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| Browser hijacking ： ウィキペディア英語版 |
Browser hijacking
Browser hijacking is a form of unwanted software that modifies a web browser's settings without a user's permission, to inject unwanted advertising into the user's browser. A browser hijacker may replace the existing home page, error page, or search page with its own.〔(【引用サイトリンク】title=Browser Hijacking Fix & Browser Hijacking Removal )〕 These are generally used to force hits to a particular website, increasing its advertising revenue.
Some browser hijackers also contain spyware, for example, some install a software keylogger to gather information such as banking and e-mail authentication details. Some browser hijackers can also damage the registry on Windows systems, often permanently.
Some browser hijacking can be easily reversed, while other instances may be difficult to reverse. Various software packages exist to prevent such modification.
Many Browser Hijacking programs are included in software bundles that the user did not choose, and are included as "offers" in the installer for another program, often included with no uninstall instructions, or documentation on what they do, and are presented in a way that is designed to be confusing for the average user, in order to trick them into installing unwanted extra software.〔(【引用サイトリンク】title=Malwarebytes Potentially Unwanted Program Criteria )〕〔(【引用サイトリンク】url=http://arstechnica.com/security/2009/12/av-comparatives-picks-eight-antipua-winners/ )〕〔(【引用サイトリンク】url=http://about-threats.trendmicro.com/us/archive/grayware/GENERIC_GRAYWARE )〕〔(【引用サイトリンク】website=https://www.malwarebytes.org/pup/ )〕
==Background==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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