alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT FiestaEK js-redirect"; flow:established,to_server; http.uri; content:"/?"; fast_pattern; pcre:"/^\/[a-z0-9]+[0-9][a-z0-9]+\/\?\d$/"; classtype:exploit-kit; sid:2017567; rev:5; metadata:created_at 2013_10_08, signature_severity Major, updated_at 2020_09_21;)