ET MALWARE Possible Kelihos.F EXE Download Common Structure 2

Query · suricata

flow:established,to_server;
http.uri;
content:"od"; offset:2; depth:2; nocase;
content:".exe"; nocase; endswith; fast_pattern;
pcre:"/^\/[mp]od[12]\/[^\/]+?\.exe$/i";
http.header_names;
content:"|0d 0a|Host|0d 0a|"; depth:8;
content:!"User-Agent";
Raw source ET MALWARE Possible Kelihos.F EXE Download Common Structure 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Possible Kelihos.F EXE Download Common Structure 2";
    flow:established,to_server;
    http.uri;
    content:"od"; offset:2; depth:2; nocase;
    content:".exe"; nocase; endswith; fast_pattern;
    pcre:"/^\/[mp]od[12]\/[^\/]+?\.exe$/i";
    http.header_names;
    content:"|0d 0a|Host|0d 0a|"; depth:8;
    content:!"User-Agent";
    reference:md5,9db28205c8dd40efcf7f61e155a96de5;
    classtype:trojan-activity;
    sid:2018395; rev:8;
    metadata:created_at 2014_04_16, performance_impact Significant, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_08;
)

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