alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Sakura/RedKit obfuscated URL"; flow:established,from_server; file_data; content:"<applet"; pcre:"/^((?!<\/applet>).)+?\/.{1,12}\/.{1,12}\x3a.{1,12}p.{1,12}t.{1,12}t.{1,12}h/Rs"; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2015858; rev:3; metadata:created_at 2012_11_01, signature_severity Major, updated_at 2019_07_26, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)