alert dns $HOME_NET any -> any any (msg:"ET MALWARE Naikon DNS Lookup (greensky27.vicp.net)"; dns.query; content:"greensky27.vicp.net"; depth:19; nocase; endswith; fast_pattern; reference:url,threatconnect.com/camerashy-resources/; classtype:trojan-activity; sid:2021831; rev:5; metadata:created_at 2015_09_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;)