ET MALWARE WS/JS Downloader Mar 07 2017 M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE WS/JS Downloader Mar 07 2017 M1";
    flow:established,to_server;
    http.uri;
    content:"/counter/"; fast_pattern;
    pcre:"/\/counter\/(?:\?[a-z]?\d{1,2}$|[^\x2f]*\d\.exe$|.*?[?=](?=[A-Za-z_-]{0,200}[0-9][A-Za-z_-]{0,200}[0-9])(?=[A-Z0-9_-]{0,200}[a-z][A-Z0-9_-]{0,200}[a-z])(?=[a-z0-9_-]{0,200}[A-Z][a-z0-9_-]{0,200}[A-Z])[A-Za-z0-9_-]{50,}(?:&|$))/";
    http.user_agent;
    content:"MSIE 7.0";
    http.header_names;
    content:!"Referer";
    content:!"Cookie";
    classtype:trojan-activity;
    sid:2024035; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_03_08, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_08_18;
)