This is exactly the sort of thing that a saboteur would want its targets to think.

“If sovereign and subject are in accord, put division between them.” —Sun Tzu, The Art of War

That's the exact sort of thing the military would want us to think, because 'we were hacked by another nation' sounds a lot better than 'we fired the people responsible for food logistics'. You're not going to be able to divine the real reason this way.