alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Flash Exploit Likely SunDown EK"; flow:established,from_server; flowbits:isset,HTTP.UncompressedFlash; file_data; content:"9090909090909090909090909090909090909090EB"; classtype:exploit-kit; sid:2023313; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2016_10_03, deployment Perimeter, malware_family SunDown, performance_impact Low, confidence Medium, signature_severity Major, tag Exploit_Kit_Sundown, updated_at 2019_07_26;)