ET HUNTING Possibly Suspicious Request for Putty.exe from Non-Standard Download Location

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:"/putty.exe"; nocase; endswith;
http.host;
content:!"the.earth.li";
Raw source ET HUNTING Possibly Suspicious Request for Putty.exe from Non-Standard Download Location · 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 HUNTING Possibly Suspicious Request for Putty.exe from Non-Standard Download Location";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:"/putty.exe"; nocase; endswith;
    http.host;
    content:!"the.earth.li";
    classtype:bad-unknown;
    sid:2026570; rev:3;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2018_11_02, deployment Perimeter, confidence Medium, signature_severity Minor, updated_at 2020_09_16;
)

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