alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Redkit Landing Page URL March 03 2013"; flow:established,from_server; file_data; content:"applet"; fast_pattern; content:"u33&299"; within:200; content:"u3v7"; within:50; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2016587; rev:6; metadata:created_at 2013_03_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)