ET EXPLOIT_KIT Observed LordEK HTTP POST Request

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/?"; depth:2;
pcre:"/^(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/Ri";
http.request_body;
content:"|7b 22|flash|22 3a|"; depth:9; fast_pattern;
content:"|22|ip_address|22 3a 22|"; distance:0;
content:"|22|country|22 3a 22|"; distance:0;
http.header_names;
content:"Referer";
Raw source ET EXPLOIT_KIT Observed LordEK HTTP POST Request · 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 -> $EXTERNAL_NET any (
    msg:"ET EXPLOIT_KIT Observed LordEK HTTP POST Request";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/?"; depth:2;
    pcre:"/^(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/Ri";
    http.request_body;
    content:"|7b 22|flash|22 3a|"; depth:9; fast_pattern;
    content:"|22|ip_address|22 3a 22|"; distance:0;
    content:"|22|country|22 3a 22|"; distance:0;
    http.header_names;
    content:"Referer";
    reference:url,www.malware-traffic-analysis.net/2019/08/01/index.html;
    classtype:exploit-kit;
    sid:2027788; rev:2;
    metadata:created_at 2019_08_02, deployment Perimeter, malware_family LordEK, performance_impact Low, signature_severity Major, tag Exploit_Kit, updated_at 2020_08_31;
)

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