alert dns $HOME_NET any -> any any (msg:"ET RETIRED SOMNIRECORD Backdoor DATA Command in DNS Query"; dns.query; content:"-DATA-"; fast_pattern; pcre:"/^[a-z0-9]{3}-DATA-[a-f0-9]{6}/i"; reference:url,www.elastic.co/security-labs/not-sleeping-anymore-somnirecords-wakeup-call; classtype:trojan-activity; sid:2044746; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_22, deployment Perimeter, former_category MALWARE, malware_family SOMNIRECORD, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30, reviewed_at 2024_09_30; target:src_ip;)