The infection kicked off warnings from a fake security program |
Analysis of the LSE site suggests that over the last 90 days, about 363 pages had hosted malware.
The LSE said its site was now safe and an investigation showed that ads provided by a third party were the culprit.
One victim claimed his PC was made unusable after being infected.
Security expert Paul Mutton fell victim when he viewed the site on 27 February.
He visited the LSE homepage to find out why some people reported that they could not access it.
The site was blocked by Firefox, he said, but accessible via Google's Chrome browser.
"It seemed to work with Chrome but then a few seconds later, without having to click on anything, pop-ups started to appear," he said.
The malicious code closed down several of the programs Mr Mutton was using and stopped new ones being started.
"I visited the site and it compromised my machine," said Mr Mutton.
While he was fighting to regain control of his machine, the malware kicked off fake virus alerts in pop-up windows. One window was a fake security scanner which claimed it had detected lots of different malware on the PC.
Mr Mutton said his machine fell victim despite being updated with the latest batch of virus definitions earlier in the day.
Source: BBC News (click the link for the full story)
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