alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO TLS Handshake Failure"; flow:established,to_client; dsize:7; content:"|15|"; depth:1; content:"|00 02 02 28|"; distance:2; within:4; fast_pattern; classtype:bad-unknown; sid:2029340; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_01_30, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_01_30;)