, Add exclusions for the Sophos file paths as TDR Exclusions in your TDR account.

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 appears.
  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.

Configuration Exclusions in Sophos

In Sophos, add the exclusions to identify the paths for files and locations to exclude. To prevent conflicts between the Host Sensor and Sophos, we recommend you add exclusions in Sophos for the paths used by the TDR Host Sensor.

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 Sophos for Windows:

  1. Log in to your Sophos central account.
  2. Click Global Settings.
  3. Select Global Exclusions under General.
  4. Click Add Exclusion.
  5. From EXCLUSION TYPE drop down list, select File or folder (Windows).
  6. Enter the path of TDR in the VALUE text box.
  7. From ACTIVE FOR drop down list, select Real-time and scheduled.
  8. Click Add.

To exclude TDR host sensor in Sophos for Mac:

  1. Log in to your Sophos central account.
  2. Click Global Settings.
  3. Select Global Exclusions under General.
  4. Click Add Exclusion.
  5. From EXCLUSION TYPE drop down list, select File or folder (Mac/Linux).
  6. Enter the path of TDR in the VALUE text box.
  7. From ACTIVE FOR drop down list, select Real-time and scheduled.
  8. Click Add.

It takes approximately three minutes for the TDR cloud to synchronize with the local client after install success.

For information about testing methodology, see Testing Methodology.

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