GPL ATTACK_RESPONSE command error

Query · suricata

flow:established;
content:"Bad command or filename"; nocase;
Raw source GPL ATTACK_RESPONSE command error · 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 $HTTP_SERVERS any -> $EXTERNAL_NET any (
    msg:"GPL ATTACK_RESPONSE command error";
    flow:established;
    content:"Bad command or filename"; nocase;
    classtype:bad-unknown;
    sid:2100495; rev:10;
    metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)

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