Store file in MBR

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3.00/5 (4 votes)

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Is it possible to access Master Boot Record (MBR) of a system. Can we store our file/data in MBR through c# coding? Please explain.

Posted 27-Jan-11 0:11am

sk saini

Updated 27-Jan-11 0:24am

v3

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4 solutions

Solution 1

Why do you want to store your file on MBR? It is not file storage location. There are plenty other locations to store your files. Assuming that you are not asking for malicious activity, you can not read/write directly using C#. That would be very high level language with no API, but it is doable using P/Invoke.

Posted 27-Jan-11 0:26am

Yusuf

Updated 28-Jan-11 1:04am

v2

Comments

sk saini 27-Jan-11 6:29am

I want to keep some inportant data/file on my client system that should not be corrupted/mishandeled by him or any one else there.

sk saini 27-Jan-11 6:32am

My purpose is to keep security of my software on client systems. The file/data size can be of 100-150 kb (max.).

Sergey Alexandrovich Kryukov 27-Jan-11 22:46pm

Yusuf,
It would be all correct if you did not mention "language". This is merely a matter or API, languages -- in traditional meaning of this term in programming -- are irrelevant.
Thank you.
--SA

Yusuf 28-Jan-11 7:03am

Oops, slip of the ~~tongue~~ fingers. Corrected!

Sergey Alexandrovich Kryukov 28-Jan-11 12:03pm

Nice pun! (Oh, I do understand -- unintended :-)
Be careful, also has some sexual connotation -- well, your understand... :-)
I just voted "5".
--SA

Solution 2

This is possible; Yusuf is right. As to your purpose, this looks like a children Hide-and-Seek game.

If you need security, do yourself a favor, learn about security. I hint? Security is not based on secret hidden techniques; if one person knows, another person can learn it. Security is based on commonly known open algorithms. You think open and secret is a contradiction? This is because you did not learn about security.

Thank you and good luck,

—SA

Posted 27-Jan-11 16:54pm

Sergey Alexandrovich Kryukov

Solution 4

I think this is what you need - it was featured today.
Driver to Hide Processes and Files[^]

Much better than messing with the MBR, which will probably kill the OS (or vice versa) anyway.

Posted 28-Jan-11 3:10am

Indivara

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Debojyoti Majumder · Accepted Answer · 2011-01-28T02:11:00

It's a big task.

First try to make a function using VC++ (as a dll project) to write to MBR.

To do so look for the windows API in MSDN such as
CreateFile
http://msdn.microsoft.com/en-us/library/aa363858%28VS.85%29.aspx[^]
DeviceIoControl
http://msdn.microsoft.com/en-us/library/aa363216%28VS.85%29.aspx[^]

Then using C# pInvoke signature use LoadLibrary(), GetProcAddress() call your function which writes to MBR

But you will also face security problem, hence I recommend you to visit this link
Understanding .NET Code Access Security[^]