ET EXPLOIT FTPShell client Stack Buffer Overflow

Query · suricata

flow:established,from_server;
content:"220|20 22|";
isdataat:400,relative;
content:!"|00|"; within:400;
content:!"|22|"; within:400;
content:!"|0b|"; within:400;
content:!"|0a|"; within:400;
content:!"|0d|"; within:400;
content:"|ed 2e 45 22 20|"; fast_pattern; distance:400;
Raw source ET EXPLOIT FTPShell client Stack Buffer Overflow · 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 ftp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT FTPShell client Stack Buffer Overflow";
    flow:established,from_server;
    content:"220|20 22|";
    isdataat:400,relative;
    content:!"|00|"; within:400;
    content:!"|22|"; within:400;
    content:!"|0b|"; within:400;
    content:!"|0a|"; within:400;
    content:!"|0d|"; within:400;
    content:"|ed 2e 45 22 20|"; fast_pattern; distance:400;
    reference:url,2018-8733;
    reference:cve,2018-8734;
    reference:cve,2018-8735;
    reference:cve,2018-7573;
    reference:url,exploit-db.com/exploits/44968/;
    classtype:attempted-user;
    sid:2025779; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_07_03, cve CVE_2018_8734, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_07_26;
)

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