Hackers are using pop-up ads to steal bank details from home computers, it was revealed yesterday. They have planted a 'trojan' virus inside the bogus ads, which appear on screen without any warning. Clicking on the close button to get rid of the advert triggers the virus, which then attempts to install itself on the computer. It waits until the user logs on to their Internet bank account, then it steals personal details such as passwords, by reading key strokes. These are then passed back to the hacker. The virus, named 'pwsteal.refest', marks a new level of sophistication for Internet...