ET INFO Unusual number of DNS No Such Name Responses

7.0.35.0SID: 2003195Rev: 5Disabled1 views
Sourceet/open
Fileemerging-info.rules
CreatedJuly 30, 2010
UpdatedJuly 26, 2019
Classificationbad-unknown
alert udp any 53 -> ![$DNS_SERVERS,$SMTP_SERVERS] any (msg:"ET INFO Unusual number of DNS No Such Name Responses"; content:"|83|"; offset:3; depth:1; threshold:type both , track by_dst, count 50, seconds 300; classtype:bad-unknown; sid:2003195; rev:5; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)

Metadata

created at2010_07_30
confidenceHigh
signature severityInformational
updated at2019_07_26

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