Suspicious Process Creation CallTraceedit

Identifies when a process is created and immediately accessed from an unknown memory code region and by the same parent process. This may indicate a code injection or hollowing attempt.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-windows.*

Severity: medium

Risk score: 43

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100


  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion

Version: 1

Added (Elastic Stack release): 8.0.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule queryedit

sequence by with maxspan=1m [process where event.code == "1"
and /* sysmon process creation */ :
("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe",
"eqnedt32.exe", "fltldr.exe", "mspub.exe",
"msaccess.exe", "powershell.exe", "pwsh.exe",
"cscript.exe", "wscript.exe", "rundll32.exe", "regsvr32.exe",
"mshta.exe", "wmic.exe", "cmstp.exe",
"msxsl.exe")] by process.parent.entity_id, process.entity_id
[process where event.code == "10" and /* Sysmon process access
event from unknown module */ winlog.event_data.CallTrace :
"*UNKNOWN*"] by process.entity_id, winlog.event_data.TargetProcessGUID

Threat mappingedit