alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - ℹ Trend Micro 🇯🇵 Antivirus 🛡"; flow:to_server, stateless; threshold:type limit, track by_dst,count 1, seconds 86400; tls_sni; content:".icrc.trendmicro.com"; fast_pattern; nocase; reference:url,https://www.trendmicro.com/; metadata:created_at 2022_10_21, updated_at 2022_10_21; sid:3300760; rev:1; classtype:misc-activity;)