ET MALWARE Knockbot Proxy Response From Controller (empty command)

Query · suricata

flow:established,from_server;
content:"|0d 0a 0d 0a|command|7c|"; nocase;
Raw source ET MALWARE Knockbot Proxy Response From Controller (empty command) · 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 -> $HOME_NET any (
    msg:"ET MALWARE Knockbot Proxy Response From Controller (empty command)";
    flow:established,from_server;
    content:"|0d 0a 0d 0a|command|7c|"; nocase;
    reference:url,www.malwaredomainlist.com/mdl.php?search=knock.php;
    classtype:trojan-activity;
    sid:2010788; rev:6;
    metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_19;
)

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