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Who rated this post

Antony_Chan
L2 Linker

‎04-05-2024 01:38 AM

Hello @JacobYonkman,

 

Before we dive into XQL query/investigation. It's better to understand how's the infrastructure being setup.

Questions:

  1. Is your Domain Controller work as a DNS server
  2. Did the NGFW enable DNS sinkhole?
  3. Do all of your endpoints install with Cortex XDR agent?

Apart from Question 3, the investigation needs to be carry out from NGFW.

Here's an article of DNSSinkhole that might help you identify the source that attempted to access a malicious website.

How DNS Sinkholing Works (paloaltonetworks.com)

AC
(1)
Who rated this post
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