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Corelight Bright Ideas Blog

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Introducing RDP Inferences

Corelight recently released a new package, focused on RDP inferences, as part of our Encrypted Traffic Collection. This package runs on Corelight Sensors and provides network traffic analysis (NTA) inferences on live RDP traffic.  Read more »

Beating alert fatigue with integrated data

More than 15 years after Gartner declared that “IDS is dead” because it was too noisy to be effectively managed, alert fatigue continues to be a central theme of life in modern SOCs, with a majority of SOCs still unable to process all the alerts... Read more »

Meet the Corelight CTF tournament winners

This summer, Corelight hosted a virtual CTF tournament where hundreds of players raced to solve security challenges using Zeek data in Splunk and Elastic. After the preliminary rounds,  we invited the top performers back for a champions round and... Read more »

Profiling Whonix

Introduction This week I read a story announcing that the latest edition of Whonix had been released. I had heard of Whonix, but had never tried it. I knew it was a Linux distribution that tried to make it as easy and safe as possible to anonymize... Read more »

Investigating the effects of TLS 1.3 on Corelight logs, part 2

Introduction Welcome to part 2 of my three-part series on TLS. In the previous article I briefly introduced TLS, and showed how Corelight would produce logs for a clear-text HTTP session. In this article I will perform the same transaction using TLS... Read more »

How to use Corelight and Zeek logs to mitigate RDS/RDP vulnerabilities

Introduction On May 14 Microsoft released patches for, and details about, a remote code execution vulnerability in Remote Desktop Services (RDS), the graphical interactive desktop offered with most Windows operating system platforms. This... Read more »

Zeek is much more than a data format

Last week, a candidate for a senior role at Corelight explained his motivation for joining the company this way: “the world is standardizing on Zeek.”   Read more »

Examining aspects of encrypted traffic through Zeek logs

In my last post I introduced the idea that analysis of encrypted HTTP traffic requires different analytical models. If you wish to preserve the encryption (and not inspect it via a middlebox), you have to abandon direct inspection of HTTP payloads... Read more »

The last BroCon. It’ll be Zeek in 2019!

I’m back in San Francisco after the last ever BroCon! Why the last BroCon? Because the Bro Leadership Team has announced a new name for the project. After two years of discussion, no shortage of suggestions, and a final shortlist going through legal... Read more »

There’s more to Bro than great network data

Corelight recently released our 1.15 software update which includes some fantastic new features, including our first group of curated Bro Packages which we’re calling the “Core Collection.”  In this blog post, I’ll tell you a bit more about how... Read more »

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