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  4. Is it possible to block access to a specific registry key?

Is it possible to block access to a specific registry key?

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  • T turbosupramk3

    I will give you a single reason :) I want to write a remote desktop application with the ability to stop the legal banner from popping up therefore not requiring user action before the login/password/domain are sent, because that hoses the entire process since that window handle cannot be identified (because the contents are encrypted) I cannot close that legal banner pop up window ... however if I can stop it from opening then the result is the same.

    D Offline
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    Dave Kreskowiak
    wrote on last edited by
    #6

    You might want to check with your legal department first. You might not get away with circumventing that little screen, as annoying as it is.

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    • D Dave Kreskowiak

      You might want to check with your legal department first. You might not get away with circumventing that little screen, as annoying as it is.

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      Dave Kreskowiak

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      turbosupramk3
      wrote on last edited by
      #7

      If I can figure out how to do it, I will then ask ... no point in asking ahead of time if I can't do it. Any idea how to do the block?

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      • T turbosupramk3

        If I can figure out how to do it, I will then ask ... no point in asking ahead of time if I can't do it. Any idea how to do the block?

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        Pete OHanlon
        wrote on last edited by
        #8

        That's ass end backwards. Is there any reason to waste time researching how to do this if your legal department tells you that you can't do it? You're just costing your company money here.

        I'm not a stalker, I just know things. Oh by the way, you're out of milk.

        Forgive your enemies - it messes with their heads

        My blog | My articles | MoXAML PowerToys | Onyx

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        • T turbosupramk3

          If I can figure out how to do it, I will then ask ... no point in asking ahead of time if I can't do it. Any idea how to do the block?

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          Dave Kreskowiak
          wrote on last edited by
          #9

          Sure, you just have to add Deny permissions to the SYSTEM account to key immediately above what you want to block. I'd open regedit first, try setting this by hand yourself, and then see what happens. You may not be able to reverse what you've done. That being the case, I highly suggest trying this on a virtual machine or a machine you don't care about rebuilding. Since WinLogon is also responsbile for loading the User Profile, you may get the ability to skip the legal screen, but lose the ability to completely login to the machine. You may also never get a shell, and you may lose all network connectivity to off-machine resources, such as network shares, ..., among other things... Do you still think this is a good idea?? I know I wouldn't consider it a supportable solution in an Enterprise environment, or any other environment for that matter.

          A guide to posting questions on CodeProject[^]
          Dave Kreskowiak

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          • D Dave Kreskowiak

            Sure, you just have to add Deny permissions to the SYSTEM account to key immediately above what you want to block. I'd open regedit first, try setting this by hand yourself, and then see what happens. You may not be able to reverse what you've done. That being the case, I highly suggest trying this on a virtual machine or a machine you don't care about rebuilding. Since WinLogon is also responsbile for loading the User Profile, you may get the ability to skip the legal screen, but lose the ability to completely login to the machine. You may also never get a shell, and you may lose all network connectivity to off-machine resources, such as network shares, ..., among other things... Do you still think this is a good idea?? I know I wouldn't consider it a supportable solution in an Enterprise environment, or any other environment for that matter.

            A guide to posting questions on CodeProject[^]
            Dave Kreskowiak

            T Offline
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            turbosupramk3
            wrote on last edited by
            #10

            Since RDP encrypts the window and no one seems to have cracked that, I'm not sure if there is another solution besides this one? I'd much rather go the route of decrypting the window contents, looking for the legal banner window handle to appear and sending an enter key to that the moment it appears, but I'm not even sure that is possible. I'm all ears if anyone has any other ideas ...

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            • P Pete OHanlon

              That's ass end backwards. Is there any reason to waste time researching how to do this if your legal department tells you that you can't do it? You're just costing your company money here.

              I'm not a stalker, I just know things. Oh by the way, you're out of milk.

              Forgive your enemies - it messes with their heads

              My blog | My articles | MoXAML PowerToys | Onyx

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              turbosupramk3
              wrote on last edited by
              #11

              If you have another way to do this, I am all ears

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              • T turbosupramk3

                Since RDP encrypts the window and no one seems to have cracked that, I'm not sure if there is another solution besides this one? I'd much rather go the route of decrypting the window contents, looking for the legal banner window handle to appear and sending an enter key to that the moment it appears, but I'm not even sure that is possible. I'm all ears if anyone has any other ideas ...

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                Dave Kreskowiak
                wrote on last edited by
                #12

                Hey, I told you how to test this little theory out by hand. What's the point in trying to type in a bunch of code if the entire concepts won't work from the start. I can see a bunch of reasons why it won't, but I'm not going to test this for you. That's what you're getting paid to do.

                A guide to posting questions on CodeProject[^]
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                • D Dave Kreskowiak

                  Hey, I told you how to test this little theory out by hand. What's the point in trying to type in a bunch of code if the entire concepts won't work from the start. I can see a bunch of reasons why it won't, but I'm not going to test this for you. That's what you're getting paid to do.

                  A guide to posting questions on CodeProject[^]
                  Dave Kreskowiak

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                  turbosupramk3
                  wrote on last edited by
                  #13

                  I will be testing it that way, I'm just throwing it out there that if someone has a better idea on how to do this, I'm open to that. When I'm done testing I will report back on how it worked.

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                  • D Dave Kreskowiak

                    Sure, you just have to add Deny permissions to the SYSTEM account to key immediately above what you want to block. I'd open regedit first, try setting this by hand yourself, and then see what happens. You may not be able to reverse what you've done. That being the case, I highly suggest trying this on a virtual machine or a machine you don't care about rebuilding. Since WinLogon is also responsbile for loading the User Profile, you may get the ability to skip the legal screen, but lose the ability to completely login to the machine. You may also never get a shell, and you may lose all network connectivity to off-machine resources, such as network shares, ..., among other things... Do you still think this is a good idea?? I know I wouldn't consider it a supportable solution in an Enterprise environment, or any other environment for that matter.

                    A guide to posting questions on CodeProject[^]
                    Dave Kreskowiak

                    T Offline
                    T Offline
                    turbosupramk3
                    wrote on last edited by
                    #14

                    This did work manually ... I'm having a very difficult time finding information on how to do this programatically though. I haven't found any code examples that do this remotely, and that specify as to which group is the permission change is being done to.

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                    • T turbosupramk3

                      This did work manually ... I'm having a very difficult time finding information on how to do this programatically though. I haven't found any code examples that do this remotely, and that specify as to which group is the permission change is being done to.

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                      turbosupramk3
                      wrote on last edited by
                      #15

                      Ok I finally got this to work programatically, it was quite a pain ... at least for me. If you remove query access and then put it back, it works. It's quite simple I think.

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                      • T turbosupramk3

                        Can I restrict or block access to a specific registry key in HKLM? Or maybe hook it so that another process cannot read it? My goal is to temporarily block/obscure access to an HKLM registry key by the winlogon process, remotely. Thanks!

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                        HaBiX
                        wrote on last edited by
                        #16

                        dunno, but is regedt32.exe not ok?

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