alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Dyre SSL Cert (fake org name)"; flow:established,from_server; tls.cert_subject; content:"C=AU"; content:"ST=Some-State"; fast_pattern; tls.certs; content:"|06 03 55 04 0a|"; distance:0; pcre:"/^.{2}(?=[a-z]{0,15}\d)(?P<var>[a-z0-9]{4,16}[01]).+?\x06\x03\x55\x04\x0a.{2}(?P=var)/Rs"; reference:md5,c35b37203859b9c0be0e3255a79ed64d; classtype:trojan-activity; sid:2019832; rev:5; metadata:attack_target Client_Endpoint, created_at 2014_12_02, deployment Perimeter, deprecation_reason Relevance, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_03_18;)