alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY REG files version 4 download"; flow:established; content:"REGEDIT4"; content:"|0D 0A|"; distance:0; content:"["; distance:0; content:"HKEY_"; distance:0; nocase; reference:url,www.ss64.com/nt/regedit.html; classtype:misc-activity; sid:2000420; rev:11; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)