alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT ClearFake Domain in TLS SNI (autoupdatethis .com)"; flow:established,to_server; tls.sni; bsize:18; content:"autoupdatethis.com"; fast_pattern; reference:url,rmceoin.github.io/malware-analysis/clearfake/; classtype:exploit-kit; sid:2069901; rev:1; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2026_06_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Critical, tag Exploit_Kit, tag ClearFake, updated_at 2026_06_10;)