In Coca-Cola's case, hackers masqueraded as Coca-Cola's chief executive, sending an email to Paul Etchells, Coca-Cola's deputy president for the Pacific region.

BBC: Coca-Cola bottles

Bloomberg reported that one executive - deputy president of Coca-Cola's Pacific Group, Paul Etchells - opened an email he thought was from the company's chief executive.

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The email contained a malicious link which was clicked on - allowing for hackers to install keyloggers and other forms of malware on Mr Etchells' machine.

BBC: Coca-Cola bottles