Puntoloader yara sig

rule Punto_loader_bin
{
    meta:
        description = "Punto loader"
        author = "James_inthe_box"
        reference = "https://app.any.run/tasks/4de0d2c6-7f8d-4db7-baa7-50dd7e49952b"
        date = "2019/02"
        maltype = "Loader"

    strings:
        $mz = { 4d 5a }
        $string1 = "Main Returned."
        $string2 = "Content-Transfer-Encoding: base64"
        $string3 = "Content-Type: multipart/form-data; boundary=%s"
        $string4 = "Accept-Encoding: deflate,gzip"
        $string5 = "Software\\Yandex" wide
        $string6 = "Mozilla/5.0 (Windows NT 10.0; Win32; x86) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.9 Safari/537.36" wide
        $string7 = "klog.php" wide

    condition:
        ($mz at 0) and all of ($string*) and filesize < 800KB
}