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QUESTION POSED ON: 02 August 2001
Can a virus reside in a computer's complementary metal-oxide semiconductor (CMOS)? Is there a way to detect that my CMOS memory has a virus? Is there a way to repair a CMOS memory once it is altered by a virus?
Can a jpg file be infected by a virus?
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No, a virus cannot reside in the CMOS. A virus can corrupt the data stored in the CMOS, and there are many programs which can verify if this data has been altered from a stored copy. Yes, one can use a program to replace the CMOS data with the
original data.
It is possible to store a file in another file (including image files) -- this is
called stegnography. However, it is not the same thing as "infecting,"
as the image file is just used as a container, and the virus would have
to be extracted by another program before it could run. Just viewing the
image would nor trigger it.
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