alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK SWF Struct"; flow:established,to_server; content:"/13"; http_uri; fast_pattern; content:".swf"; http_uri; pcre:"/\/13[89]\d{7}.swf$/U"; flowbits:set,et.Nuclear.SWF; flowbits:noalert; classtype:exploit-kit; sid:2018360; rev:11; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2014_04_04, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2019_10_08;)