alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/Flooder.Agent.NAS CnC Domain in DNS Lookup"; dns.query; content:"vtboss.yolox.net"; nocase; endswith; reference:md5,060b0ce9e6d625b57abd2ba23d38d513; reference:url,blog.talosintelligence.com/2017/03/threat-roundup-0306-0310.html; classtype:domain-c2; sid:2028632; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_09_26, deployment Perimeter, malware_family Win32_Flooder_Agent_NAS, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_10;)