alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Unknown EK Landing Page"; flow:established,from_server; file_data; content:"<applet"; content:"site.A.class"; within:300; classtype:exploit-kit; sid:2016106; rev:2; metadata:created_at 2012_12_28, confidence Medium, signature_severity Major, updated_at 2019_07_26;)