• Sublime Core Feed
High Severity

Attachment: LNK with embedded content

Description

Emotet has been observed to embed executable content within an LNK file to deliver and execute VBScript when launched.

Similar research has demonstrated how this concept may be applied to deliver and launch an embedded executable via PowerShell.

@ajpc500
Created Aug 17th, 2023 • Last updated Aug 21st, 2023
Source
type.inbound
and (
  any(attachments,
      .file_extension == "lnk"
      and any(file.explode(.),
              .file_extension =~ "lnk"
              and any(.scan.exiftool.fields, (.key == "TargetFileSize" and .value == "0"))
              and any(.scan.exiftool.fields,
                      (
                        .key == "CommandLineArguments"
                        and strings.ilike(.value, "*findstr*", "*sc $path*", "*Set-Content*")
                      )
              )
      )
  )
)
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