ET MALWARE Possible Linux/Cdorked.A CnC

Query · suricata

flow:established,to_server;
http.uri;
content:"/favicon.iso?"; fast_pattern;
Raw source ET MALWARE Possible Linux/Cdorked.A CnC · 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 MALWARE Possible Linux/Cdorked.A CnC";
    flow:established,to_server;
    http.uri;
    content:"/favicon.iso?"; fast_pattern;
    reference:url,code.google.com/p/malware-lu/wiki/en_malware_cdorked_A;
    reference:url,welivesecurity.com/2013/04/26/linuxcdorked-new-apache-backdoor-in-the-wild-serves-blackhole/;
    classtype:command-and-control;
    sid:2016850; rev:4;
    metadata:created_at 2013_05_14, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;
)

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