alert dns $HOME_NET any -> any any (msg:"ET MALWARE Suspected fraud-bridge DNS Tunnel"; threshold:type both, track by_src, count 60, seconds 10; dns.query; content:"AAAA--."; pcre:"/^[A-Za-z0-9\/\-\+]{10,}AAAA--\./s"; classtype:trojan-activity; sid:2026418; 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 fraud_bridge, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2020_08_25;)