ET MALWARE Havex RAT CnC Server Response HTML Tag

Query · suricata

flow:established,from_server;
http.header;
content:!"Keep-Alive|3a 20|"; nocase;
content:!"Conncection|3a 20|Keep-Alive"; nocase;
file_data;
content:"|3c|mega http|2d|equiv|3d|"; fast_pattern;
content:"|3c 2f|head|3e 3c|body|3e|"; within:200;
Raw source ET MALWARE Havex RAT CnC Server Response HTML Tag · Suricata
Esc
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 Havex RAT CnC Server Response HTML Tag";
    flow:established,from_server;
    http.header;
    content:!"Keep-Alive|3a 20|"; nocase;
    content:!"Conncection|3a 20|Keep-Alive"; nocase;
    file_data;
    content:"|3c|mega http|2d|equiv|3d|"; fast_pattern;
    content:"|3c 2f|head|3e 3c|body|3e|"; within:200;
    reference:md5,6557d6518c3f6bcb8b1b2de77165c962;
    classtype:command-and-control;
    sid:2018244; rev:5;
    metadata:created_at 2014_03_11, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_08, reviewed_at 2024_02_16;
)

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