Russia-linked APT28 hackers planted malware in German government networks. The malicious code was undetected for as long as a year. The hackers exfiltrated 17 gigabytes of data that could be used in further attacks against the German Government. In 2015 the APT group hacked into the systems of the German Parliament. The German Government discovered the intrusion in December but the experts believe that the hackers were inside the networks as long a year. The attack was isolated and brought under control, the Interior Ministry said.”]
Source: https://securityaffairs.co/wordpress/69682/hacking/apt28-hacked-german-government.html