ET WEB_SERVER Possible Perl Shell in HTTP POST

Query · suricata

flow:established,to_server;
http.method;
content:"POST"; nocase;
http.request_body;
content:"#!/bin/sh"; nocase; fast_pattern;
Raw source ET WEB_SERVER Possible Perl Shell in HTTP POST · 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 Possible Perl Shell in HTTP POST";
    flow:established,to_server;
    http.method;
    content:"POST"; nocase;
    http.request_body;
    content:"#!/bin/sh"; nocase; fast_pattern;
    reference:url,isc.sans.edu/diary.html?storyid=9478;
    classtype:web-application-attack;
    sid:2016642; rev:8;
    metadata:created_at 2013_03_22, confidence Medium, signature_severity Informational, updated_at 2020_09_18;
)

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