ET DNS DNS Lookup for localhost.DOMAIN.TLD

Query · suricata

content:"|01|"; offset:2; depth:1;
content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
content:"|09|localhost"; fast_pattern; nocase;
Raw source ET DNS DNS Lookup for localhost.DOMAIN.TLD · 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 udp ![$SMTP_SERVERS,$DNS_SERVERS] any -> $DNS_SERVERS 53 (
    msg:"ET DNS DNS Lookup for localhost.DOMAIN.TLD";
    content:"|01|"; offset:2; depth:1;
    content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
    content:"|09|localhost"; fast_pattern; nocase;
    classtype:bad-unknown;
    sid:2011802; rev:6;
    metadata:created_at 2010_10_13, confidence Medium, signature_severity Major, updated_at 2019_09_03;
)

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