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;)