UPDATE 1: CTH makes a good point, and has some fun:
In a follow-up tweet Krugman states: “The Times is now on the case”.
Apparently calling the police for a forensic review was out of the question, or something. Very odd.
Next up: Crowdstrike! Wait for it….
UPDATE 2: Crowdstrike would come in handy if it was a server in Ukraine that placed the stuff on Krugman's computer. Or was this Putin helping Trump again?