ET INFO HTTP Request to a *.top domain

Query · suricata

flow:established,to_server;
threshold:type limit, track by_src, count 1, seconds 30;
http.host;
content:".top"; fast_pattern;
pcre:"/^(\x3a\d{1,5})?$/R";
Raw source ET INFO HTTP Request to a *.top domain · 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 -> $EXTERNAL_NET any (
    msg:"ET INFO HTTP Request to a *.top domain";
    flow:established,to_server;
    threshold:type limit, track by_src, count 1, seconds 30;
    http.host;
    content:".top"; fast_pattern;
    pcre:"/^(\x3a\d{1,5})?$/R";
    reference:url,www.symantec.com/connect/blogs/shady-tld-research-gdn-and-our-2016-wrap;
    reference:url,www.spamhaus.org/statistics/tlds/;
    classtype:bad-unknown;
    sid:2023882; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_07, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2022_11_21;
)

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