alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK Landing Page Mar 12 2014"; flow:established,from_server; file_data; content:"/[a-zA-Z]/g|3b|"; fast_pattern; content:"/[0-9]/g|3b|"; content:"|22|f"; pcre:"/^\d+r\d+o\d+m\d/R"; content:"|22|p"; pcre:"/^\d+u\d+s\d+h\d/R"; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2018261; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2014_03_12, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2019_07_26;)