alert dns $HOME_NET any -> any any (msg:"ET MALWARE Scarlet Mimic DNS Lookup 47"; dns_query; content:"filegoogle.firewall-gateway.com"; depth:31; nocase; endswith; fast_pattern; reference:url,citizenlab.org/2016/03/shifting-tactics/; classtype:trojan-activity; sid:2022612; rev:5; metadata:created_at 2016_03_11, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_09_28;)