The article, published in De Telegraaf on 3 February, claimed that a bunch of IP addresses had been obtained during the break-in, supposedly to help in tracing the source of a leak in the Dutch parliament. The leak was claimed to have been helping Russia.
In a blog post, Kaspersky Lab chief executive Eugene Kaspersky said that the person who supposedly carried out the hack had denied it. Further digging had located the alleged source of the story, a former Dutch minister Willem Vermeend.
Vermeend and the hacker in question had written a book on cyber security some time back, but the tome was pulled from sale because of plagiarism, Eugene claimed.
It said that on 25 May, a defamation complaint had been filed, both against De Telegraaf and Vermeend.
The European Parliament recently passed a resolution on cyber security, in which it referred to Kaspersky Lab's software as having been confirmed to be malicious. It did not provide any source for this claim.
In a related development, Kaspersky Lab has filed an appeal against the recent US federal district court's decisions on the company's constitutional challenges to the US ban on use of its products and services.
In a statement, the company said: "Given the importance of these issues to Kaspersky Lab and its customers and partners, Kaspersky Lab has filed an emergency motion for expedited consideration of its case in federal appellate court.
"The motion highlights the errors in the lower court's analysis, the harm Kaspersky Lab is currently suffering from the unfair targeting of its products and services, and the compelling interest in deciding the appeal quickly before the US Government's complete prohibition of Kaspersky Lab's products and services on federal systems takes effect on October 1, 2018."