alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Winlock/Torrentlocker SSL Cert"; flow:established,to_client; tls.cert_serial; content:"00:EB:96:25:E5:32:57:EE:34"; fast_pattern; tls.cert_subject; content:"C=XX"; content:"L=Default City"; reference:md5,77ebe2b014baf75e45c3009b0d42fa5d; reference:url,www.csis.dk/da/csis/news/4726/; classtype:trojan-activity; sid:2021868; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_09_30, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_23;)