alert dns $HOME_NET any -> any any (msg:"ET RETIRED Earth Lusca/SprySOCKS CnC Domain in DNS Lookup"; dns.query; dotprefix; content:".confenos.shop"; nocase; endswith; reference:url,www.trendmicro.com/en_us/research/23/i/earth-lusca-employs-new-linux-backdoor.html; classtype:domain-c2; sid:2048105; rev:2; metadata:affected_product Linux, attack_target Client_and_Server, created_at 2023_09_18, deployment Perimeter, former_category MALWARE, malware_family SprySOCKS, performance_impact Low, confidence High, signature_severity Major, updated_at 2025_04_17, reviewed_at 2025_04_17;)