ET MALWARE Win32/ViSystem CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/ViSystem CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php?hwid="; fast_pattern;
    content:"&pwd=";
    content:"&cc=";
    content:"&fz=";
    content:"&df=";
    content:"&wlt=";
    http.header_names;
    content:!"Referer";
    reference:md5,9b0aa282698db89034d254076dd03e26;
    classtype:command-and-control;
    sid:2029212; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_31, deployment Perimeter, malware_family ViSystem, confidence High, signature_severity Major, updated_at 2019_12_31;
)