Remote Code Execute via Winrm.vbs

calendar Mar 5, 2023 · attack.defense_evasion attack.t1216  ·
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Detects an attempt to execute code or create service on remote host via winrm.vbs.

Sigma rule (View on GitHub)

 1title: Remote Code Execute via Winrm.vbs
 2id: 9df0dd3a-1a5c-47e3-a2bc-30ed177646a0
 3status: test
 4description: Detects an attempt to execute code or create service on remote host via winrm.vbs.
 5references:
 6    - https://twitter.com/bohops/status/994405551751815170
 7    - https://redcanary.com/blog/lateral-movement-winrm-wmi/
 8    - https://lolbas-project.github.io/lolbas/Scripts/Winrm/
 9author: Julia Fomina, oscd.community
10date: 2020/10/07
11modified: 2023/03/03
12tags:
13    - attack.defense_evasion
14    - attack.t1216
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection_img:
20        # Note: winrm.vbs can only be run by a process named cscript (see "IsCScriptEnv" function)
21        - Image|endswith: '\cscript.exe'
22        - OriginalFileName: 'cscript.exe'
23    selection_cli:
24        CommandLine|contains|all:
25            - 'winrm'
26            - 'invoke Create wmicimv2/Win32_'
27            - '-r:http'
28    condition: all of selection*
29falsepositives:
30    - Unknown
31level: medium

References

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  • Lateral Movement Using WinRM and WMI

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  • Winrm | LOLBAS

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