ET MALWARE BeaverTail CnC Activity (POST) M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE BeaverTail CnC Activity (POST) M2";
    flow:established,to_server;
    urilen:<9;
    http.method;
    content:"POST";
    http.uri;
    content:"/upload"; startswith;
    pcre:"/^s?$/R";
    http.content_type;
    content:"multipart/form-data";
    http.request_body;
    content:"form|2d|data|3b 20|name|3d 22|timestamp|22 0d 0a 0d 0a|"; fast_pattern;
    pcre:"/^[0-9]{13}[\r\n]/R";
    content:"form|2d|data|3b 20|name|3d 22|type|22|"; distance:0;
    content:"form|2d|data|3b 20|name|3d 22|hid|22|"; distance:0;
    reference:md5,97f393aa0083ea0866b5db95f78f3f07;
    classtype:command-and-control;
    sid:2060573; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_03_04, deployment Perimeter, confidence High, signature_severity Critical, tag c2, updated_at 2025_03_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)