ET HUNTING DNS Lookup for 8+ hexadecimal only duckdns domain

Query · suricata

dns.query;
content:".duckdns.org"; fast_pattern;
pcre:"/^[a-f0-9]{8,}\.duckdns\.org$/";
Raw source ET HUNTING DNS Lookup for 8+ hexadecimal only duckdns domain · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert dns $HOME_NET any -> any any (
    msg:"ET HUNTING DNS Lookup for 8+ hexadecimal only duckdns domain";
    dns.query;
    content:".duckdns.org"; fast_pattern;
    pcre:"/^[a-f0-9]{8,}\.duckdns\.org$/";
    reference:url,raw.githubusercontent.com/MISP/misp-warninglists/main/lists/dynamic-dns/list.json;
    classtype:bad-unknown;
    sid:2033959; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_16;
)

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