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Suspicious Process Execution via Renamed PsExec Executable

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Suspicious Process Execution via Renamed PsExec Executable

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Identifies suspicious psexec activity which is executing from the psexec service that has been renamed, possibly to evade detection.

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: 101

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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process where event.type == "start" and
  process.pe.original_file_name : "psexesvc.exe" and not process.name : "PSEXESVC.exe"

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: System Services
- ID: T1569
- Reference URL: https://attack.mitre.org/techniques/T1569/
Sub-technique:
- Name: Service Execution
- ID: T1569.002
- Reference URL: https://attack.mitre.org/techniques/T1569/002/

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