ET MALWARE JavaScriptBackdoor HTTP GET CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE JavaScriptBackdoor HTTP GET CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/?action="; fast_pattern;
    content:"&guid=";
    content:"&version="; distance:0;
    pcre:"/&version=\d+$/";
    http.header;
    content:"WinHttp.WinHttpRequest.";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,154e76a480b22cf24ddac4d2d59c22fe;
    classtype:command-and-control;
    sid:2021132; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_05_21, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_10_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)