alert dns $HOME_NET any -> any any (msg:"ET MALWARE Gamaredon CnC Domain in DNS Lookup"; dns.query; content:"clsass.ddns.net"; nocase; depth:15; endswith; reference:url,www.intezer.com/blog-evilgnome-rare-malware-spying-on-linux-desktop-users/; classtype:command-and-control; sid:2027726; rev:3; metadata:attack_target Client_Endpoint, created_at 2019_07_18, deployment Perimeter, malware_family Gamaredon, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_17;)