ET MALWARE Suspicious Fake Opera 10 User-Agent

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Opera/10|20|"; fast_pattern;
http.header_names;
content:!"Accept|0d 0a|";
Raw source ET MALWARE Suspicious Fake Opera 10 User-Agent · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspicious Fake Opera 10 User-Agent";
    flow:established,to_server;
    http.user_agent;
    content:"Opera/10|20|"; fast_pattern;
    http.header_names;
    content:!"Accept|0d 0a|";
    reference:url,dev.opera.com/articles/view/opera-ua-string-changes;
    reference:url,blog.avast.com/2013/05/03/regents-of-louisiana-spreading-sirefef-malware;
    classtype:trojan-activity;
    sid:2016823; rev:6;
    metadata:created_at 2013_05_04, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;
)

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