alert http1 $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK SWF"; flow:established,to_client; flowbits:isset,et.Nuclear.Exploit; flowbits:set,et.Nuclear.Payload; http.header; content:"Content-Disposition|3a 20|inline|3b 20|filename="; pcre:"/^[a-z0-9]*\r\n/R"; file.data; content:"CWS"; startswith; fast_pattern; classtype:exploit-kit; sid:2019846; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2014_12_03, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2024_04_07;)