process where host.os.type == "windows" and event.type == "start" and process.executable : "C:\\*" and
(process.working_directory : "?:\\" and not process.working_directory: "C:\\") and
process.parent.name : "explorer.exe" and
process.name : ("rundll32.exe", "mshta.exe", "powershell.exe", "pwsh.exe", "cmd.exe", "regsvr32.exe",
"cscript.exe", "wscript.exe")
Install detection rules in Elastic Security
Detect Suspicious Execution from a Mounted Device 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).