alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Phishing Training Domain (notifierservice .com) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".notifierservice.com"; endswith; fast_pattern; classtype:misc-activity; sid:2051986; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2024_04_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Phishing_Training, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_03, reviewed_at 2024_10_03;)