alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed OSX/GMERA.A CnC Domain (appstockfolio .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"appstockfolio.com"; depth:17; endswith; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/mac-malware-that-spoofs-trading-app-steals-user-information-uploads-it-to-website; classtype:domain-c2; sid:2028619; rev:3; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2019_09_24, deployment Perimeter, malware_family OSX_GMERA_A, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)