alert http $HOME_NET any -> $EXTERNAL_NET 81:90 (msg:"ET EXPLOIT_KIT Sakura - Payload Requested"; flow:established,to_server; content:"Java/1."; http_user_agent; fast_pattern; content:".html"; http_uri; pcre:"/\/[0-9]{4}\.html$/Ui"; classtype:exploit-kit; sid:2016786; rev:6; metadata:created_at 2013_04_26, signature_severity Major, updated_at 2019_10_08;)