alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY SSL/TLS Certificate Observed (Upaste)"; flow:established,to_client; tls.cert_subject; content:"CN=upaste.me"; classtype:misc-activity; sid:2031196; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_11_10, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_10;)