Here are a few examples of commonly seen spyware programs:

(Please note that while researchers will often give names to spyware programs, they may not match the names the spyware-writers use.)

CoolWebSearch, a group of programs, that install through “gaps” found in Internet Explorer. These programs direct traffic to advertisements on Web sites including coolwebsearch.com. This spyware nuisance displays pop-up ads, rewrites search engine results, and alters the computer host file to direct the Domain Name System (DNS) to lookup preselected sites.

Internet Optimizer (a/k/a DyFuCa), likes to redirect Internet Explorer error pages to advertisements. When the user follows the broken link or enters an invalid URL, a page of advertisements pop up.

180 Solutions reports extensive information to advertisers about the Web sites which you visit. It also alters HTTP requests for affiliate advertisements linked from a Web site. Therefore the 180 Solutions Company makes an unearned profit off of the click through advertisements they’ve altered.

HuntBar (a/k/a WinTools) or Adware.Websearch, is distributed by Traffic Syndicate and is installed by ActiveX drive-by downloading at affiliate websites or by advertisements displayed by other spyware programs. It’s a prime example of how spyware can install more spyware. These programs will add toolbars to Internet Explorer, track Web browsing behavior, and display advertisements.