ET ATTACK_RESPONSE Unusual FTP Server Banner (freeFTPd)

Query · suricata

flow:established,from_server;
content:"220 ";
content:"--freeFTPd "; depth:40; nocase;
Raw source ET ATTACK_RESPONSE Unusual FTP Server Banner (freeFTPd) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any 21 -> $HOME_NET any (
    msg:"ET ATTACK_RESPONSE Unusual FTP Server Banner (freeFTPd)";
    flow:established,from_server;
    content:"220 ";
    content:"--freeFTPd "; depth:40; nocase;
    reference:url,www.freeftp.com;
    classtype:trojan-activity;
    sid:2003465; rev:5;
    metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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