In the previously, host level and network level HTTP botnet detection systems are proposed. Most of the current botnet detection techniques are designed only for specific botnet C&C communication protocols and structures. Consequently, when botnets change their C&C architecture, protocols and utilize encrypted communications, these methods will not be effective in detecting them. Hence developing techniques to detect botnets regardless of the C&C architecture as well as with encrypted communications will be a need of the hour. The main focus of this work is to design an efficient botnet detection system irrespective of the C&C structures by analyzing the traffic flow of networks.