Aluminium firm cyber-attack cost at least £25.6m

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Notices to employees at Hydro's office.
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Employees were told not to connect to the company network by notices on the doors of Hydro’s offices

A cyber-attack on a Norwegian aluminium company has cost it at least 300 million Norwegian kroner (£25.6m).

Hydro, which employs 35,000 people in 40 countries, was hit by malware last week.

The company said it was slowly bringing affected systems back online but the “preliminary” cost of the incident had been about 300-350 million kroner.

Most of those losses had been in its Extruded Solutions division, which makes doors and windows, Hydro said.

Business impact

Overall production in this division was down 20-30% and in one of its business units was “at a standstill”.

And machines normally automatically controlled by computers were being operated manually.

However, the company has won praise from cyber-security experts for its transparency.

Kevin Beaumont said in a detailed blog about the cyber-attack that it had revealed “the best incident representation response plan I’ve ever seen”.

And Dale Paterson, who advises commercial companies on cyber-security issues, praised Hydro’s latest update as “tremendous” for detailing the business impact of the attack.

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