alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Observed IP Lookup Domain (l2 .io in TLS SNI)"; flow:established,to_server; content:"l2.io"; fast_pattern:only; nocase; metadata: former_category POLICY; classtype:policy-violation; sid:2024833; rev:2; metadata:attack_target Client_Endpoint, deployment Perimeter, signature_severity Audit, created_at 2017_10_10, performance_impact Moderate, updated_at 2017_10_10;)

Added 2017-10-11 11:05:25 UTC

This rule can easily false positive on arbitrary TLS streams since the content string is so short.

-- BobAman - 2018-07-24


Topic revision: r2 - 2018-07-24 - BobAman
 
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