alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - ℹ Avast 👾 Antivirus 🛡"; flow:to_server, stateless; threshold:type limit, track by_src,count 1, seconds 86400; http.user_agent; content:"Avast"; nocase; reference:url,https://www.avast.com/; metadata:created_at 2021_07_28, updated_at 2022_06_13; sid:3300744; rev:11; classtype:misc-activity;)