alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Upatre or Dyre SSL Cert Jan 22 2015"; flow:established,to_client; tls.cert_serial; content:"00:"; startswith; bsize:26; tls.cert_subject; content:"C=CN, ST=ST"; fast_pattern; tls.certs; content:"|06 03 55 04 07|"; pcre:"/^.{2}(?P<var>[a-zA-Z0-9]{24}[01]).+?\x06\x03\x55\x04\x07.{2}(?P=var)/Rs"; classtype:trojan-activity; sid:2020290; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_01_23, deployment Perimeter, malware_family Upatre, confidence Medium, signature_severity Critical, tag SSL_Malicious_Cert, tag Exploit_Kit, tag Downloader, tag Upatre, updated_at 2022_03_27;)