ET MALWARE Common Upatre Header Structure 3

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Common Upatre Header Structure 3";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.header;
    content:!"Taitus";
    pcre:"/^Accept\x3a\x20text\/\*,\x20application\/\*\r\nUser-Agent\x3a\x20[^\r\n]+\r\n(?:Pragma|Cache-Control)\x3a\x20no-cache\r\nConnection\x3a Keep-Alive\r\nHost\x3a[^\r\n]+?\r\n(?:\r\n)?$/";
    http.user_agent;
    content:!"Mozilla"; depth:7;
    http.accept;
    content:"text/*,|20|application/*"; depth:21;
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|User-Agent|0d 0a|"; fast_pattern;
    content:"|0d 0a|Connection|0d 0a|Host|0d 0a 0d 0a|";
    classtype:trojan-activity;
    sid:2020295; rev:8;
    metadata:created_at 2015_01_23, performance_impact Significant, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_08;
)