alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Internet Explorer Memory Corruption Vulnerability (CVE-2015-2444)"; flow:from_server,established; file_data; content:"<style"; nocase; pcre:"/^[^>]*?>\s*?form\s*?\{\s*?-ms-behavior\s*?\x3a\s*?url/Rsi"; content:"x-ua-compatible"; nocase; pcre:"/^[\x22\x27]\s*content\s*=\s*[\x22\x27]\s*IE\s*=\s*10/Rsi"; content:"<button"; nocase; content:"<label"; nocase; distance:0; content:"<form"; nocase; distance:0; content:"<meter"; nocase; distance:0; content:"<optgroup"; nocase; distance:0; content:"<meter"; nocase; distance:0; content:"-ms-behavior"; nocase; fast_pattern; reference:cve,2015-2444; classtype:attempted-user; sid:2021709; rev:5; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2015_08_24, cve CVE_2015_2444, deployment Perimeter, confidence Medium, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_10_08;)