Hacker Group Threatens to Release Miljödata Breach Data Sunday

A hacker group has claimed responsibility for a significant data breach targeting Miljödata, a key system supplier for Sweden's public sector. The group is now threatening to publish stolen personal information this Sunday, according to a report by TV4 Nyheterna. An IT security expert confirmed the threat was posted on the darknet following a major IT attack on Miljödata's systems on August 23. Miljödata is a critical technology provider, with 80 percent of Swedish municipalities relying on its systems to manage sensitive employment information. The breach has compromised the personal data of hundreds of thousands of public sector employees. Notable affected entities include Gothenburg city, which has over 165,000 current and former employees; Region Skåne, with 101,000 individuals impacted; Stockholm city, affecting over 40,000 employees; and Linköping municipality, with 28,000 current and former employees. The compromised data includes personal identification numbers, phone numbers, addresses, and employment IDs. Individuals with protected identities were not affected. Reports suggest Miljödata has been subjected to extortion in relation to the cyberattack, with the perpetrators motivated by financial gain. The IT security expert deems it "highly probable" that the group will proceed with publishing the data, noting that any delays could be a negotiation tactic.