alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE JavaScriptBackdoor SSL Cert"; flow:established,to_client; tls.cert_serial; content:"00:B7:2F:AE:E8:E2:55:B5:BF"; fast_pattern; tls.cert_subject; content:"O=My Company Ltd"; reference:md5,2a63b3a621d8e555734582d83b5e06a5; classtype:trojan-activity; sid:2021134; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_05_21, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_23;)