alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Nuclear SilverLight Exploit"; flow:established,from_server; flowbits:isset,et.Nuclear.SilverLight; file_data; content:"PK"; within:2; content:"AppManifest.xaml"; classtype:exploit-kit; sid:2019669; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_11_07, deployment Perimeter, malware_family Nuclear, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2019_07_26;)