The Rhysida group, which is thought to operate from Russia and eastern Europe, and was behind a previous attack on the British Museum, has reportedly taken responsibility. It has said on its website it intends to begin auctioning the 5.79 terabytes of data it was able to steal from Berlin in seven days’ time, according to news agency Reuters. […] Officials for the city-state said an initial data leak occurred between August 7 and 12. Then, on August 14, two department networks were shut down, making applications for housing benefits and payments impossible for several days. “Berlin will not be blackmailed,” Wegner said on Friday.
He said state police, prosecutors and federal security services were working to investigate the suspected perpetrators “with the utmost urgency,” adding that inquiries into the “content and scope of the compromised data are being pursued with great intensity.”