ET MALWARE Trojan.BlackRev Botnet Monitor Request CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Trojan.BlackRev Botnet Monitor Request CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/monitor.php?resp=ID|3a|"; fast_pattern;
    content:"Target|3a|";
    content:"Message|3a|";
    pcre:"/\/monitor\.php\?resp=ID\x3a[A-Za-z]{15}/";
    http.user_agent;
    content:"Mozilla/4.0 (SEObot)"; depth:20;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,www.btpro.net/blog/2013/05/black-revolution-botnet-trojan/;
    classtype:command-and-control;
    sid:2017717; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2013_11_15, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)