alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Observed SSL Cert (logodownload .org)"; flow:established,to_client; tls.cert_subject; content:"logodownload.org"; fast_pattern; pcre:"/CN=(?:[^\r\n]+?\.)?logodownload\.org(?!\.)/"; classtype:misc-activity; sid:2037270; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_07_05, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_05;)