Attachment: CVE-2021-40444 - MSHTML Remote Code Execution Vulnerability

type.inbound
and any(attachments,
        (
          (
            .file_extension in~ $file_extensions_macros 
            or .file_extension =~ "rtf"
            or (
              .file_extension is null
              and .file_type == "unknown"
              and .content_type == "application/octet-stream"
              and .size < 100000000
            )
          )
          and any(file.oletools(.).relationships, regex.icontains(.target, ".*html:http.*"))
        )
        or (
          .file_extension in~ $file_extensions_common_archives
          and any(file.explode(.),
                  .flavors.mime == "text/xml"
                  and any(.scan.strings.strings, regex.icontains(., ".*oleObject.*mhtml.*http.*"))
          )
        )
)