alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Unknown EK Using Office/.Net ROP/ASLR Bypass"; flow:established,to_client; file_data; content:"unescape"; nocase; fast_pattern:only; content:"[|22|replace|22|]("; nocase; content:"/g"; distance:0; pcre:"/^[\r\n\s]*?\,[\r\n\s]*?[\x22\x27][\%\\]u"/Rsi"; classtype:exploit-kit; sid:2017487; rev:4; metadata:created_at 2013_09_19, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)