Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Malware derived from malicious software is a computer program of software which is designed by spiteful programmers to enable them to disturb computer operation, gather sensitive information, or gain unauthorized access to computer systems. Used as a general term to describe any softwares which are hostile and intrusive, malware includes Trojan horses, worms, computer viruses, roolkits, spyware, adware and other malicious programs...You can learn more about malware with the help of this book.