alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed Malicious DNS Query (Reyptson Ransomware CnC)"; dns.query; content:"37z2akkbd3vqphw5"; startswith; nocase; fast_pattern; reference:md5,2f60c2dc9b89a78a450839ded2a1737a; classtype:command-and-control; sid:2024469; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_17, deployment Perimeter, malware_family Ransomware, malware_family Reyptson, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)