alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - ℹ Virtualbox 🖥"; flow:to_server, stateless; threshold:type limit, track by_src,count 1, seconds 86400; tls_sni; content:"download.virtualbox.org"; nocase; reference:url,https://www.virtualbox.org/; metadata:created_at 2022_03_18, updated_at 2022_06_15; sid:3300796; rev:2; classtype:misc-activity;)