alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed FakeExt Domain (fastify .sbs) in TLS SNI"; flow:established,to_server; tls.sni; bsize:11; content:"fastify.sbs"; fast_pattern; reference:url,securityintelligence.com/posts/fakext-targeting-latin-american-banks/; classtype:trojan-activity; sid:2051537; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_03_07, deployment Perimeter, malware_family FakeExt, performance_impact Low, confidence High, signature_severity Major, tag FakeEXT, updated_at 2024_10_03, reviewed_at 2024_10_03;)