alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BabyShark CnC Domain in SNI"; flow:to_server,established; tls.sni; content:"fmchr.in"; endswith; reference:url,unit42.paloaltonetworks.com/new-babyshark-malware-targets-u-s-national-security-think-tanks/; classtype:command-and-control; sid:2026981; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_02_25, deployment Perimeter, malware_family BabyShark, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_16;)