ET RETIRED Gamaredon Information Stealer Data Exfiltration Attempt

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Gamaredon Information Stealer Data Exfiltration Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\/[A-Z0-9]{12}$/i";
    http.user_agent;
    content:"Mozilla/1.0"; fast_pattern; startswith;
    http.content_type;
    content:"multipart/form-data|3b 20|boundary|3d 2d 2d 2d 2d|"; startswith;
    pcre:"/^[A-Z0-9]{12}$/Ri";
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|p|22|";
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|C|3a 5c|";
    reference:url,blog.talosintelligence.com/2022/09/gamaredon-apt-targets-ukrainian-agencies.html;
    reference:md5,b34760b85a6cfd9f31a05e76fa8589a6;
    classtype:trojan-activity;
    sid:2038907; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_09_20, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_18, reviewed_at 2024_09_18;
)