Gravwell Blog

Gravwell and Windows Event Logging

Dec 18, 2017 9:00:00 AM / by Kris Watts posted in Case study, EventLog, Windows, Security



We are going to dive into Windows and show how to get logs flowing into Gravwell in under 5 minutes with the WinEvent ingester. Using the Windows queries we will audit login behavior, RDP usage, some Windows Defender, and identify when Bob from accounting is copying sensitive financial data to external storage devices. Also, Taylor Swift is involved; don't panic, just stay with me.


This Gravwell post is all about the wild world of Windows Event logging and analytics. Both Unix and Windows provide standardized central logging facilities; however, the structure and format of the stored logs are dramatically different. Syslog and most other logging systems with roots in Unix approach logging as an unstructured stream: a log entry is a string of text, no more, no less (we are going to ignore journald and its binary madness). Windows, however, logs all events in fully-formed XML and the logging system is integrated into the operating system itself.  We should also note that logging in Windows is... less than ideal.  If you are coming from the Unix world, throw out all your assumptions; things are different here.

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OT Security Analytics - Finding the ground truth

Nov 16, 2017 11:22:40 AM / by Corey Thuen posted in Network Analytics, Case study, OT Analytics

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In this post, we take a look at analyzing Industrial Control System data to detect unauthorized manipulation of relays in a process.

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Discovering truth through lies on the internet - FCC comments analyzed

Oct 2, 2017 11:30:00 AM / by Corey Thuen posted in Case study, DevOps Analytics


For this post, the Gravwell analytics team ingested all 22 million+ comments submitted to the FCC over the net neutrality issue. Using Gravwell we were able to rapidly conduct a variety of analysis against the data to pull out some pretty interesting findings. We scraped the entirety of the FCC comments over the course of a night and ingested them into Gravwell afterward. It took about an hour of poking around to get a handle on what the data was and the following research was conducted over about a 12 hour period. So we went from zero knowledge to interesting insights in half a day. We’re kinda nerding out about it.

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Using Data Fusion to hunt infrastructure capacity issues

Sep 28, 2017 9:47:20 AM / by Corey Thuen posted in Data Fusion, Case study


 In this post we'll walk through a case study with a customer trying to identify an infrastructure capacity issue in which the system becomes unresponsive during a swell in page visits. We'll follow Alice and Bob (names changed, obviously) as they work through the issue.

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Hunting torrent machines with network analytics

Sep 12, 2017 12:11:37 PM / by Corey Thuen posted in Network Analytics, Case study


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