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Blog — Aug 06, 2021

TRU Positives: Weekly investigation summaries and recommendations from eSentire’s Threat Response Unit (TRU)

PetitPotam NTLM Relay Attack

3 minutes read
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Adversaries don’t work 9-5 and neither do we. At eSentire, our 24/7 SOCs are staffed with Elite Threat Hunters and Cyber Analysts who hunt, investigate, contain and respond to threats within minutes.

We have discovered some of the most dangerous threats and nation state attacks in our space – including the Kaseya MSP breach and the more_eggs malware.

Our Security Operations Centers are supported with Threat Intelligence, Tactical Threat Response and Advanced Threat Analytics driven by our Threat Response Unit – the TRU team.

In TRU Positives, eSentire’s Threat Response Unit (TRU) provides a summary of a recent threat investigation. We outline how we responded to the confirmed threat and what recommendations we have going forward.

Here’s the latest from our TRU Team…

What did we find?

How did we find it?

What did we do?

What can you learn from this TRU positive?

Recommendations from our Threat Response Unit (TRU) Team:

In response to PetitPotam, Microsoft has released several mitigations on NTLM relay attacks. We recommend implementing the following mitigations as soon as possible if your environment is potentially vulnerable to PetitPotam:

Additional measures such as EPA or SMB signing are recommended where NTLM authentication is in use.

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If you’re not currently engaged with a Managed Detection and Response provider, we highly recommend you partner with us for security services in order to disrupt threats before they impact your business.

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