The malicious codes are normally referred as malware. Systems are vulnerable to the traditional attacks, and attackers continue to find new ways around existing protection mechanisms in order to execute their injected code. Malware is a pervasive problem in distributed computer and network systems. These new malicious executables are created at the rate of thousands every year. There are several types of threat to violate these components; for example Viruses, Worms, Trojan horse and Malware. Malware represents a serious threat to confidentiality since it may result in loss of control over private data for computer users. It is typically hidden from the user and difficult to detect since it can create significant unwanted CPU activity, disk usage and network traffic.