ET MALWARE W32/BlackEnergy Dirconf CnC Beacon

Query · suricata

flow:established,to_server;
http.uri;
content:"/dirconf/check.php"; fast_pattern;
http.header;
pcre:"/^Host\x3a\x20\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\x3a\d{1,5})?\r?$/mi";
Raw source ET MALWARE W32/BlackEnergy Dirconf CnC Beacon · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/BlackEnergy Dirconf CnC Beacon";
    flow:established,to_server;
    http.uri;
    content:"/dirconf/check.php"; fast_pattern;
    http.header;
    pcre:"/^Host\x3a\x20\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\x3a\d{1,5})?\r?$/mi";
    reference:url,www.f-secure.com/weblog/archives/00002721.html;
    classtype:command-and-control;
    sid:2019412; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2014_10_15, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_25, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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