ET MALWARE W32/Dridex POST CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET 8080 (
    msg:"ET MALWARE W32/Dridex POST CnC Beacon";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 6.1|3b 20|Trident/7.0|3b 20|rv|3a|11.0) like Gecko"; fast_pattern;
    http.host;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\x3a\d{1,5})?$/";
    http.connection;
    content:"Close"; endswith;
    http.content_type;
    content:"octet/binary"; endswith;
    http.header_names;
    content:!"Referer";
    reference:md5,d37256439d5ab7f25561cc390d8aa1ea;
    classtype:command-and-control;
    sid:2019891; rev:6;
    metadata:attack_target Client_Endpoint, created_at 2014_12_08, deployment Perimeter, malware_family Dridex, signature_severity Major, tag c2, updated_at 2020_09_15, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)