ET MALWARE Sharik/Smoke CnC Beacon 9

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Sharik/Smoke CnC Beacon 9";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.uri;
    content:"/";
    http.user_agent;
    pcre:"/(?:MSIE|rv\x3a)/";
    http.request_body;
    pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
    http.connection;
    content:"keep-alive"; nocase;
    http.content_type;
    content:"application/x-www-form-urlencoded";
    http.content_len;
    content:"63"; fast_pattern;
    http.header_names;
    content:"|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|";
    reference:md5,7e604b9e059d054d58c91330d4d88c62;
    classtype:command-and-control;
    sid:2025178; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_12_29, deployment Perimeter, confidence High, signature_severity Major, tag Smoke_Loader, tag c2, updated_at 2020_08_24, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)