alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed MassLogger Domain in TLS SNI (ecigroup-tw .com)"; flow:established,to_server; tls.sni; content:"ecigroup-tw.com"; bsize:15; reference:url,twitter.com/James_inthe_box/status/1305509852362338304; reference:url,app.any.run/tasks/010a8af5-97bd-4e27-961d-8d202a9d6f29/; reference:md5,0a838f0ecff085eb611e41acf78a9682; classtype:trojan-activity; sid:2030879; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_09_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)