alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Dridex Downloader SSL Certificate"; flow:established,to_client; tls.cert_serial; content:"00:92:14:63:AD:72:A8:8A:36"; fast_pattern; tls.cert_subject; content:"O=Casino Royale"; classtype:trojan-activity; sid:2021615; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_08_12, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_23;)