Security

Dns Queries

eamonnr
New Member

Is it possible to create a splunk alert anytime a domain name is queried for the 1st time within an organisation? E.G. An employee clicks on a link in a phishing email?

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martin_mueller
SplunkTrust
SplunkTrust

Sure, provided you have events in Splunk that tell you when a DNS query occurred for what host.

You'd build a summary index that stores the first occurrence for each queried host. You'd write a summarizing search that adds new hosts to that summary index frequently, and an alert that fires whenever new data is added to the summary index.

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eamonnr
New Member

Great, Thanks!

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