ET EXPLOIT_KIT Suspicious VBS Encoding Observed in BottleEK

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT_KIT Suspicious VBS Encoding Observed in BottleEK";
    flow:established,to_client;
    http.content_type;
    content:"application/octet-stream";
    file.data;
    content:"Execute chr("; depth:12; fast_pattern;
    pcre:"/^-?\d+[/+]/R";
    content:"CLng(&H"; within:7;
    pcre:"/^[A-F0-9]+/R";
    content:"))&chr("; within:7;
    content:"CLng(&H"; distance:0;
    content:"))&chr("; distance:0;
    content:"CLng(&H"; distance:0;
    content:"))&chr("; distance:0;
    content:"CLng(&H"; distance:0;
    content:"))&chr("; distance:0;
    content:"CLng(&H"; distance:0;
    content:"))&chr("; distance:0;
    content:"CLng(&H"; distance:0;
    content:"))&chr("; distance:0;
    content:"CLng(&H"; distance:0;
    content:"))&chr("; distance:0;
    classtype:bad-unknown;
    sid:2029125; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_12, deployment Perimeter, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_24;
)