alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Executable Download named to be FQDN"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"."; content:".exe"; distance:2; within:6; nocase; endswith; fast_pattern; pcre:"/\/.+(www\.)?[a-z0-9]+\.[a-z]{2,3}\.exe$/i"; reference:url,malwareurl.com; classtype:trojan-activity; sid:2011496; rev:4; metadata:created_at 2010_09_28, signature_severity Major, updated_at 2024_03_18;)