alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Anti-virus-pro.com Fake AV Checkin"; flow:established,to_server; content:"/stat.php?machine_id={"; nocase; http_uri; pcre:"/machine_id={[A-F0-9]+-[A-F0-9]+-[A-F0-9]+-[A-F0-9]+-[A-F0-9]+}/Ui"; classtype:trojan-activity; sid:2007886; rev:5; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)