ET MALWARE Lumma Stealer Victim Fingerprinting Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Lumma Stealer Victim Fingerprinting Activity";
    flow:established,to_server;
    http.uri;
    content:"/api/set_agent?id="; startswith; fast_pattern;
    pcre:"/^[A-Z0-9]{32}/R";
    content:"&token="; within:8;
    content:"&description="; distance:0;
    content:"&agent="; distance:0;
    threshold:type limit,count 1,seconds 300,track by_src;
    reference:url,trendmicro.com/en_us/research/25/k/lumma-stealer-browser-fingerprinting.html;
    reference:url,malware-traffic-analysis.net/2026/01/01/index.html;
    classtype:command-and-control;
    sid:2066606; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_06, deployment Perimeter, deployment SSLDecrypt, malware_family Lumma_Stealer, confidence High, signature_severity Critical, tag c2, updated_at 2026_01_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)