Re: run a program in memory , not from hard

From:
"Ben Voigt [C++ MVP]" <rbv@nospam.nospam>
Newsgroups:
microsoft.public.vc.mfc,microsoft.public.vc.language
Date:
Wed, 12 Mar 2008 10:59:46 -0500
Message-ID:
<OMsv3mFhIHA.5752@TK2MSFTNGP03.phx.gbl>
Joseph M. Newcomer wrote:

You read the resource into memory. You then go through and do
rebasing of all the necessary pointers. You convert the memory to
executable memory. You run the code in a separate thread. It is one
of the interesting ways to insert malware into an application. What
is odd is that the OP claims it is necessary for "security" reasons.
The reason it is hard to do (and SHOULD be impossible!) is for much
deeper and more compelling security reasons.

It is not stated why this code has to be in a resource, and can't
simply be linked into the executable, or stored as a DLL. It seems


I think I already suggested linking the code and just calling CreateThread,
checking.... yup.

But there are some good reasons for wanting a separate process:
- Writing a minidump should be done out-of-process
- If the code should run with reduced rights, restricted token, lower
mandatory security level, etc.

There's no reason this should be impossible if you create the process. And
there are already checks to prevent you from injecting code into an existing
process (if the security descriptors were set correctly).

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