alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Likely Dridex SSL Cert"; flow:established,to_client; tls.cert_subject; content:"ST=Montana"; content:"L=Liverpool"; content:"CN=southnorth.org"; fast_pattern; reference:md5,440e5c0aee33cba3c4707ada0856ff6d; classtype:trojan-activity; sid:2021145; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_05_26, deployment Perimeter, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_23;)