ET MALWARE DarkHotel Initial Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE DarkHotel Initial Beacon";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?type=creation"; fast_pattern;
    content:"result="; distance:1;
    content:"&info="; distance:0;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,securelist.com/blog/research/71713/darkhotels-attacks-in-2015/;
    classtype:targeted-activity;
    sid:2021610; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2015_08_11, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_05_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)