As a cyber crime platform

botnet is one of the biggest network security threats.Researching the evolvement of botnets

as well as possible botnets construction methods

can improve us in-depth understanding of details of botnets

and also guide us in the botnets defense research.In this paper

we proposed a P2P-based super botnet structure

analyzed the feasibility and discussed all aspects of this new type botnet.Secondly

we evaluated effectiveness of various botnets defense strategies

our simulation results show that

when taking the actual operational conditions into account

it is difficult to completely destroy P2P-based botnets.Finally

we discussed some guidelines for defending against such new botnets.