alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"🐾 - ℹ Avira 🇩🇪 Antivirus 🛡"; flow:to_client, established; threshold:type limit, track by_dst,count 1, seconds 86400; tls.cert_subject; content:"O=Avira Operations GmbH"; nocase; content:"C=DE"; nocase; content:"CN=dispatch.avira-update.com"; fast_pattern; nocase; reference:url,https://www.avira.com/fr/; metadata:created_at 2023_06_04, updated_at 2023_06_04; sid:3300761; rev:1; classtype:misc-activity;)