alert dns $HOME_NET any -> any any (msg:"ET DELETED test CnC Domain in DNS Lookup"; dns.query; dotprefix; content:".to.sv"; nocase; endswith; classtype:trojan-activity; sid:2035217; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_02_18, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_22;)