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Remote Code Execute via Winrm.vbs

Detects an attempt to execute code or create service on remote host via winrm.vbs.

MITRE ATT&CK

defense-evasion

Detection Query

selection_img:
  - Image|endswith: \cscript.exe
  - OriginalFileName: cscript.exe
selection_cli:
  CommandLine|contains|all:
    - winrm
    - invoke Create wmicimv2/Win32_
    - -r:http
condition: all of selection*

Author

Julia Fomina, oscd.community

Created

2020-10-07

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1216

Raw Content

title: Remote Code Execute via Winrm.vbs
id: 9df0dd3a-1a5c-47e3-a2bc-30ed177646a0
status: test
description: Detects an attempt to execute code or create service on remote host via winrm.vbs.
references:
    - https://twitter.com/bohops/status/994405551751815170
    - https://redcanary.com/blog/lateral-movement-winrm-wmi/
    - https://lolbas-project.github.io/lolbas/Scripts/Winrm/
author: Julia Fomina, oscd.community
date: 2020-10-07
modified: 2023-03-03
tags:
    - attack.defense-evasion
    - attack.t1216
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        # Note: winrm.vbs can only be run by a process named cscript (see "IsCScriptEnv" function)
        - Image|endswith: '\cscript.exe'
        - OriginalFileName: 'cscript.exe'
    selection_cli:
        CommandLine|contains|all:
            - 'winrm'
            - 'invoke Create wmicimv2/Win32_'
            - '-r:http'
    condition: all of selection*
falsepositives:
    - Unknown
level: medium