Initial Access (TA0001)(opens in a new tab or window)
endpoint(opens in a new tab or window)
windows(opens in a new tab or window)
process where host.os.type == "windows" and event.type == "start" and
(
process.name : ("cscript.exe", "wscript.exe", "powershell.exe", "rundll32.exe", "cmd.exe", "mshta.exe", "regsvr32.exe") or
?process.pe.original_file_name in ("cscript.exe", "wscript.exe", "PowerShell.EXE", "RUNDLL32.EXE", "Cmd.Exe", "MSHTA.EXE", "REGSVR32.EXE")
) and
/* Explorer started via DCOM */
process.parent.name : "explorer.exe" and process.parent.args : "-Embedding" and
not process.parent.args:
(
/* Noisy CLSID_SeparateSingleProcessExplorerHost Explorer COM Class IDs */
"/factory,{5BD95610-9434-43C2-886C-57852CC8A120}",
"/factory,{ceff45ee-c862-41de-aee2-a022c81eda92}"
)
Install detection rules in Elastic Security
Detect Suspicious Explorer Child Process 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).