Breakthrough Technologies For Surviving a Hack
Bloomberg Businessweek|July 27, 2020
How a big manufacturer beat ransomware attackers without paying the ransom
William Turton
Breakthrough Technologies For Surviving a Hack

At around midnight Oslo time on March 19, 2019, computers owned by Norsk Hydro ASA, a large aluminum manufacturer, started encrypting files and going offline en masse. It took two hours before a worker at its operations center in Hungary realized what was happening. He followed a scripted security procedure and took the company’s entire network offline—including its website, email system, payroll, and everything else. By then, a lot of damage was already done. Five hundred of Hydro’s servers and 2,700 of its PCs had been rendered useless, and a ransom note was flashing on employees’ computer screens.

“Greetings!” the note began. “There was a significant flaw in the security system of your company. You should be thankful the flaw was exploited by serious people and not some rookies. They would have damaged all your data by mistake or for fun.” The message instructed recipients to write to an email address to discuss an unspecified payment, which would have to be made in Bitcoin; in exchange, the hackers would provide an encryption key to reverse the damage.

Like most other large multinationals, Hydro had been at least aware of the possibility of attack. It had a cyber insurance policy, and it had tested its networks with “white hat” hackers—security consultants who attempt to break into a system to check its defenses. “I wouldn’t say we could keep the NSA out,” says Chief Information Officer Jo De Vliegher. “But we were a company with all the normal security in place.”

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