According to the German Federal Office for Information Security (BSI), German lawmakers informed the agency of the suspicious activity in early December. The BSI stressed, however, that it did not have knowledge of any plan to release the stolen information until 3 January, when the latest breach was able to be connected to the previous cases.

The breach compromised the personal data of politicians from regional parliaments, the federal parliament, and the European Parliament, the German government stated earlier.

According to media reports, all German parties represented in the Bundestag were hit by the hacker operation, except for the Alternative for Germany (AfD) party.