alert http $HOME_NET any -> [216.157.99.0/24,72.51.32.0/20,76.74.152.0/21] any (msg:"ET EXPLOIT Possible HanJuan Flash Exploit"; flow:to_server,established; content:".swf"; http_uri; fast_pattern:only; pcre:"/^\/(?:[a-z0-9]{3,7}\/)?[a-z]{3,7}\.swf$/U"; classtype:trojan-activity; sid:2019674; rev:2; metadata:created_at 2014_11_07, confidence Medium, signature_severity Major, updated_at 2019_07_26;)