alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT RogueRaticate Domain in TLS SNI (import19ksnx9ajsn .com)"; flow:established,to_server; tls.sni; bsize:21; content:"import19ksnx9ajsn.com"; fast_pattern; reference:url,www.malwarebytes.com/blog/threat-intelligence/2023/07/socgholish-copycat-delivers-netsupport-rat; reference:url,twitter.com/AnFam17/status/1671789322259800064; classtype:exploit-kit; sid:2048114; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2023_09_18, deployment Perimeter, deprecation_reason Age, performance_impact Low, confidence High, signature_severity Minor, tag Exploit_Kit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_27, reviewed_at 2023_11_27;)