"The Clampi virus, which is spreading rapidly across
hundreds of thousands of computers in Britain and the United
States, infects computers when users visit websites that host a
"Once on the computer, the virus sits unnoticed until the user
logs on to bank, credit card or other financial websites. It then
captures log-in and password information and sends it to a server
run by the attackers. They can then tell the compromised computer
to send money to accounts that they control, or they can buy goods
with the stolen credit card details.
"The trojan has a list of more than 4,500 finance-related
websites that it monitors, including British high street banks.
Security experts warned that it was one of the stealthiest and most
pervasive threats to computers using the Microsoft Windows