alert dns $HOME_NET any -> any any (msg:"ET MALWARE Suspected DNS2TCP Auth"; dns.query; content:".=auth."; fast_pattern; pcre:"/^[A-Za-z0-9\/\-\+]{40,}\.=auth\./"; classtype:trojan-activity; sid:2026416; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_09_26, deployment Perimeter, malware_family DNS2TCP, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2020_08_25;)