ET MALWARE Win.Trojan.Chewbacca connectivity check

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/ip/";
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|Synapse)"; fast_pattern;
http.header_names;
content:!"Accept";
content:!"Referer";
Raw source ET MALWARE Win.Trojan.Chewbacca connectivity check · 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 Win.Trojan.Chewbacca connectivity check";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/ip/";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|Synapse)"; fast_pattern;
    http.header_names;
    content:!"Accept";
    content:!"Referer";
    reference:md5,21f8b9d9a6fa3a0cd3a3f0644636bf09;
    reference:url,www.symantec.com/security_response/earthlink_writeup.jsp?docid=2013-121813-2446-99;
    classtype:trojan-activity;
    sid:2019162; rev:5;
    metadata:created_at 2014_08_18, signature_severity Major, updated_at 2020_05_06;
)

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