alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Zingo/GinzoStealer CnC Domain (nominally .ru in TLS SNI)"; flow:established,to_server; tls.sni; content:"nominally.ru"; bsize:12; fast_pattern; reference:md5,b918a1b21063907a9bbf4dda8259bd78; reference:url,blog.talosintelligence.com/2022/04/haskers-gang-zingostealer.html; classtype:domain-c2; sid:2036249; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_19, deployment Perimeter, malware_family ZingoStealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_19, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)