alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"🐾 - ℹ Kaspersky 🇷🇺 Antivirus 🛡"; flow:to_client, established; threshold:type limit, track by_dst,count 1, seconds 86400; tls.cert_subject; content:"O=Kaspersky"; nocase; content:"L=Moscow"; nocase; content:"C=RU"; nocase; content:"CN=downloads.upd.kaspersky.com"; fast_pattern; nocase; reference:url,https://www.kaspersky.fr/; metadata:created_at 2021_07_29, updated_at 2022_10_21; sid:3300745; rev:3; classtype:misc-activity;)