alert dns $HOME_NET any -> any any (msg:"ET MALWARE Keyboy CN APT CnC Domain in DNS Lookup"; dns.query; content:"serve1.mooo.com"; bsize:15; nocase; classtype:domain-c2; sid:2028952; rev:1; metadata:attack_target Client_Endpoint, created_at 2019_11_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag APT, updated_at 2019_11_07;)