alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to Known Fenrir Ransomware CnC Domain"; dns.query; content:"fenrir-ransomware.000webhostapp.com"; depth:35; nocase; endswith; fast_pattern; reference:md5,a5ecf27bfab7fbb1ace3ec9a390b23bd; classtype:command-and-control; sid:2024467; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_13, deployment Perimeter, malware_family Ransomware, malware_family Fenrir, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)