ET INFO Cisco Umbrella (OpenDNS) DNS Over HTTPS Certificate Inbound
Sourceet/open
CreatedOctober 18, 2022
UpdatedOctober 18, 2022
Classificationmisc-activity
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Cisco Umbrella (OpenDNS) DNS Over HTTPS Certificate Inbound"; flow:established,to_client; tls.cert_subject; content:"CN=doh.familyshield.opendns.com"; bsize:31; fast_pattern; threshold:type both, count 1, seconds 600, track by_src; reference:url,github.com/curl/curl/wiki/DNS-over-HTTPS; classtype:misc-activity; sid:2039452; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_10_18, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_18, reviewed_at 2024_12_02;)
References
Metadata
attack targetClient_Endpoint
created at2022_10_18
deploymentPerimeter
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2022_10_18
reviewed at2024_12_02
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