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Mysterious virus hits websites
25/06/2004 07:31 - (SA)
Chicago - US government and industry experts have warned of a mysterious, large-scale internet attack against thousands of popular websites.
The virus-like infection tries to implant hacker software onto the computers of all website visitors.
Industry experts and the Homeland Security Department were studying the infection late on Thursday to determine how it spreads across websites and find adequate defences against it.
"Users should be aware that any website, even those that may be trusted by the user, may be affected by this activity and thus contain potentially malicious code," the US government warned in an internet alert.
The mysterious infection appeared to target at least one recent version of software by Microsoft to operate websites, called its Internet Information Server, popular among businesses and organisations.
A spokesperson for Microsoft declined to comment immediately.
Experts said the attack's effects were unusually broad but weren't substantially interfering with internet traffic.
"While this is significant, it has no impact on the operation of the internet," said Marcus Sachs, who helps run the industry's Internet Storm Centre in Bethesda.
Experts urgently recommended consumers and corporate employees to update the antivirus software on their computers, since the latest versions can immunise visitors to infected websites.
The infected websites attempt to implant on visitors' computers hacker software that allows others to use their computers to surreptitiously route internet spam e-mails.
On the net:
www.uscert.gov
isc.sans.org
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