alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Bedep SSL Cert"; flow:established,to_client; tls.cert_serial; content:"00:C9:80:9A:85:50:97:CC:97"; fast_pattern; tls.cert_subject; content:"O=Company Ltd"; content:"OU=office"; reference:url,malware-traffic-analysis.net/2014/11/02/index.html; reference:md5,11837229f834d296342b205433e9bc48; classtype:trojan-activity; sid:2019646; rev:4; metadata:attack_target Client_Endpoint, created_at 2014_11_05, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_23;)