ET MALWARE OtterCookie Payload Request

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE OtterCookie Payload Request";
    flow:established,to_server;
    urilen:51;
    http.method;
    content:"GET";
    http.uri;
    content:"/api/service/token/"; startswith; fast_pattern;
    pcre:"/^[0-9a-z]{32}$/R";
    http.user_agent;
    content:"axios"; startswith;
    reference:url,jp.security.ntt/tech_blog/en-contagious-interview-ottercookie;
    classtype:command-and-control;
    sid:2060644; 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 OtterCookie, confidence High, signature_severity Major, tag c2, tag Description_Generated_By_Proofpoint_Nexus, 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;
)