ET HUNTING Download Request Containing Suspicious Filename - Crypted

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:"crypted.exe"; nocase; fast_pattern; endswith;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET HUNTING Download Request Containing Suspicious Filename - Crypted · 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 Download Request Containing Suspicious Filename - Crypted";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:"crypted.exe"; nocase; fast_pattern; endswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,ff823130efcdf8ab267cad92eb5b90d7;
    reference:md5,e953e6b3be506c5b8ca80fbcd79c065e;
    reference:md5,1e2fa2e401cd2295a03ba8d8d3d3698b;
    classtype:trojan-activity;
    sid:2022491; rev:3;
    metadata:created_at 2016_02_04, confidence Medium, signature_severity Major, updated_at 2020_06_23;
)

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