• Sublime Core Feed
Medium Severity

Attachment: Embedded VBScript in MHT file (unsolicited)

Labels

Description

MHT files can be used to run VBScript, which can run malicious code.

References

Sublime Security
Created Aug 17th, 2023 • Last updated Oct 4th, 2023
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and any(attachments,
        (.file_extension =~ "mht" or .file_extension in~ $file_extensions_common_archives)

        // ensure there's an mht file (if it's in an archive)
        and any(file.explode(.), .file_extension =~ "mht")
        and any(file.explode(.), any(.scan.html.scripts, .language == "VBScript"))
)
and (
  not profile.by_sender().solicited
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_false_positives
  )
)

Playground

Test against your own EMLs or sample data.

Share

Post about this on your socials.

Get Started. Today.

Managed or self-managed. No MX changes.

Get Started