Unusual Parent Process for cmd.exe

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Unusual Parent Process for cmd.exe

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Identifies a suspicious parent child process relationship with cmd.exe descending from an unusual process.

Rule type: eql

Rule indices:

winlogbeat-*
logs-endpoint.events.*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5m

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

Maximum alerts per execution: 100

References: None

Tags:

Elastic
Host
Windows
Threat Detection
Execution

Version: 7

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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process where event.type in ("start", "process_started") and
  process.name : "cmd.exe" and
  process.parent.name : ("lsass.exe",
                         "csrss.exe",
                         "epad.exe",
                         "regsvr32.exe",
                         "dllhost.exe",
                         "LogonUI.exe",
                         "wermgr.exe",
                         "spoolsv.exe",
                         "jucheck.exe",
                         "jusched.exe",
                         "ctfmon.exe",
                         "taskhostw.exe",
                         "GoogleUpdate.exe",
                         "sppsvc.exe",
                         "sihost.exe",
                         "slui.exe",
                         "SIHClient.exe",
                         "SearchIndexer.exe",
                         "SearchProtocolHost.exe",
                         "FlashPlayerUpdateService.exe",
                         "WerFault.exe",
                         "WUDFHost.exe",
                         "unsecapp.exe",
                         "wlanext.exe" )

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/

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