ET ATTACK_RESPONSE Unusual FTP Server Banner on High Port (WinFtpd)

Query · suricata

flow:established,from_server;
dsize:<18;
content:"220 WinFtpd"; depth:11; offset:0; nocase;
Raw source ET ATTACK_RESPONSE Unusual FTP Server Banner on High Port (WinFtpd) · 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 1024: -> $HOME_NET any (
    msg:"ET ATTACK_RESPONSE Unusual FTP Server Banner on High Port (WinFtpd)";
    flow:established,from_server;
    dsize:<18;
    content:"220 WinFtpd"; depth:11; offset:0; nocase;
    classtype:trojan-activity;
    sid:2007725; rev:6;
    metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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