alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Evrial Domain (cryptoclipper .ru in TLS SNI)"; flow:established,to_server; tls.sni; content:"cryptoclipper.ru"; endswith; reference:md5,5a71cc1c1ea541eb47638218a25c4123; classtype:trojan-activity; sid:2025201; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_16, deployment Perimeter, malware_family Evrial, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)