alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE FAKE AOL SSL Cert APT1"; flow:established,to_client; tls.cert_serial; content:"7C:A2:74:D0:FB:C3:D1:54:B3:D1:A3:00:62:E3:7E:F6"; tls.cert_subject; content:"CN=mail.aol.com"; reference:url,www.mandiant.com/apt1; classtype:targeted-activity; sid:2016469; rev:4; metadata:attack_target Client_Endpoint, created_at 2013_02_22, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_03_21;)