alert tls any any -> any any (msg:"ET HUNTING Suspicious TLS SNI Request for Root"; flow:established,to_server; tls.sni; content:"Root"; depth:4; endswith; nocase; classtype:bad-unknown; sid:2029191; rev:2; metadata:attack_target Client_Endpoint, created_at 2019_12_23, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_26;)