ET MALWARE [PTsecurity] Trickbot Data Exfiltration

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE [PTsecurity] Trickbot Data Exfiltration";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/\.[A-F0-9]{32}\//";
    http.accept;
    content:"*/*";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b| MSIE 7.0|3b 20|Windows NT 6.1|3b|"; startswith;
    http.connection;
    content:"close"; startswith; nocase;
    http.host;
    pcre:"/^(?:(?:\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])/R";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:"|0d 0a|Accept|0d 0a|"; startswith;
    http.request_body;
    pcre:"/Content-Disposition\x3a\x20form-data\x3b\s*name=\x22(?:source|formdata|billinfo|cardinfo)\x22/m";
    content:"=|22|billinfo|22|"; fast_pattern;
    classtype:trojan-activity;
    sid:2026738; rev:6;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_12_19, deployment Perimeter, malware_family TrickBot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;
)