2+2=89?

This week we added another unusual detection – detection for a calculator virus.

Virus.TI.Tigraa.a is a memory resident virus, and in the best tradition of DOS viruses, it's a mere 492 bytes in size. It works on Texas Instruments TI-89 graphing calculators (the TI-89, TI-89 Titanium, and the Voyage 200 which will run most programs for the TI-89) with the Motorola 68000 processor. The virus is designed to clear the screen and then display a message saying 't89.GAARA'.

Of course, Tigraa.a is classic proof of concept code. It'll only work on individual calculators, and can't spread. But nevertheless, it's created another entry in the roll call of potentially infectable devices.