McCormack only moved to Craven Cottage this summer, in an £11 million switch from Leeds, but rumours that he could be set for a swift exit are already surfacing.
The club's Communications Director Sarah Brookes has already moved to publicly deny these reports, but Derby seem unperturbed with talks apparently set to commence in the near future.
The chances of them actually pulling off the transfer look slim, given the fee that Fulham paid to sign McCormack just six months ago, but it would be a statement of intent if they were able to.
Steve McClaren is said to be hopeful of getting a deal done because the Cottagers have still not paid the entire fee promised to Leeds.
For the Whites to receive the full payment for McCormack they were relying on them getting promoted this season and Derby would be looking to do a similar sort of transfer.
McClaren's men reportedly would be putting a sizeable initial fee towards signing McCormack, but they would only be prepared to repay the full £11 million if they did reach the Premier League.
It means that it could offer Fulham a chance to make an unlikely profit on the Scotland international, who has not scored as regularly as hoped at Craven Cottage.
Although he remains a huge attacking influence on the side, McCormack has only netted five times and, in that sense, he has been a disappointment.
Derby already have Chris Martin in their ranks, but McClaren is thought to be aiming to bolster his forward ranks in the new year. Luc Castaignos, who plays for Dutch side FC Twente is believed to be on their wishlist, while Blackburn Rovers winger Ben Marshall is also being tracked.