ET MALWARE Emotet CnC Beacon

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php";
http.header;
pcre:"/^Host\x3a\x20[^\r\n]+\r\n(?:Cache-Control|Pragma)\x3a\x20no-cache\r\n(?:\r\n)?$/";
http.start;
content:".php|20|HTTP/1.1|0d 0a|Host|3a|"; fast_pattern;
http.header_names;
content:!"User-Agent|0d 0a|";
content:!"Accept";
content:!"Referer|0d 0a|";
http.host;
content:!".360.cn";
Raw source ET MALWARE Emotet 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 -> $EXTERNAL_NET 8080 (
    msg:"ET MALWARE Emotet CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php";
    http.header;
    pcre:"/^Host\x3a\x20[^\r\n]+\r\n(?:Cache-Control|Pragma)\x3a\x20no-cache\r\n(?:\r\n)?$/";
    http.start;
    content:".php|20|HTTP/1.1|0d 0a|Host|3a|"; fast_pattern;
    http.header_names;
    content:!"User-Agent|0d 0a|";
    content:!"Accept";
    content:!"Referer|0d 0a|";
    http.host;
    content:!".360.cn";
    reference:md5,518d189f8922280c81ab123604076dfd;
    classtype:command-and-control;
    sid:2035075; rev:7;
    metadata:attack_target Client_Endpoint, created_at 2015_06_11, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_04, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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