ET RETIRED Stellar Stealer Data Exfiltration Attempt M5

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Stellar Stealer Data Exfiltration Attempt M5";
    flow:established,to_server;
    content:"POST";
    http.uri;
    content:"/index.php"; endswith;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:!"|0d 0a|User-Agent|0d 0a|";
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|uploaded_file|22 3b 20|filename|3d 22|";
    pcre:"/[A-Za-z0-9]{8}-[A-Z]{10}/R";
    content:"|2e|png|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a|"; fast_pattern;
    reference:url,asec.ahnlab.com/ko/52564/;
    classtype:trojan-activity;
    sid:2045770; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_18, deployment Perimeter, former_category MALWARE, malware_family Stellar, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_01, reviewed_at 2024_10_01;
    target:src_ip;
)