During the keynote at CES 2015, Sony lashed out at the cyber attackers who stress passed into its internal network.
The attack on the company’s film division network also led to the cancellation of the release of one of its films, ‘The Interview‘.
The BBC reported Sony CEO Kazuo Hirai as saying: "Both Sony, former employees and current employees were the victim of one of the most vicious and malicious cyber attacks in recent history."
Hirai added: "I have to say that I’m very proud of all the employees, and certainly the partners who stood up against the extortionist efforts of criminals, and worked tirelessly, sometimes for days on end to bring you The Interview."
According to reports the attacks were carried out to prevent the release of The Interview, a comedy film about journalists hired to murder North Korean leader Kim Jong Un.
The sensitive subject matter of the movie led US authorities to charge North Korea for the cyber assault, which the country later denied.
Hirai said the film will not be released in major theaters but will be showcased at independent theaters and online, reported the Daily Mail Online.