alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT KaiXin Landing M3"; flow:established,from_server; file_data; content:"|2a|0xffffffff|2a|"; content:"|2a|str2long|2a|"; content:"|2a|long2str|2a|"; classtype:exploit-kit; sid:2020495; rev:3; metadata:created_at 2015_02_20, signature_severity Major, updated_at 2019_07_26;)