Hackers who hijacking other browsers mining XMR , may know nothing about XMR

When visiting some less formal website, often encounter the following figure situation ——

At this time, your computer may have a great chance of becoming someone's "miner."
Monroecoin (XMR), using ring-shaped encryption technology, is known for its strong anonymity.
But XMR has another feature —— as long as a piece of malicious javascript code is inserted into the site, visitors can help hackers mining XMR.
Project-poi introduced today is such a website.
https://coinhive.com/
This site offers everyone a mining code for the website, at the price of 30%. Its original intention is good —— mining through appropriate users to reduce the advertisement of the site, to achieve a win-win situation. As shown in the following figure, you can verify by using the verification code during login. It occupies only about 10 seconds on the user's PC and has little impact on user equipment.

However, this site also reduces the cost of hackers, will be required to reduce the technology to almost 0, as long as hackers get the site permissions, even know nothing about the blockchain, you can use this site ready-made code mining.
Specific operations, this site has been described in great detail, it will not elaborate.