alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT DotkaChef Landing URI Struct"; flow:established,to_server; content:"/?"; http_uri; content:"LvoDc0RHa8NnZ"; http_uri; pcre:"/\/\?={0,2}[A-Za-z0-9\+\/]+?LvoDc0RHa8NnZ$/U"; flowbits:set,et.exploitkitlanding; reference:url,www.kahusecurity.com/2013/analyzing-dotkachef-exploit-pack/; classtype:exploit-kit; sid:2017893; rev:4; metadata:created_at 2013_12_21, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)