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is the copying a virus on hard disk the same of executing it ?


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#1 northBRIDGE

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Posted 27 June 2011 - 09:14 AM

hi, as said in the title I'd like to know if copying a virus, or just an infected file, is the same of executing it

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#2 Didier Stevens

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Posted 28 June 2011 - 05:06 AM

No, it is not the same.

Copying an executable does not execute it, but there are some rare cases involving vulnerabilities were an executable can be executed just by reading it.

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#3 ONT

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Posted 28 June 2011 - 05:16 AM

it depends on the virus type, location of copying etc.

#4 Andrew

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Posted 28 June 2011 - 05:45 AM

No, it is not the same.

Copying an executable does not execute it, but there are some rare cases involving vulnerabilities were an executable can be executed just by reading it.

There are cases where even opening the file's directory in Windows Explorer can trigger an infection (via bugs in preview handlers, for example.)

#5 Didier Stevens

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Posted 28 June 2011 - 06:50 AM

There are cases where even opening the file's directory in Windows Explorer can trigger an infection (via bugs in preview handlers, for example.)

Correct, here's an example of this: http://blog.didierstevens.com/2009/03/04/quickpost-jbig2decode-trigger-trio/

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#6 northBRIDGE

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Posted 28 June 2011 - 07:27 AM

thanks everybody, your posts have been very usefull ! :thumbup2:




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