alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (FIN8 CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=git-api.com"; nocase; fast_pattern; classtype:domain-c2; sid:2033623; rev:3; metadata:attack_target Client_and_Server, created_at 2021_07_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_08;)