Splunk Search

How do I search for synchronized activity of hosts?

digital_alchemy
Path Finder

So, I recently read an article discussing the difficulty of and various approaches to catching new or unknown botnet activity. This made me wonder if it would be possible to monitor for possible botnet activity with a Splunk search.

I've been trying to formulate a search in Splunk that would basically look for synchronized beaconing but I'm drawing a blank on how to structure the search.

I would basically want the search to look for multiple hosts contacting the same IP at the same time +/- a few seconds to account for slight time diff in logs.

Any ideas?

Tags (3)

martin_mueller
SplunkTrust
SplunkTrust

As an approach, you could go for timechart dc(host) by dest_ip, filtering out all known destinations. Those unknown dest_ips having a high number of hosts in a small time slice may be what you're looking for.

0 Karma
.conf21 CFS Extended through 5/20!

Don't miss your chance
to share your Splunk
wisdom in-person or
virtually at .conf21!

Call for Speakers has
been extended through
Thursday, 5/20!