ET MALWARE Zeus Bot Connectivity Check

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Zeus Bot Connectivity Check";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"GET";
    http.user_agent;
    content:"Mozilla/"; depth:8;
    http.host;
    content:!"login.live.com"; endswith;
    content:!"google.com"; endswith;
    content:!"www.bing.com"; endswith;
    content:!"yandex.ru"; endswith;
    content:!"linkedin.com"; endswith;
    http.connection;
    content:"close"; nocase;
    http.protocol;
    content:"HTTP/1.1";
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|Connection|0d 0a|User-Agent|0d 0a|";
    content:!"Referer";
    reference:url,www.secureworks.com/research/threats/zeus/?threat=zeus;
    reference:url,lists.emergingthreats.net/pipermail/emerging-sigs/2010-October/009807.html;
    classtype:trojan-activity;
    sid:2011588; rev:26;
    metadata:created_at 2010_10_02, performance_impact Moderate, signature_severity Major, updated_at 2024_04_09;
)