ET EXPLOIT_KIT Possible Astrum EK URI Struct

Query · suricata

flow:established,to_server;
urilen:60<>100;
http.request_line;
content:"|2e 20|HTTP/1."; fast_pattern;
http.uri;
pcre:"/^\/(?=[A-Za-z_-]*?\d)(?=[a-z0-9_-]*?[A-Z])(?:[A-Za-z0-9_-]{4}){15,}(?:[[A-Za-z0-9_-]{2}\x2e?\x2e|[A-Za-z0-9_-]{3}\x2e)$/";
Raw source ET EXPLOIT_KIT Possible Astrum EK URI Struct · 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 -> $EXTERNAL_NET any (
    msg:"ET EXPLOIT_KIT Possible Astrum EK URI Struct";
    flow:established,to_server;
    urilen:60<>100;
    http.request_line;
    content:"|2e 20|HTTP/1."; fast_pattern;
    http.uri;
    pcre:"/^\/(?=[A-Za-z_-]*?\d)(?=[a-z0-9_-]*?[A-Z])(?:[A-Za-z0-9_-]{4}){15,}(?:[[A-Za-z0-9_-]{2}\x2e?\x2e|[A-Za-z0-9_-]{3}\x2e)$/";
    classtype:exploit-kit;
    sid:2019176; rev:5;
    metadata:created_at 2014_09_16, confidence Medium, signature_severity Major, updated_at 2020_12_10;
)

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