alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - 🚨 OpenWRT router 🖧"; threshold:type limit, track by_src,count 1, seconds 86400; flow:to_server, stateless; tls_sni; content:"downloads.openwrt.org"; nocase; ja3.hash; content:"a2803909422270f7a3758db642a8f7b9"; fast_pattern; reference:url,https://openwrt.org/; metadata:created_at 2022_08_22, updated_at 2023_03_20; sid:3300282; rev:4; classtype:policy-violation;)