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Russia carried out cyberattacks against infrastructure and websites in Denmark in 2024 and 2025, Danish authorities say in a new assessment published this week describing new cases not previously reported.
Moscow was responsible for “destructive and disruptive” cyberattacks on a Danish water utility company in 2024 and a series of denial of service attacks which overwhelmed Danish websites ahead of regional and local elections last month, Denmark’s Defense Intelligence Service said in a statement Thursday. The water company said the attack caused pipes to burst, leaving homes temporarily without water.
Jan Hansen, the head of the Tureby Alkestrup Waterworks southwest of the capital Copenhagen, said his advice to other companies was not to cut costs on cybersecurity and to take out cyber insurance. The attack happened, he said, because the waterworks switched to cheaper cybersecurity, which was not as secure as that previously.
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The Danish intelligence service said the attacks were part of Russia’s “hybrid war” against the West and an attempt to create instability. It said Moscow’s cyberattacks are part of a broader campaign to undermine and punish countries which support Ukraine. Russian hackers have previously been accused of carrying out hacks on other water facilities in Europe — including on a Norwegian dam where Norwegian authorities said hackers opened valves to allow water to pour out.