alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Fiesta EK IE Exploit Apr 23 2015"; flow:established,from_server; file_data; content:"<title>some"; fast_pattern; content:"<style>"; content:"|5c 3a|*{display|3a|inline-block|3b|behavior|3a|url(#default#VML)|3b|}</style>"; distance:3; within:65; classtype:exploit-kit; sid:2020980; rev:4; metadata:created_at 2015_04_23, confidence High, signature_severity Major, updated_at 2019_10_08;)