alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT ClearFake Domain in TLS SNI (bigdownload .xyz)"; flow:established,to_server; tls.sni; bsize:15; content:"bigdownload.xyz"; fast_pattern; reference:url,rmceoin.github.io/malware-analysis/clearfake/; classtype:exploit-kit; sid:2055249; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2024_08_13, deployment Perimeter, deprecation_reason Relevance, performance_impact Low, confidence High, signature_severity Minor, tag Exploit_Kit, tag ClearFake, tag compromised_website, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_17, reviewed_at 2024_10_17;)