This is a typical boot sector virus, which was reported to be in the
wild in Estonia in December 1995. Virus contains no text, although
texts 'Gnu', 'Gru', 'Gtt' and 'Gpu' can be seen in it's code. These
are, however, part of the virus code and not text messages.
Int_AA was also reported to be in the wild in France in March 1996.
[Analysis: Mikko Hypponen, F-Secure]