Thousands of computers at home after a hacker infiltrated a high-profile announcement infected booby traps

Tens of thousands of people are afraid that your computer by a list of a booby trap on the site, including the London Stock Exchange as totally cyber-attacks that has carefully planned on Sunday began infected.

Fraud, in which the ad in Auto Trader, Vue and six other locations, from Sunday to infiltrate the villain in an advertising agency IT systems.

Malicious ad was later released, causes a false virus warning-up is on the computer pop those who are interested in browsing Web sites.Then they say that their computer is infected, remove the obligation to pay screen diagnosis of "infection".Suspected fraud relating only PC users with Safari, Chrome and Firefox.

Some areas with vicious ads, including the London Stock Exchange, closing out their website.IT managers in the affected advertisers, Unanimis, then spent three hours removing malware.

"The ads have decided to change was not widespread," says David Nelson, Director of Operations and IT Unanimis told the BBC.

"This, coupled with the terrorist attacks that occurred on Saturday night, limited to how many people fall victim.

"We should consider ourselves lucky in some sense."

The study was conducted, in which cyber-criminals on the first server Unanimis access, and because the injury was not detected earlier.

Today the company to identify all sites, the victims have refused to fall hack, but said that the ad network - he said that all players - owned by France Telecom Orange Group.

Patrik Runaldo, senior research manager at Websense, has affected many people believe were of dubious line.

"We believe that such a number of websites, ads," he said, told the BBC, shows that number could reach "tens of thousands."