alert dns $HOME_NET any -> any any (msg:"ET MALWARE OSX/KeRanger Ransomware CnC DNS Request 3"; dns.query; content:"nejdtkok7oz5kjoc"; depth:16; nocase; fast_pattern; reference:url,researchcenter.paloaltonetworks.com/2016/03/new-os-x-ransomware-keranger-infected-transmission-bittorrent-client-installer; classtype:command-and-control; sid:2022600; rev:4; metadata:attack_target Client_Endpoint, created_at 2016_03_07, deployment Perimeter, malware_family OSX_KeRanger, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_01, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)