Hackers have leaked over one million data records stolen from Berlin’s city hall onto the darknet, according to the regional public audiovisual group RBB. The data became available for download in multiple batches after the deadline for a ransom demand had passed. Berlin’s mayor, Kai Wegner, confirmed that "sensitive data" had been taken from the city's administration and pledged to contact affected individuals "as soon as possible." The German government has stated it is closely monitoring the investigation into the breach, according to a spokesperson. The leaked data included a wide range of information, such as fire department risk assessments, salary lists, banking details, scanned identity documents, confidential staff information, and files related to the expansion of the German chancellery, according to Der Spiegel. The hackers had initially demanded a ransom of about two million euros, as reported by Der Spiegel. The cyberattack, which took place on August 14, disrupted several city administrations, including those responsible for housing and the environment, cutting them off from the network for a week. This disruption caused housing allowance applications and their subsequent payments to be halted for several days. The hacker group believed to be behind the attack is Rhysida, according to several media outlets. This group previously claimed responsibility for an attack on the British Library in London during the autumn of 2023, demanding a ransom of 20 bitcoins (equivalent to over 760,000 euros at the time). The British Library refused to pay the ransom, and Rhysida later posted approximately 500,000 files containing personal data of visitors, subscribers, and staff on the darkweb. The group is known for targeting public institutions and using ransomware attacks to extort money or leak sensitive data.