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          Tracking down a glibc regression

          We’d just upgraded our glibc package from 2.32 to 2.33, when we noticed some peculiar behavior. Glibc 2.32 had a number of minor security issues and needed to be patched or upgraded. Instead of back-porting the patches to 2.32 we decided to upgrade... Read more »

          Detect C2 ‘RedXOR’ with state-based functionality

          Recently a very interesting Linux-based command-and-control (C2) malware was described by the research team at Intezer. As usual there is a set of simple network-based IOCs in the form of domains and IPs that organizations can search against their... Read more »

          Who’s your fridge talking to at night?

          Who’s your fridge talking to at night?

          I love origin stories – the tales of grand plans, unforeseen circumstances, and necessity that creates something new. These strange times have resulted in something new from Corelight, and I’d like to share how it came to be. Read more »

          Small, fast and easy. Pick any three.

          Small, fast and easy. Pick any three.

          Zeek has been the darling of security defenders looking to get deep visibility into network traffic. Over the last two decades, Zeek has become a household name – widely used by enterprise organizations, educational institutions and government... Read more »

          Mixed VLAN tags and BPF syntax

          This post contains a warning and a solution for anyone using BPF syntax when filtering traffic for network security monitoring.  Read more »

          Don’t delay – Corelight today!

          Introduction Recently I heard that a company interested in Corelight was considering delaying their evaluation because of questions about SIEM technology. They currently have two SIEMs and are evaluating a third, possibly to replace the first two.... 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 »

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