alert dns $HOME_NET any -> any any (msg:"ET MALWARE CryptON/Nemesis/X3M Ransomware Onion Domain"; dns.query; content:"xzfsqbdlb3cssp4t"; depth:16; fast_pattern; nocase; reference:url,blog.emsisoft.com/2017/05/01/remove-cry128-ransomware-with-emsisofts-free-decrypter/; reference:url,www.cyber.nj.gov/threat-profiles/ransomware-variants/crypt-on; classtype:trojan-activity; sid:2024523; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_08, deployment Perimeter, malware_family Crypton, malware_family Nemesis, confidence High, signature_severity Major, tag Ransomware_Onion_Domain, 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;)