ET MALWARE Zbot downloader Installing Zeus

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Zbot downloader Installing Zeus";
    flow:established,to_server;
    http.uri;
    content:".exe"; fast_pattern;
    http.accept; bsize:3;
    content:"*/*";
    http.user_agent; bsize:51;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.0|3b 29|";
    http.header;
    content:"Cache-Control|3a 20|no-cache|0d 0a|";
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|Accept-Language|0d 0a|"; startswith;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; endswith;
    classtype:trojan-activity;
    sid:2018421; rev:7;
    metadata:created_at 2014_04_25, performance_impact Significant, signature_severity Major, updated_at 2024_04_08;
)