alert dns $HOME_NET any -> any any (msg:"ET MALWARE lu0bot CnC Domain in DNS Lookup"; dns.query; content:"lu03.xyz"; nocase; bsize:8; reference:url,fumik0.com/2021/06/24/lu0bot-an-unknown-nodejs-malware-using-udp/; classtype:domain-c2; sid:2033178; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_24, deployment Perimeter, malware_family lu0bot, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_24;)