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TA for Defender ATP hunting API

Splunk AppInspect Passed
Overview
Details
Onboard telemetry data via Microsoft Defender ATP hunting API for further correlation in Splunk (ES)

Add-on for Defender ATP Hunting Queries in Splunk

What does this add-on for Splunk do?

It allows you to create queries to onboard the relevant parts of Defender ATP telemetry into Splunk.

Why does this add-on exist?

  1. Defender ATP has a lot of valuable telemetry data that can be used for correlation in Splunk (Enterprise Security).
  2. Because Microsoft made their Defender ATP API generally available on 22 April 2019 https://twitter.com/MsftSecIntel/status/1120381773639143424
  3. There was previously no way to onboard Defender ATP telemetry data into Splunk.

Supported Splunk versions and platforms

This add-on works on Linux and Windows

Splunk version Linux Windows
6.3 Yes Yes
6.4 Yes Yes
6.5 Yes Yes
6.6 Yes Yes
7.0 Yes Yes
7.1 Yes Yes
7.2 Yes Yes
7.3 Yes Yes

How do I install this add-on

Single instance Splunk deployments

  1. In Splunk, click "Manage apps"
  2. Click "Browse more apps", search for TA-defender-atp-hunting
  3. Install the add-on

Distributed Splunk deployments

Instance type Supported Required Description
Search head Yes Yes Install this add-on on your search head(s) for proper field extraction
Indexer Yes No This add-on should be installed on a heavy forwarder that does the index time parsing and event breaking. There is no need to install this add-on on an indexer too.
Universal Forwarder No No This add-on is not supported on a Universal Forwarder because it requires Python
Heavy Forwarder Yes Yes Install this add-on on a heavy forwarder

How do I configure this add-on?

Find the Client ID and Azure AD Tenant ID first in portal.azure.com:

  1. In Azure portal go to Azure Active Directory -> App Registrations
  2. Go to WindowsDefenderATPThreatIntelAPI
  3. Click overview, and find:
  4. Application (client) Id
  5. Directory (tenant) Id
  6. Create a new Client Secret, see the "How do I configure the Azure side of things"

In Splunk, with all this information you can start to configure a new input in the add-on:

  1. Go to Configure, and create a new account. Paste the client id under username, and the client secret under password. Give it a name e.g. client_id_013d1963_d5a9_4329_bc1b_99d8e6db624d
  2. Go to inputs and Create a new input:

    • interval: recommended to 900 seconds or greater given the delays in Defender ATP telemetry
    • query: be sure to include a "where" statement that prevents duplicate events. Example query:

    ProcessCreationEvents | where EventTime > ago(1200s) and EventTime < ago(300s)

    Note that the API is rate limited, and also returns max 10000 events to make sure to include extra where clauses to stay below this limit.

How do I configure the Azure side of things?

  1. In Azure portal go to Azure Active Directory -> App Registrations
  2. Go to WindowsDefenderATPThreatIntelAPI
  3. Under API permissions add "AdvancedQuery.Read.All", and grant admin consent
  4. Under Certificates and Secrets add a new Client secret. The secret is only shown once, so make sure to copy to your favourite password manager.

Release Notes

Version 1.0.0
July 30, 2019

3
Installs
19
Downloads
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