ET WEB_SERVER WebShell Generic - ASP File Uploaded

Query · suricata

flow:established,to_server;
http.request_body;
content:"|0D 0A|";
content:"<%"; within:5; fast_pattern;
content:"%>"; distance:0;
pcre:"/<%[\x00-\x7f]{20}/";
Raw source ET WEB_SERVER WebShell Generic - ASP File Uploaded · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET WEB_SERVER WebShell Generic - ASP File Uploaded";
    flow:established,to_server;
    http.request_body;
    content:"|0D 0A|";
    content:"<%"; within:5; fast_pattern;
    content:"%>"; distance:0;
    pcre:"/<%[\x00-\x7f]{20}/";
    classtype:trojan-activity;
    sid:2017260; rev:12;
    metadata:created_at 2013_07_31, confidence Medium, signature_severity Major, updated_at 2020_04_24;
)

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