ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name=";
content:"|0d 0a|PK"; distance:0;
content:"Passwords.txt"; nocase; distance:0; fast_pattern;
Raw source ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=";
    content:"|0d 0a|PK"; distance:0;
    content:"Passwords.txt"; nocase; distance:0; fast_pattern;
    classtype:trojan-activity;
    sid:2029846; rev:2;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2020_04_09, deployment Perimeter, confidence High, signature_severity Minor, updated_at 2020_12_11;
)

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