alert dns $HOME_NET any -> any any (msg:"ET MALWARE Ransomware/Coverton Onion Domain Lookup"; dns_query; content:"lnc57humvaxpqfv3"; depth:16; nocase; fast_pattern; reference:md5,c5c4f4860c69ea7469ca3be3caf5bf18; classtype:trojan-activity; sid:2022675; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_03_28, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_30, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)