ET POLICY Observed IP Lookup Domain (l2 .io in TLS SNI)
Sourceet/open
CreatedOctober 10, 2017
UpdatedAugust 20, 2020
Classificationexternal-ip-check
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Observed IP Lookup Domain (l2 .io in TLS SNI)"; flow:established,to_server; tls.sni; content:"l2.io"; fast_pattern; nocase; classtype:external-ip-check; sid:2024833; rev:4; metadata:attack_target Client_Endpoint, created_at 2017_10_10, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Informational, updated_at 2020_08_20;)
Metadata
attack targetClient_Endpoint
created at2017_10_10
deploymentPerimeter
performance impactModerate
confidenceHigh
signature severityInformational
updated at2020_08_20
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