alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Nuclear EK SilverLight Exploit"; 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:"AppManifest.xaml"; fast_pattern; classtype:exploit-kit; sid:2019917; rev:7; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_12_11, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2024_03_03;)