alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY REG files version 5 download"; flow:established; content:"Windows Registry Editor Version 5.00"; content:"|0D 0A|"; content:"["; content:"HKEY_"; nocase; reference:url,www.ss64.com/nt/regedit.html; classtype:misc-activity; sid:2000421; rev:10; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)