Well, the Entente, together with the Whites, couldn't do it. I don't think that the Germans, without a German-aligned Russian entity to draw popular support, could do it.
The Allies never gave the Whites more than half-hearted support, and it wasn't until the second half of 1919 that a serious attempt was made to capture Moscow or Petrograd--and by then the Bolsheviks were too strong for the Whites.
Here I'm talking about something quite different: actual use of the troops of a victorious German army in 1918, when the Bolsheviks were still quite weak militarily. People who don't think this is likely should recall that the German government
almost did it in OTL even with a life-or-death struggle on the Western Front underway! The difference between Ludendorff (who wanted to liquidate the Bolsheviks immediately) and the Foreign Office (which wanted to tolerate them for now) concerned only the short run. Nobody could forget that while the Bolsheviks were the only party in Russia backing Brest-Litovsk, they were also quite openly backing revolution in Germany. And again note the Kaiser's words in deciding to temporarily support the Bolsheviks: "without foreclosing future opportunities."