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The self-proclaimed hacktivists told CNN that they were able to penetrate Disney’s system thanks to “a man with Slack access who had cookies.”

It is unusual for hackers to claim they are "Russian hacktivists" with an ethical agenda - most cyber criminals, including those in Russia, aim to make money by extorting their victims.

Earlier this year, a Russian-linked “hacktivist” tried to disrupt operations at several Texas utilities.

Attackers could include “hacktivists” seeking to make a political statement and cyberextortionists bent on lucre.

Wu was a member of China’s first hacktivist group, Green Army — a group known informally as the “Whampoa Academy” after a famed Chinese military school.