Conhost Spawned By Suspicious Parent Processedit

Detects when the Console Window Host (conhost.exe) process is spawned by a suspicious parent process, which could be indicative of code injection.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-windows.*

Severity: high

Risk score: 73

Runs every: 5m

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

Maximum alerts per execution: 100



  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Execution

Version: 5

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guideedit

## Config

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.

Rule queryedit

process where event.type in ("start", "process_started") and : "conhost.exe" and : ("svchost.exe", "lsass.exe", "services.exe", "smss.exe", "winlogon.exe", "explorer.exe",
                         "dllhost.exe", "rundll32.exe", "regsvr32.exe", "userinit.exe", "wininit.exe", "spoolsv.exe",
                         "wermgr.exe", "csrss.exe", "ctfmon.exe")