ET MALWARE VPNFilter htpx Module C2 Request

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE VPNFilter htpx Module C2 Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.user_agent;
    content:"curl53"; depth:6; fast_pattern; endswith;
    http.header_names;
    content:"Host|0d 0a|Accept|0d 0a|User-Agent|0d 0a 0d 0a|";
    reference:url,blog.talosintelligence.com/2018/09/vpnfilter-part-3.html;
    classtype:command-and-control;
    sid:2026429; rev:4;
    metadata:affected_product Linux, attack_target Networking_Equipment, created_at 2018_10_01, deployment Perimeter, malware_family VPNFilter, confidence High, signature_severity Major, updated_at 2020_09_16;
)