About recovery and disk sector

Hi, I have a theoretical question: if I create an image of my active partition C, and then I recover the image alone changement in C, does the image overwrites exactly the original sectors, one by one ?

More generally: I find a malware in C - I delete it - then I recover a clean image; the recovering overwrites the sectors in the identical position that C had ? If yes, the overwriting is like a wiping if the malware left some track in my system.