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Website spoofing is the act of creating a website, as a hoax, with the intention of misleading readers that the website has been created by a different person or organization. Normally, the spoof website will adopt the design of the target website and sometimes has a similar URL. A more sophisticated attack results in an attacker creating a "shadow copy" of the World Wide Web by having all of the victim's traffic go through the attacker's machine, causing the attacker to obtain the victim's sensitive information.
The objective may be fraudulent, often associated with phishing or e-mail spoofing, or to criticize or make fun of the person or body whose website the spoofed site purports to represent. Because the purpose is often malicious, "spoof" (an expression whose base meaning is innocent parody) is a poor term for this activity so that more accountable organisations such as government departments and banks tend to avoid it, preferring more explicit descriptors such as "fraudulent" or "phishing".
As an example of the use of this technique to parody an organisation, in November 2006 two spoof websites, www.msfirefox.com and www.msfirefox.net, were produced claiming that Microsoft had bought Firefox and released "Microsoft Firefox 2007."
Spoofed websites predominate in efforts developing anti-phishing software though there are concerns about their effectiveness. A majority of efforts are focused on the PC market leaving mobile devices lacking You can see from the table below that few user studies have been run against the current tools in the market. 
|Tool||Communication media||Device||Countermeasure type||Performance metrics||User study conducted?|
|Anti-phish||Website/browser add-on||PC||Profile matching /usage history||-||-|
|BogusBiter||Website/browser add-on||PC||Client server authentication||Page load delay||No|
|Cantina+||Website/browser add-on||PC||Machine learning /classification||TPR ≈ 0.92
FPR ≈ 0.040
|Quero||Website/browser add-on||PC||Text mining /regular expressions||-||-|
|Itrustpage||Website/browser add-on||PC||Profile matching/ blacklist||Accuracy=0.98||Yes|
|SpoofGuard||Website||PC||Profile matching / pattern||TPR≈0.972,
|PhishZoo||Website||PC||Profile matching/ pattern||Accuracy≈0.96,
|Page load delay
|PhishTester||Website||PC||Profile matching/ pattern||FNR≈0.03, FPR≈0||No|
|DOM AntiPhish||Website||PC||Profile matching/ layout||FNR≈0, FPR≈0.16||No|
|PhishNet||Website||PC||Profile matching /blacklist||FNR≈0.05,
|PhorceField||Website||PC||Client server authentication||Bits of Security Lost per user = 0.2||Yes|
|PassPet||Website||PC||Profile matching/ usage history||Security and Usability||Yes|
|PhishGuard||Website||PC||Client server authentication||-||-|
|PhishAri||Social network||PC||Machine learning /classification||Precision = 0.95,
Recall = 0.92
|MobiFish||Mobile||Smart Phone||Profile matching/ layout||TPR≈1||No|
|AZ-protect||Website||PC||Machine learning /classification||Precision = 0.97,
Recall = 0.96
|eBay AG||Website/browser add-on||PC||Machine learning /classification||Precision = 1,
Recall = 0.55
|Netcraft||Website/browser add-on||PC||Profile matching /blacklist||Precision = 0.99,
|EarthLink||Website/browser add-on||PC||Profile matching /blacklist||Precision = 0.99,
Recall = 0.44
|IE Filter||Website/browser add-on||PC||Profile matching /blacklist||Precision = 1,
Recall = 0.75
|FirePhish||Website/browser add-on||PC||Profile matching /blacklist||Precision = 1,
Recall = 0.77
|Sitehound||Website/browser add-on||PC||Profile matching /blacklist||Precision = 1,
Recall = 0.23
DNS is the layer at which botnets control drones. In 2006, OpenDNS began offering a free service to prevent users from entering website spoofing sites. Essentially, OpenDNS has gathered a large database from various anti-phishing and anti-botnet organizations as well as its own data to compile a list of known website spoofing offenders. When a user attempts to access one of these bad websites, they are blocked at the DNS level. APWG statistics show that most phishing attacks use URLs, not domain names, so there would be a large amount of website spoofing that OpenDNS would be unable to track. At the time of release, OpenDNS is unable to prevent unnamed phishing exploits that sit on Yahoo, Google etc.
- "Spoof website will stay online", BBC News, 29 July 2004
- Anti-Phishing Technology", Aaron Emigh, Radix Labs, 19 January 2005
- See e.g.  or 
- "Fake Sites Insist Microsoft Bought Firefox", Gregg Keizer, InformationWeek, 9 November 2006
- "Phishing environments, techniques, and countermeasures: A survey". Computers & Security. 68: 280. July 2017. doi:10.1016/s0167-4048(04)00129-4. ISSN 0167-4048 – via ScienceDirect.
- "Dark Reading | Security | Protect The Business - Enable Access". Dark Reading. Retrieved 2018-06-29.