ET MALWARE Generic Trojan with /? and Indy Library User-Agent

Query · suricata

flow:established,to_server;
http.method;
content:"GET"; nocase;
http.uri;
content:"/?"; depth:2;
http.header;
content:"Indy Library)"; fast_pattern;
content:"Accept-Encoding|3a 20|identity|0D 0A|User-Agent|3a 20|Mozilla/3.0 (compatible|3b 20|Indy Library)";
content:!".ensignsoftware.com";
Raw source ET MALWARE Generic Trojan with /? and Indy Library User-Agent · 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 Generic Trojan with /? and Indy Library User-Agent";
    flow:established,to_server;
    http.method;
    content:"GET"; nocase;
    http.uri;
    content:"/?"; depth:2;
    http.header;
    content:"Indy Library)"; fast_pattern;
    content:"Accept-Encoding|3a 20|identity|0D 0A|User-Agent|3a 20|Mozilla/3.0 (compatible|3b 20|Indy Library)";
    content:!".ensignsoftware.com";
    classtype:trojan-activity;
    sid:2012312; rev:8;
    metadata:created_at 2011_02_14, confidence Medium, signature_severity Major, updated_at 2020_08_13;
)

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