MITRE ATT&CK Technique: T1173
Open,
Insert tab -> Quick Parts -> Field
Choose = (Formula) and click ok.
After that, you should see a Field inserted in the document with an error “!Unexpected End of Formula”, right-click the Field, and choose Toggle Field Codes.
The Field Code should now be displayed, change it to Contain the following:
{DDEAUTO c:\\windows\\system32\\cmd.exe "/k calc.exe" }