  There are plenty of security software in market; each claiming the best,
still we daily face problem of viruses and other malicious activities. If we
know the basic working principal of such malware then we can very easily
prevent most of them even without security software. Hackers and crackers are
experts in psychology to manipulate people into giving them access or the
information necessary to get access. This paper discusses the inner working of
such attacks. Case study of Spyware is provided. In this case study, we got
100% success using social engineering techniques for deception on Linux
operating system, which is considered as the most secure operating system. Few
basic principal of defend, for the individual as well as for the organization,
are discussed here, which will prevent most of such attack if followed.
