High Severity

Attachment: PowerShell content

Labels

Description

Recursively scans files and archives to detect PowerShell content.

While scripts are often blocked by mail filtering, alternative file formats and archived content may be employed to bypass such controls.

References

https://stackoverflow.com/questions/62604621/what-are-the-different-powershell-file-types

https://en.wikipedia.org/wiki/PowerShell#:~:text=named%20native%20commands.-,Filename%20extensions,-%5Bedit%5D

https://delivr.to/payloads?id=2d2a0629-7cbd-46f7-979a-e69d5dbd57c1

@ajpc500

Created Aug 17th, 2023 • Last updated Aug 5th, 2025

Feed Source

Sublime Core Feed

Source

GitHub

type.inbound
and any(attachments,
        (
          .file_extension in~ (
            // PowerShell related file extensions
            "ps1",
            "ps1xml",
            "psm1",
            "psd1",
            "pssc",
            "psrc",
            "cdxml",
            "ps2",
            "ps2xml",
            "psc2",
          )
          or .file_extension in~ $file_extensions_common_archives
        )
        and any(file.explode(.),
                .file_extension in~ (
                  "ps1",
                  "ps1xml",
                  "psm1",
                  "psd1",
                  "pssc",
                  "psrc",
                  "cdxml",
                  "ps2",
                  "ps2xml",
                  "psc2",
                )
        )
)

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