Spyware Defined
Observable aspects of spyware infestation include:
- personal Web or email client settings change unexpectedly
- unwanted accessories or tool bars appear spontaneously
- unsolicited advertisements crop up at random
Some less savory and less apparent aspects of spyware behavior include:
- targeted data harvesting to collect personal or financial data
- secretive backdoor capability to allow surreptitious reentry
- complete or partial remote control over the infected computer
The Effects Of Spyware
Spyware is a costly form of malware, both in terms of time and money spent resolving the problems it causes. Most spyware is commercially produced and distributed, which explains why it has become such a pervasive form of malware. Ultimately, spyware can take away more than just time or money from infested end-users. Certain types of spyware are designed to steal ad revenue from legitimate sites or modify search queries by redirecting them to channels specified by the spyware's creator.
The various forms and implementations of spyware range from the generally frowned-upon to the outright illegal. A presumably benign form may collect statistical data on Website visits for marketing purposes - perhaps to formulate better target demographics for an upcoming campaign of adware or spam solicitations. Another form of spyware collects more than just statistical data, and harvests financial information, bank and credit card numbers, logon credentials and other personal information to redistribute to third-parties with bad intent. Ouch!
