Covering The “Behind The Perimeter” Blind-Spot

Well, I cannot tell you what the next big breach will be, I CAN tell you that it will involve one critical system communicating to another system that it was/is not supposed to.  Whether that is ex filtration via secure ssh (SCP) to a server in Belarus or mounting a hidden drive share using a default service account that was never changed, behind the perimeter represents a rather large blind spot for many security endeavors.  In the video below, you are seeing a very quick and simple method for monitoring peer-to-peer communications using wire data with the ExtraHop Platform.  This is a somewhat painful process with logs due to the fact that logging build-up and tear-downs can impact the hardware being asked to do the logging and if you are licensed to pay by how much data you index, it can be expensive.  Grabbing Flow records directly off the wire positions your security practice to have this information readily available in real-time with no impact on the infrastructure as no system/switch is asked to run in debug mode.  Transactions are taken directly off the wire by the ExtraHop Discover Appliance and written directly to the Elastic ExtraHop Explorer Appliance to provide a large and holistic view of every transaction that occurs within your critical infrastructure.

This positions system-owners with the ability to (within minutes) to audit critical systems and account for transactions that are suspect.  In the video below, you will see how we can audit flow records by white listing expected communications and slowly leaving malicious communications no where to hide as you slowly reduce the surface area that you are trying to patrol.

I will follow this up with another post on how we can monitor Layer 7 metrics such as SQL Queries against critical databases.

Thanks for reading, please watch the video!

John Smith

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