Unusual Child Processes of RunDLL32edit
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-*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 30m
Searches indices from: now-60m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References: None
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Defense Evasion
Version: 100
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
sequence with maxspan=1h [process where event.type in ("start", "process_started") and (process.name : "rundll32.exe" or process.pe.original_file_name == "RUNDLL32.EXE") and process.args_count == 1 ] by process.entity_id [process where event.type in ("start", "process_started") and process.parent.name : "rundll32.exe" ] by process.parent.entity_id
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: System Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
-
Sub-technique:
- Name: Rundll32
- ID: T1218.011
- Reference URL: https://attack.mitre.org/techniques/T1218/011/