ET MALWARE Possible Windows executable sent when remote host claims to send HTML/CSS Content

Query · suricata

flow:established,to_client;
content:"|0d 0a 0d 0a|MZ";
byte_jump:4,58,relative,little;
content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
http.content_type;
content:"text/css"; depth:8; endswith; nocase;
Raw source ET MALWARE Possible Windows executable sent when remote host claims to send HTML/CSS Content · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Possible Windows executable sent when remote host claims to send HTML/CSS Content";
    flow:established,to_client;
    content:"|0d 0a 0d 0a|MZ";
    byte_jump:4,58,relative,little;
    content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
    http.content_type;
    content:"text/css"; depth:8; endswith; nocase;
    classtype:trojan-activity;
    sid:2009909; rev:13;
    metadata:created_at 2010_07_30, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_10;
)

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