In the context of expansion of using Vehicular Ad-hoc Networks-VANETs in the medical field around the world, studying the attacks on these networks becomes an urgent need to overcome these attacks and to serve a safe use in medical applications. In this paper, we will focus on a fabrication attack scenario which is one of the most dangerous attacks on VANETs’ reliability. Our simulations are built using VANET-SIM simulator, in which we study the fabrication attack using three different scenarios that is taking place in Lattakia city.