alert http $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED MALWARE Unknown Malware Download Attempt"; flow:established,to_server; content:"/installer/Installer"; http_uri; nocase; content:".exe"; http_uri; nocase; pcre:"/\/\d+\/installer\/Installer(Clean)?\.exe$/Ui"; reference:url,malwareurl.com; classtype:bad-unknown; sid:2010796; rev:5; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_22;)