ET MALWARE Linux/Denonia DNS Request Over HTTPS (denonia .xyz) M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Linux/Denonia DNS Request Over HTTPS (denonia .xyz) M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/dns-query?name=gw.denonia.xyz&type=A"; bsize:37; endswith; fast_pattern;
    http.host;
    content:"cloudflare-dns.com";
    http.user_agent;
    content:"GoKit XHTTP Client"; startswith;
    http.accept;
    content:"application/dns-json";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:"|0d 0a|X-Http-Gokit-Requestid|0d 0a|";
    reference:url,cadosecurity.com/cado-discovers-denonia-the-first-malware-specifically-targeting-lambda;
    classtype:trojan-activity;
    sid:2035886; rev:2;
    metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2022_04_11, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_11, reviewed_at 2024_10_08;
)