alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OSX/Proton.B Domain in SNI"; flow:established,to_server; tls.sni; content:"handbrake.biz"; bsize:13; fast_pattern; classtype:trojan-activity; sid:2024285; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_05_09, deployment Perimeter, malware_family OSX_Proton_B, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2022_03_18;)