alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT FlimKit Landing Page"; flow:established,from_server; file_data; content:"|22|0x|22 3b|"; content:"="; distance:0; pcre:"/^[\r\n\s]*?[\x22\x27][a-f0-9]{2}(?P<sep>[^a-f0-9]{1,10})(?P<a>[a-f0-9]{2})(?P=sep)(?P<p>[a-f0-9]{2})(?P=sep)(?P=p)(?P=sep)(?P<l>[a-f0-9]{2})(?P=sep)(?P<e>[a-f0-9]{2})[^\x22\x27]+?(?P=sep)(?P=p)(?P=sep)(?P=a)(?P=sep)[a-f0-9]{2}(?P=sep)(?P=a)(?P=sep)[^\x22\x27]+?(?P=sep)(?P=a)(?P=sep)(?P=l)(?P=sep)[a-f0-9]{2}(?P=sep)(?P=e)/Rsi"; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2017451; rev:6; metadata:created_at 2013_09_11, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)