kruptof

How about making some kind of rootkit that will over see all files that are opened and then just chuck away anything with an avi extension. You could properly give the rootkit a password or a setup file and make it ask for passwords and if the wrong passwords is entered have it play a video from a pool of "safe videos" that way it won't seem as if you're hiding something and if she asks how come she can put in any password and it still works, just say it's a project that you havent finished yet.

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Kilo

Rootkit! That's not a bad idea at all. I have the book on them but really only know that they are windows drivers. Does anyone have a premade rootkit that is used specifically for monitoring all file handling?

Any quicker solutions?

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kruptof

You could have the program(not rootkit) go through the system and make a list of all the media files and associate all media files with that program and then have the program verify the person, if they fail verification open up the default player and play the requested file, if the person is verified provide them with the list and play the requested files from there.

But the downside of this maybe that if the person just gets the player out and opens the file, the program would not help at all, you could overwrite the header of all media files to something that your program is familiar with, or just have your program running in the background and scramble all files coming in unless specified and then descramble the file when it’s being played (after being verified of course).

You might want to look into truecrypt, that gives you to containers an outside one and all so an inner hidden one, save all your files in the inner one and password protect it but don’t password protect the outer one (optional).

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Soulstorm

I would have some ideas on how to do this on OS X... I don't know for Windows, but let me give you an idea, if anyone hasn't already done that.

You need a small program that will open at startup, and remain open until the user logs off. When a user opens a file, the program will check its extension, and if it is one of the extensions you don't want to open, then you will close that file immediately after it opens.

I know that in OS X you can do that with Cocoa, or even a simple applescript application, but I don't know what technologies you can use on Windows, sorry. But I hope I gave you an idea.

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Kilo

I'm not sure why this thread was moved. I need to know how to tackle this programmaticaly using C# and not for 1 computer for 20+.

Exactly! That is what I planned to do from the start. My problem is that I have no idea how I could check the extension of a file being opened. I googled it many times, searched many forums and ended up here.

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xavier

Even if you check the extension ... what makes you think the user won't just change the extension ?

I'll stick with my idea : have a list of allowed programs and close all others .
Cause if you allow media player just for music, i'll change the extension and still be able to play.

You would have to find the actual file type - ... and i have no idea how to do that

Found something :
This is probably the way to go, maybe see if you can found a ready made library ... or something
http://www.microsoft.com/whdc/driver...v/default.mspx
http://channel9.msdn.com/Showpost.aspx?postid=36907

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bigguy

I made a program called Download Blocker, but i've added a thing for users to specify what to block, it includes programs to. I'd be willing to let you have it. All your boss has to do is add the EXE to all the video players on his computer, and when they are run the program shuts them down.

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Kilo

It sounds good but we don't want to block an application from running we want to block AVI and other video formats from opening at all.

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King

If you don't want AVI files to run on the computer, why don't you just remove all the AVI files off of the computer?

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Kilo

Doing so still gives the user the option to download and run more AVI files. Remember this is for about 20+ computers. I need to be able to detect when a file is going to be executed and stop it from opening. This is the only way to do it. Now all I need is some methods to getting this done.

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