alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT FlimKit Post Exploit Payload Download"; flow:to_server,established; urilen:17; http.method; content:"POST"; http.uri; pcre:"/^\/[a-f0-9]{16}$/"; http.header; content:"Content-Length|3a 20|0|0d 0a|"; fast_pattern; http.connection; content:"close"; depth:5; endswith; http.protocol; content:"HTTP/1.0"; http.header_names; content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Connection|0d 0a 0d 0a|"; depth:38; endswith; classtype:exploit-kit; sid:2016869; rev:7; metadata:created_at 2013_05_21, performance_impact Significant, signature_severity Major, updated_at 2024_04_08;)