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Scanning programs? How do they know they have a virus?

 
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goldengold
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PostPosted: Sat Oct 13, 2007 7:56 am    Post subject: Scanning programs? How do they know they have a virus? Reply with quote
I was just curious how excactly virus scanners find harmful things in the program? Doesn't matter weather it's spyware or a worm.

The thing i first thought of was if they scan the code and see the what functions and things.
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Heartless
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PostPosted: Sat Oct 13, 2007 8:00 am    Post subject: Reply with quote
I wanted to know this too.
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oib111
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PostPosted: Sat Oct 13, 2007 8:38 am    Post subject: Reply with quote
Yea. I want to know this too. Whenever I think about it I think about it like the way you are. They go into the programs and take a look at the code. But how is it getting the code?
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Flyte
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PostPosted: Sat Oct 13, 2007 11:32 am    Post subject: Reply with quote
They scan the files and the memory the computer is currently using for signatures. This is why anti-virus companies are constantly updating their program database, because a small change in a virus (or polymorphic code) would render the scanner useless, as the signature has changed.
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goldengold
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PostPosted: Sun Oct 14, 2007 8:06 am    Post subject: Reply with quote
Oh, Cool
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