CVE-2021-40444 traces in registry

Author: Neo23x0

sysmonconfig-export.xml

@@ -790,6 +790,7 @@
 			<TargetObject condition="contains">Microsoft\Cryptography\Providers\Trust\</TargetObject> <!-- Important trust registry values to monitor -->
 			<TargetObject condition="contains">WOW6432Node\Microsoft\Cryptography\Providers\Trust\</TargetObject> <!-- Important trust registry values to monitor -->
 			<TargetObject condition="contains">Control\Print\Environments\Windows x64\Drivers</TargetObject> <!-- PrinterNightmare coverage -->
+			<TargetObject name="Context,ContactedDomain" condition="end with">\EnableBHO</TargetObject> <!--Microsoft:Office: Contacted domains stored here 'HKEY_CURRENT_USER\<SID>\SOFTWARE\Microsoft\Office\16.0\Common\Internet\Server Cache\<domain>\EnableBHO' -->
 		</RegistryEvent>
 	</RuleGroup>