alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (Darkme CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=zot4slot.com"; bsize:15; fast_pattern; reference:url,blog.nsfocus.net/darkcasino-apt-evilnum; classtype:domain-c2; sid:2036832; rev:2; metadata:attack_target Client_and_Server, created_at 2022_06_03, deployment Perimeter, malware_family Darkme, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_09_16, reviewed_at 2024_09_16;)