alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Nuclear EK Payload URI Struct Oct 5 2014 (no alert)"; flow:established,to_server; content:"/14"; http_uri; fast_pattern; pcre:"/\/14\d{8}(?:\/\d+)*?(?:\/x[a-f0-9]+[\x3b0-9]*)?$/U"; flowbits:set,et.Nuclear.Payload; flowbits:noalert; classtype:exploit-kit; sid:2019358; rev:12; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_10_06, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2019_10_08;)