I suspect the "Financial System" being referred to is the SWIFT system and chances are in the next few years it will be replaced by a new Sino-Russian system backed by Saudi oil.
No cyber attacks will be needed to bring SWIFT down, just a few too many sanctions being wielded like cudgels by over eager bureaucrats trying to impose their "Morality" on the rest of the world.
I suppose it is possible that is the point, they want to be prepared for the backlash sure to follow when the Greenback is no longer the reserve currency.