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[?]Would it still contain virus?

 
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tjake
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PostPosted: Sat Feb 09, 2008 10:46 pm    Post subject: [?]Would it still contain virus? Reply with quote
I dont know if this belong here(Please move this to the correct place if this dont belong here), but i have a question.

Lets say a program contained a virus.
I online virus scan(jotti or virustotal) that virused program
The Results comes out as clean.
Even thought it comes out clean, would it still have virus in it?
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Flyte
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PostPosted: Sat Feb 09, 2008 10:50 pm    Post subject: Re: [?]Would it still contain virus? Reply with quote
tjake wrote:
Lets say a program contained a virus.
...
Even thought it comes out clean, would it still have virus in it?


Congratulations, you answered your own question!
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tjake
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PostPosted: Sat Feb 09, 2008 10:51 pm    Post subject: Re: [?]Would it still contain virus? Reply with quote
Flyte wrote:
tjake wrote:
Lets say a program contained a virus.
...
Even thought it comes out clean, would it still have virus in it?


Congratulations, you answered your own question!


i guess that means it doesnt contain virus. what if it lies? lol
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atom0s
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PostPosted: Sat Feb 09, 2008 10:54 pm    Post subject: Re: [?]Would it still contain virus? Reply with quote
tjake wrote:
I dont know if this belong here(Please move this to the correct place if this dont belong here), but i have a question.

Lets say a program contained a virus.
I online virus scan(jotti or virustotal) that virused program
The Results comes out as clean.
Even thought it comes out clean, would it still have virus in it?


Although I agree with what Flyte said, but, yes. Virii are constantly being made under rapid development. A handful are made probably every day, even more at that. Which means the definitions that virus scanners use need to be updated to accommodate with the new virii that are leaked onto the net. Just because a virus scanner says it's safe, that doesn't mean it is.

An EXE can contain pretty malicious code but still come back clean even with the most basic of methods to destroy someones computer. Virus scanners work on byte array scanning methods to compare to known virus "signatures" inside of files. Certain methods to do something to a computer usually use the same set of bytes for opcodes which is what is stored in a database and used when scanning a file.

So yea.. don't believe or trust everything a program tells you. After all, its only man made Wink
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SF
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PostPosted: Sat Feb 09, 2008 10:54 pm    Post subject: Reply with quote
Virus' can hide in programs, set a system restore point before running it if you're weary about it being infected.
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Lorrenzo
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PostPosted: Sat Feb 09, 2008 11:00 pm    Post subject: Reply with quote
Yes, if someone made it themselves and it's good.
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Flyte
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PostPosted: Sat Feb 09, 2008 11:12 pm    Post subject: Reply with quote
Its best to run potential viruses in a Virtual Machine with RegMon and FileMon running.
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