alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed External IP Lookup Domain (ufile .io in TLS SNI)"; flow:established,to_server; tls.sni; bsize:8; content:"ufile.io"; fast_pattern; classtype:misc-activity; sid:2049262; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_11_20, deployment Perimeter, former_category INFO, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_11_20; target:src_ip;)

Metadata
attack_target	Client_Endpoint
created_at	2023_11_20
deployment	Perimeter
former_category	INFO
performance_impact	Low
confidence	High
signature_severity	Informational
updated_at	2023_11_20