ET MALWARE Win32/Hyteod CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Hyteod CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.header;
    content:"|5f 5e 5b 8b e5 5d|"; fast_pattern;
    http.user_agent;
    content:"Mozilla/5.0 (compatible|3b 20|MSIE 9.0|3b 20|Windows NT 6.1|3b 20|Trident/5.0)"; bsize:63;
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.header_names;
    content:!"Accept-";
    content:!"Connection|0d 0a|";
    content:!"Referer|0d 0a|";
    reference:md5,f2ad19a08063171b039accd24b0c27ca;
    classtype:command-and-control;
    sid:2020821; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_03_31, deployment Perimeter, malware_family Win32_Hyteod, confidence Medium, signature_severity Major, tag c2, updated_at 2020_09_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)