IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
« Unusual Child Process of dns.exe Unusual City For an AWS Command »
Elastic Docs ›Elastic Security Solution [7.10] ›Detections and Alerts ›Prebuilt rule reference

Unusual Child Processes of RunDLL32

edit

Unusual Child Processes of RunDLL32

edit

Identifies child processes of unusual instances of RunDLL32 where the command line parameters were suspicious. Misuse of RunDLL32 could indicate malicious activity.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*
  • winlogbeat-*

Severity: high

Risk score: 21

Runs every: 5 minutes

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

Maximum alerts per execution: 100

Tags:

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

Version: 1

Added (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Rule query

edit
sequence with maxspan=1h [process where event.type in ("start",
"process_started") and /*
uncomment once in winlogbeat */ (process.name : "rundll32.exe" /*
or process.pe.original_file_name == "RUNDLL32.EXE" */ ) and
process.args_count < 2 ] by process.entity_id [process where
event.type in ("start", "process_started") and process.parent.name :
"rundll32.exe" ] by process.parent.entity_id

Threat mapping

edit

Framework: MITRE ATT&CKTM

« Unusual Child Process of dns.exe Unusual City For an AWS Command »