ET MALWARE Win32/TrojanDownloader.Agent.FLZ CnC Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/TrojanDownloader.Agent.FLZ CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".aspx?ShopId=";
    pcre:"/^\/(?:GetProDownConfig|downservers|ShopIp)\.aspx\?ShopId=[0-9]+$/";
    http.header_names;
    content:"|0d 0a|HOST|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22; fast_pattern;
    reference:md5,8767e31c8052f43b6a74557d9579653e;
    classtype:command-and-control;
    sid:2037032; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_06_17, deployment Perimeter, malware_family Win32_TrojanDownloader_Agent_FLZ, confidence High, signature_severity Major, tag c2, updated_at 2022_06_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)