Attachment: HTML smuggling with hex strings

type.inbound
and any(attachments,
        (
          .file_extension in~ ("html", "htm", "shtml", "dhtml")
          or .file_extension in~ $file_extensions_common_archives
          or .file_type == "html"
        )
        and any(file.explode(.),
                any(.scan.strings.strings,
                    // ["\x00\x00\x00\xAA..."]
                    regex.icontains(., '(\\x([a-zA-Z0-9]{2})){100}')
                )
        )
)