alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Base64 http argument in applet (Neutrino/Angler)"; flow:established,from_server; file_data; content:"<applet "; pcre:"/^((?!<\/applet>).)+?[\x22\x27]aHR0cDov/Rs"; content:"aHR0cDov"; fast_pattern; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2016549; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_03_07, deployment Perimeter, malware_family Angler, signature_severity Critical, tag Angler, tag Exploit_Kit, updated_at 2019_10_08;)