ET MALWARE Trojan.Win32.Qadars Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Trojan.Win32.Qadars Checkin";
    flow:to_server,established;
    http.method;
    content:"POST"; nocase;
    http.request_body;
    content:"AAAA"; offset:10; depth:4; fast_pattern;
    content:"="; offset:7; depth:1;
    pcre:"/^[a-zA-Z]{7}=(?:[A-Za-z0-9+/]|%2[FB]){2}AAAA[a-z]A[^\s=]+=?=?$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Connection|0d 0a|";
    content:!"Accept";
    reference:md5,d611a633e8ceabdc9c2f5b0b9dd4f19e;
    reference:md5,a55b312d4e2006b5698e8f5ae8e5d735;
    reference:md5,3b4c2d3447bc49f057d76a92e7cae96b;
    reference:md5,08833cd7564f29f7f499a65a7be82d02;
    reference:url,www.lexsi-leblog.com/cert-en/qadars-new-banking-malware-with-fraudulent-mobile-application-component.html;
    classtype:command-and-control;
    sid:2023588; rev:6;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_10_10, deployment Perimeter, malware_family Qadars, performance_impact Low, signature_severity Major, updated_at 2020_08_03;
)