ET MALWARE Unknown Webserver Backdoor

Query · suricata

flow:established,to_server;
http.user_agent;
content:"SEX/1"; nocase; fast_pattern; startswith;
Raw source ET MALWARE Unknown Webserver Backdoor · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Unknown Webserver Backdoor";
    flow:established,to_server;
    http.user_agent;
    content:"SEX/1"; nocase; fast_pattern; startswith;
    reference:url,blog.sucuri.net/2013/06/apache-php-injection-to-javascript-files.html;
    classtype:trojan-activity;
    sid:2017026; rev:4;
    metadata:created_at 2013_06_18, confidence Medium, signature_severity Major, updated_at 2020_09_18;
)

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