event.category : "file" and host.os.type : "windows" and
event.type : ("creation" or "deletion" or "change") and process.name : "dns.exe" and
not file.extension : ("old" or "temp" or "bak" or "dns" or "arpa" or "log")
Install detection rules in Elastic Security
Detect Unusual File Operation by dns.exe in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).