ET MALWARE Win32/Trickbot Data Exfiltration M3

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Trickbot Data Exfiltration M3";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.content_type;
    content:"multipart/form-data|3b 20|boundary=---------"; startswith; bsize:55;
    pcre:"/^[A-Z]{16}$/R";
    http.request_body;
    content:"|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|data|22 0d 0a 0d 0a|";
    content:"|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|source|22 0d 0a 0d 0a|"; distance:0;
    content:"|20|cookies|0d 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d|"; distance:0; fast_pattern;
    reference:url,www.malware-traffic-analysis.net/2021/09/01/index.html;
    classtype:command-and-control;
    sid:2035357; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_01, deployment Perimeter, malware_family TrickBot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_01;
)