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The expert on stolen data on Darknet

Published on September 14, 2025

Information on at least 200 people with a protected identity has also leaked, reports TV4 News. Advertisement Hundreds of thousands of municipal employees have leaked.Photo: Shutterstock Open Image in Hull Screen Pontus Johnson, professor and director of the Cyber ​​defense center.Photo: Private Open Image in full screen The data has leaked after a cyber attack on the system supplier environmental data, which delivers HR systems to a large part of Sweden's municipalities.The stolen information includes, among other things, social security numbers, telephone numbers, and addresses of hundreds of thousands of municipal employees around the country. Pontus Johnson, professor at KTH and expert on cyber security, describes it as a very large leak. - But it seems that it is to a large extent information that was still known and accessible on the Internet, and then the problem is less. - On the other hand, it is often the case that you do not really know exactly what information has leaked and that the latter will appear information that there was sensitive data that has leaked, he continues. Such information could be personal data for people who have a protected identity.These people should not be included in the environmental data system.But Johnson warns that their information may have leaked anyway, as it can usually be so. Protected information seems to have leaked And so seems to have happened.Techen contractor Jens Nylander has been able to find information about at least 200 people who have protected information, he tells TV4 News. He has so far only gone through the material that leaked from the City of Stockholm and not the rest of the country. - I did a sample on individual cases and can find that if you have a protected population record address, then that address should not be known simply.But in this leaked material from what is said to be the City of Stockholm, where the address is clear. The City of Stockholm has previously denied that they have shared protected personal data with environmental data, according to TV4 News. Warning: May have the identity cut The leak poses an increased risk of identity theft, says Pontus Johnson. - It is difficult as an individual to do so much, if you do not want to change your name or address. However, most of the data is already out on the internet and is available on pages such as Eniro and Ratsit, which means that the risk of identity creation is not much greater than it is in normal cases. Russian hacker groups The hacker group DataCarry has taken on the attack, reports SVT. Pontus Johnson does not know the group but believes that the hacker environment is dynamic and that similar groups often change both names and members. - Most people operate from Russia, and are quite professional.They do this to make money, he says. The intrusion into environmental data was discovered on August 23 and the hackers have since threatened to publish the data.According to data, they must have required 1.5 Bitcoin - equivalent to SEK 1,600,000 - so as not to leak the information.