alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT HanJuan EK Landing March 24 2015 M1"; flow:established,from_server; file_data; content:"document.createElement|28|"; pcre:"/^\s*?(?P<q1>[\x22\x27])(?:(?!(?P=q1)).)+?(?P=q1)\.replace\(\/\[[A-Za-z]{10,}\]/R"; content:"/g,|27 27|).substr|28|"; fast_pattern; within:14; pcre:"/^\s*?\d+,\s*?\d/R"; classtype:exploit-kit; sid:2020743; rev:3; metadata:created_at 2015_03_25, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)