ET MALWARE Win32/DeerStealer CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/DeerStealer CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^.+\x3f[a-zA-Z0-9]{8,20}\x3d[a-zA-Z0-9+\x2f=]{30,200}$/";
    http.content_len;
    byte_test:0,=,96,0,string,dec;
    http.header_names; bsize:58;
    content:"|0d 0a|Connection|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Content-Length|0d 0a|Host|0d 0a 0d 0a|";
    http.request_body;
    content:"|a0 a0 a0 ff ff d9 24|"; fast_pattern;
    pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}/R";
    reference:md5,6574d8e01ed5e76fbe7ede634f728c92;
    reference:md5,fa79b4a698424f36518f80a50c485561;
    reference:md5,db680e1ecbfca3baf196704c572f1296;
    classtype:trojan-activity;
    sid:2056550; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_10_08, deployment Perimeter, deployment SSLDecrypt, malware_family DeerStealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_08;
    target:src_ip;
)