ET MALWARE Kimsuky CnC Exfil (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Kimsuky CnC Exfil (POST)";
    flow:established,to_server;
    urilen:4;
    http.method;
    content:"POST";
    http.uri;
    content:"/sp/";
    http.request_body;
    content:"form|2d|data|3b 20|name|3d 22|val|22|";
    content:"form|2d|data|3b 20|name|3d 22|nm|22|"; distance:0; fast_pattern;
    content:"filename|3d 22|C|3a 5c|Users|5c|"; distance:0;
    reference:url,aryaka.com/blog/kimsuky-apt-stealth-malware-social-engineering;
    classtype:command-and-control;
    sid:2063834; 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_06_24, deployment Perimeter, malware_family Kimsuky, confidence High, signature_severity Critical, tag c2, updated_at 2025_07_31, former_sid 2863016, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)