Typosquatting, also called URL hijacking, a sting site, or a fake URL, is a form of cybersquatting, and possibly brandjacking which relies on mistakes such as typographical errors made by Internet users when inputting a website address into a web browser. Should a user accidentally enter an incorrect website address, they may be led to any URL (including an alternative website owned by a cybersquatter).
The typosquatter's URL will usually be one of four kinds, all similar to the victim site address (e.g. example.com):
Once in the typosquatter's site, the user may also be tricked into thinking that they are in fact in the real site; through the use of copied or similar logos, website layouts or content.
There are several different reasons for typosquatters buying a typo domain:
Many companies, including Verizon, Lufthansa, and Lego, have garnered reputations for aggressively chasing down typosquatted names. Lego, for example, has spent roughly US$500,000 on taking 309 cases through UDRP proceedings.
From 2006 to 2008, a typosquatted variant of Google called 'Goggle.com' existed. Visiting the website would cause the domain to automatically download various computer viruses and other malicious software to the computer, including the rogue antispyware program SpySheriff. The website today is a catalog of Amazon listings.
Celebrities have also frequently pursued their domain names, from singers to star athletes. Prominent examples include Basketball player Dirk Nowitzki's UDRP of DirkSwish.com and actress Eva Longoria's UDRP of EvaLongoria.org.
An example of corporate typosquatting is yuube.com, targeting YouTube users by having it programmed to redirect to a malicious website or page. Similarly, www.airfrance.com has been typosquatted by www.arifrance.com, diverting users to a website peddling discount travel. Other examples are Equifacks.com (Equifax.com), Experianne.com (Experian.com), and TramsOnion.com (TransUnion.com); these three typosquatted sites were registered by comedian John Oliver for his show Last Week Tonight.