You can check if your file is legitimate by looking at its location and digital signature:
Malware often places an updater.exe in: C:\ProgramData\Google\Chrome\ or %TEMP% folders. ChromeUpdater.exe
Right-click the file, select Properties , and look for a Digital Signatures tab. A genuine file will be signed by Google LLC . Warning Signs of Malware You can check if your file is legitimate
However, because the name is so generic, it is frequently used by (such as "Luma Stealer" or cryptocurrency miners) to hide in plain sight on your computer. How to Tell if Yours is Genuine because the name is so generic
If you encounter any of the following, you may have a "Fake Chrome Update" infection: Article - Fake Chrome Update - Sierra College