ET MALWARE Win32/Kelihos.F exe Download 2

Query · suricata

flow:to_server,established;
urilen:<13;
http.method;
content:"GET";
http.uri;
content:".exe"; fast_pattern; endswith;
pcre:"/^\/[^\x2f]+?\.exe$/i";
http.host;
content:".ru"; endswith;
http.header;
content:".ru|0d 0a|Cache-Control|3a 20|no-cache|0d 0a|"; distance:0;
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; startswith;
Raw source ET MALWARE Win32/Kelihos.F exe Download 2 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Kelihos.F exe Download 2";
    flow:to_server,established;
    urilen:<13;
    http.method;
    content:"GET";
    http.uri;
    content:".exe"; fast_pattern; endswith;
    pcre:"/^\/[^\x2f]+?\.exe$/i";
    http.host;
    content:".ru"; endswith;
    http.header;
    content:".ru|0d 0a|Cache-Control|3a 20|no-cache|0d 0a|"; distance:0;
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; startswith;
    reference:md5,1303188d039076998b170fffe48e4cc0;
    classtype:trojan-activity;
    sid:2017190; rev:8;
    metadata:created_at 2013_07_24, malware_family Win32_Kelihos_F, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_29;
)

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