ET MALWARE InvisibleFerret CnC Activity (POST) M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE InvisibleFerret CnC Activity (POST) M1";
    flow:established,to_server;
    urilen:<6;
    http.method;
    content:"POST";
    http.uri;
    content:"/key"; startswith;
    pcre:"/^s?$/R";
    http.user_agent;
    content:"python-requests";
    http.request_body;
    pcre:"/^(ts|timestamp)\x3d(?:[0-9]{13})/";
    content:"&type="; distance:0;
    content:"&hid="; distance:0; fast_pattern;
    content:"&ss="; distance:0;
    content:"&cc="; distance:0;
    classtype:command-and-control;
    sid:2060605; 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_05, deployment Perimeter, malware_family InvisibleFerret, confidence High, signature_severity Critical, tag c2, updated_at 2025_03_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)