German government compromised?

There are two interesting articles (unfortunately, in German) which describe an apparent hack on German government PCs, using infected Word and PowerPoint files.

From Andreas Marx:

This stuff is really interesting, even if the articles are -- right now -- only available in German language. They are telling the readers that hackers from China have installed trojans on many PCs of the German government (and related

organizations) using "infected" DOC and PPT files (using 0day exploits?).

At the time, the infections were found, the IT people were able to hinder the transfer from 160 GB of "remaining data" -- it is unknown how many data has already been transferred earlier. For details, please look at the two articles below.

Articles in Spiegel (and Spiegel 2) and Heise (and Heise 2).