The Times warns that there is a highly sophisticated Trojan virus, Clampi, on the loose that steals online banking log-in details from infected computers.
The Clampi virus is spreading rapidly across hundreds of thousands of computers in Britain and the US.
The virus captures log-in and password information wrt financial sites, and sends it to a server run by the cyber criminals. 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 virus 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 operating systems.
Monitor your accounts closely.