Elastic medium stable eql
Suspicious MS Office Child Process
Identifies suspicious child processes of frequently targeted Microsoft Office applications (Word, PowerPoint, Excel). These child processes are often launched during exploitation of Office applications or from documents with malicious macros.
Detection Logic
process where host.os.type == "windows" and event.type == "start" and
process.parent.name : (
"eqnedt32.exe", "excel.exe", "fltldr.exe", "msaccess.exe",
"mspub.exe", "powerpnt.exe", "winword.exe", "outlook.exe"
) and
process.name : (
"Microsoft.Workflow.Compiler.exe", "arp.exe", "atbroker.exe", "bginfo.exe", "bitsadmin.exe", "cdb.exe",
"certutil.exe", "cmd.exe", "cmstp.exe", "control.exe", "cscript.exe", "csi.exe", "dnx.exe", "dsget.exe",
"dsquery.exe", "forfiles.exe", "fsi.exe", "ftp.exe", "gpresult.exe", "hostname.exe", "ieexec.exe", "iexpress.exe",
"installutil.exe", "ipconfig.exe", "mshta.exe", "msxsl.exe", "nbtstat.exe", "net.exe", "net1.exe", "netsh.exe",
"netstat.exe", "nltest.exe", "odbcconf.exe", "ping.exe", "powershell.exe", "pwsh.exe", "qprocess.exe",
"quser.exe", "qwinsta.exe", "rcsi.exe", "reg.exe", "regasm.exe", "regsvcs.exe", "regsvr32.exe", "sc.exe",
"schtasks.exe", "systeminfo.exe", "tasklist.exe", "tracert.exe", "whoami.exe", "wmic.exe", "wscript.exe",
"xwizard.exe", "explorer.exe", "rundll32.exe", "hh.exe", "msdt.exe"
) and
not (
process.parent.name : "outlook.exe" and
process.name : "rundll32.exe" and
process.args : "shell32.dll,Control_RunDLL" and
process.args : "srchadmin.dll"
) Field Validations
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