ET MALWARE W32/Karagany.Downloader CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/Karagany.Downloader CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/check_value.php";
    http.user_agent;
    content:!"User-Agent|0d 0a|";
    http.request_body;
    content:"identifiant="; depth:12;
    reference:url,vrt-blog.snort.org/2014/05/continued-analysis-of-lightsout-exploit.html;
    classtype:command-and-control;
    sid:2018443; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2014_05_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_04_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)