ET MALWARE Possible Tunna Proxy Closing Connection

Query · suricata

flow:established,from_server;
http.stat_code;
content:"200";
file.data;
content:"|5b|Server|5d 20|Closing|20|the|20|connection|20|"; startswith; fast_pattern;
Raw source ET MALWARE Possible Tunna Proxy Closing Connection · 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 -> any any (
    msg:"ET MALWARE Possible Tunna Proxy Closing Connection";
    flow:established,from_server;
    http.stat_code;
    content:"200";
    file.data;
    content:"|5b|Server|5d 20|Closing|20|the|20|connection|20|"; startswith; fast_pattern;
    reference:url,github.com/SECFORCE/Tunna;
    classtype:trojan-activity;
    sid:2028577; rev:2;
    metadata:created_at 2019_09_12, deployment Perimeter, malware_family Tunna, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_02;
)

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