alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed PAY2KEY Domain (pay2key .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".pay2key.com"; endswith; fast_pattern; reference:url,morphisec.com/blog/pay2key-resurgence-iranian-cyber-warfare/; classtype:misc-activity; sid:2063413; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_07_11, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_11;)