alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Executable Download named to be FQDN"; flow:established,to_server; content:"GET"; nocase; http_method; content:".exe"; http_uri; nocase; fast_pattern; content:"."; depth:200; content:".exe"; nocase; distance:2; within:6; pcre:"/\/.+(www\.)?[a-z0-9]+\.[a-z]{2,3}\.exe$/Ui"; reference:url,malwareurl.com; classtype:trojan-activity; sid:2011496; rev:3; metadata:created_at 2010_09_28, signature_severity Major, updated_at 2019_07_26;)