alert dns $HOME_NET any -> any any (msg:"ET MALWARE Ransomware Locky .onion Payment Domain (f5xraa2y2ybtrefz)"; dns_query; content:"f5xraa2y2ybtrefz"; depth:16; fast_pattern; nocase; reference:md5,5eeeeb093ee02d3769886880f8a58a90; classtype:trojan-activity; sid:2023247; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_09_19, deployment Perimeter, malware_family Ransomware, malware_family Locky, confidence High, signature_severity Major, tag Ransomware_Onion_Domain, tag Ransomware, updated_at 2019_08_30, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)