When staff at CyberKeel investigated email activity at a medium-sized shipping firm, they made a shocking discovery.
"Someone had hacked into the systems of the company and planted a small virus," explains co-founder Lars Jensen. "They would then monitor all emails to and from people in the finance department."
Whenever one of the firm's fuel suppliers would send an email asking for payment, the virus simply changed the text of the message before it was read, adding a different bank account number.
"Several million dollars," says Jensen, were transferred to the hackers before the company noticed.
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