alert dns $HOME_NET any -> any any (msg:"ET MALWARE Glupteba CnC Domain in DNS Lookup"; dns.query; content:"clubhouse.site"; nocase; depth:14; endswith; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/glupteba-campaign-hits-network-routers-and-updates-cc-servers-with-data-from-bitcoin-transactions/; classtype:command-and-control; sid:2027950; rev:3; metadata:attack_target Client_Endpoint, created_at 2019_09_05, deployment Perimeter, malware_family Glupteba, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_17;)