ET MALWARE UPDATE Protocol Trojan Communication detected on http ports 2

Query · suricata

flow:to_server,established;
http.method;
content:"POST"; nocase;
http.uri;
content:"/update?id=";
http.header;
content:"X-Status|3A|";
content:"X-Size|3A|";
content:"X-Sn|3A|"; fast_pattern;
Raw source ET MALWARE UPDATE Protocol Trojan Communication detected on http ports 2 · Suricata
Esc
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 UPDATE Protocol Trojan Communication detected on http ports 2";
    flow:to_server,established;
    http.method;
    content:"POST"; nocase;
    http.uri;
    content:"/update?id=";
    http.header;
    content:"X-Status|3A|";
    content:"X-Size|3A|";
    content:"X-Sn|3A|"; fast_pattern;
    classtype:trojan-activity;
    sid:2014232; rev:5;
    metadata:created_at 2012_02_16, signature_severity Major, updated_at 2020_09_13;
)

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