ET MALWARE OtterCookie CnC Checkin Response

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE OtterCookie CnC Checkin Response";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"|22|list|22|";
    content:"|22|id|22|";
    content:"|22|OS|22|";
    content:"|22|platform|22|";
    content:"|22|release|22|";
    content:"|22|host|22|";
    content:"|22|userInfo|22 3a 7b 22|uid|22 3a|"; fast_pattern;
    pcre:"/^(?:\x2d)?\d{1,}\x2c\x22/R";
    reference:url,blackpointcyber.com/blog/malicious-node-package-deploys-ottercookie/;
    classtype:trojan-activity;
    sid:2065866; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_11_20, deployment Perimeter, malware_family OtterCookie, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_20, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system;
    target:src_ip;
)