Wireless Sensor Networks have been studied in depth for several decades and entire books are devoted to the subject. Their main role is to provide bridges between the virtual world of information technology and the real physical world. They represent a fundamental paradigm shift from traditional inter-human personal communications to autonomous inter-device communications. They promise unprecedented new abilities to observe and understand large-scale, real-world phenomena at a fine spatio-temporal resolution. As a result, Wireless Sensor Networks also have the potential to engender new breakthrough scientific advances. In this paper, the objective is to simulate and analyze the performance of routing protocols for Wireless Sensor Networks using a scenario based experiment in order to observe the network's behavior under all the simulated attacks. Moreover, it is examined through the simulation results if there is a pattern in all these attacks that could be used to detect or prevent a set of attacks.