ET MALWARE ReflectiveGnome Download Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE ReflectiveGnome Download Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".bin"; endswith;
    http.user_agent;
    content:"msie"; bsize:4; fast_pattern;
    http.host.raw;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:!"|0d 0a|Accept";
    classtype:command-and-control;
    sid:2034042; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_29, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_29;
)