ET MALWARE Godlua Backdoor Downloading Encrypted Lua

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Godlua Backdoor Downloading Encrypted Lua";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".png";
    http.user_agent;
    content:"Mozilla|2f|5.0|20 28|";
    pcre:"/^(?:i686|x86_64|arm|mipsel)\-(?:static-linux|w64|iamsatan)\-(?:mingw32|uclibc(?:gnueabi)?)/R";
    content:"|29 20|Chrome|2f|20"; within:11;
    http.referer;
    content:"https://www.google.com"; endswith; fast_pattern;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Referer|0d 0a 0d 0a|";
    reference:url,blog.netlab.360.com/an-analysis-of-godlua-backdoor-en/;
    classtype:trojan-activity;
    sid:2027677; rev:6;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Client_Endpoint, created_at 2019_07_03, deployment Perimeter, malware_family Godlua, performance_impact Moderate, confidence High, signature_severity Major, tag Backdoor, updated_at 2020_11_19;
)