1. XVMM

    OP XVMM Advanced Member
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    NOTE: This is not an exploit or breakthrough of any sort. It's simply taking advantage of provided debugging features in developer mode! This is for any one who may be curious and want to reverse engineer the Xbox One.

    This is also mainly provided for anyone who wants to just have a go at reversing the system. There's a lot to utilize with the public features anyway.

    Prerequisites:
    - Must be in developer-mode (obviously)
    - Have some form of SSH/telnet client. (PuTTy, etc)
    - At least have Visual Studio 2015 or 2017

    To get started without putting up with developing UWP applications we can instead utilize the open SSH connection provided by the console. This is only available in developer mode, just in case you get any ideas.

    If you're using Windows and will be using standard command prompt for telnet then make sure you enable it first!
    1. Control Panel -> Programs -> Turn Windows features on or off"
    2. Tick "Telnet client"
    3. Done

    First open up whatever client you have for SSH, in this instance PuTTy, and connect using your console IP and default port.
    There'll be a pop-up. Just hit yes.

    Now it will ask for login details. Make sure you have Dev Home opened and hit "Show Visual Studio Pin". Keep note of this pin but also remember it will change after a small period of time!

    Username: DevToolsUser
    Password: The Visual Studio pin provided in Dev Home.

    If all goes successfully then you can either stick with it or intialise telnet. Run the following command in order to do so (ignore quotes):
    "devtoolslauncher LaunchForProfiling telnetd "cmd.exe 24""
    Now you can connect over!
    Open command prompt on Windows and run: telnet [consoleip] 24

    (Example: telnet 192.168.1.5 24)

    The telnet session will be running under the VSProfilingAccount privileges which is the same as what the VS debugger runs under when building UWP apps.

    Keep in mind that there is not too much of a difference at this stage. It just allows a tiny bit more flexability.

    Basic file system exploration:
    You can do this by accessing the Xbox Device Portal on your computer and going to File Explorer tab. There will
    be an option near the top right that is called Browse. Using this will show you credentials that can be used
    to access the developer scratch. We can use the developer scratch to store our junctions to navigate throughout the mounted drives.

    Using telnet or SSH, go to D:\DevelopmentFiles.
    - >D:
    - >cd DevelopmentFiles
    - >mkdir Links

    And run the following:
    - >mklink /J "Links\System" C:\

    If the result is successful then double check:
    - >cd links\system
    - >dir

    If it gives you a directory listing then there you go!

    You can get easier access by opening File Explorer on Windows and typing the following into the file path bar: \\[consoleip

    It will prompt for login details. If you open the device portal and go to File Explorer tab then on right side hit browse; you will be given details to use. Once in then you can access most but not all volumes.

    (Refer to "Mount points" to find out more)

    So what now? Well, I'm going to provide a small "template" which you can use in order to write a standard "Win32" application. The only difference is that it will run on the Xbox One.

    (Requires Windows 10 SDK compatible with Xbox One and probably Visual Studio 2017, at least 2015.)
    XRF: Attached below.
    Place anywhere on the console and run "xrf cinfo" for a basic spit of console info.

    Additional information:
    Basic introduction:
    The Xbox One currently runs 3 separate operating systems with each prioritised with their own purpose.

    These are known as:
    • Host OS
    • System OS
    • Game OS

    System and Game OS both reside in their own partition:
    • Shared Resource Access - Runs apps and renders the UI experience.
    • Exclusive Resource Access - Runs games and has more priority with resources.

    These operations are stored in an Xbox Virtual Disk (XVD) with a small bootloader, currently assumed based on previous data dumps, that contains the kernel, HAL and other important system files. These get stored in the
    User Data section of each.

    • host.xvd | ExtHost.xvd
    • System.xvd
    • era.xvd

    System and Host are stored in both the flash and on the console hard drive. The Game OS XVD is stored with each
    packaged game that is released for the Xbox One. Although this requires another look; it appears that when a user
    launches a game, System then initiates a call that mounts the package to the ERA partition which then boots into the Game OS before finally mounting and starting the game.
    Mount points:
    Within the SRA Partition, the following are mounted to each drive letter:
    \\.\C:\ -> System.xvd
    \\.\D:\ -> USB (typically for retail) (Development scratch for dev-mode)
    \\.\J:\ -> SystemTools.xvd (dev-mode only)
    \\.\L:\ -> en-%s (languages)
    \\.\M:\ -> SystemMisc.xvd
    \\.\P:\ -> Page file
    \\.\S:\ -> Settings.xvd | Settings-devkit.xvd
    \\.\T:\ -> Temp.xvd (or whatever)
    \\.\U:\ -> user.xvd / user-devkit.xvd
    \\.\X:\ -> SystemAux.xvd
    \\.\Y:\ -> SystemAuxF.xvd
     

    Attached Files:

    Last edited by XVMM, Sep 11, 2018
    Frasser, jakibaki, DrakeLyon and 8 others like this.
  2. kingtut

    kingtut GBAtemp Maniac
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    Wait so if I understand you correctly, you can use this template to run win32 apps on xbox one? Can I use this to try and run something like dolphin on xbox one. if so, can you let me know where to start.
     
  3. Gunz4Hire

    Gunz4Hire Member
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    This is very interesting, keep it up!
     
  4. dominater01

    dominater01 GBAtemp Maniac
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    hey kingtut welcome back did you read my message i sent you? i was just curious if you could compile ppsspp again
     
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  5. XVMM

    OP XVMM Advanced Member
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    The template can run console win32 apps, yes. There may not be a way to get any visuals unless you hook and alter the way they handle the window manager. I can't say yes or no since I never looked into the way that worked specifically.
     
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  6. kingtut

    kingtut GBAtemp Maniac
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    Sorry, I missed it. yeah, I can try.

    — Posts automatically merged - Please don't double post! —

    Huh, so what needs to change in the window manager for visuals?
     
  7. XVMM

    OP XVMM Advanced Member
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    Probably the entire thing. Since the OS is a branch from Windows Core / OneCore, I don't think it has anything left for it fully work.
     
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  8. kingtut

    kingtut GBAtemp Maniac
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    Oh ok, awesome job regardless.
     
  9. milkybar1983

    milkybar1983 Member
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    [email protected] D:\DevelopmentFiles>xrf cinfo
    [XRF] Hello!
    Console Revision: Unknown
    Console Flavour: DEVKIT SRA

    xbox one X scorpio edition needs adding to the console revisions @XVMM
     
  10. XVMM

    OP XVMM Advanced Member
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    Was added on the github. I can't link since new here but search for XRF on Github and you'll find it.
     
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  11. milkybar1983

    milkybar1983 Member
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    [XRF] Hello! Console Revision: Scorpio (0x0050) Console Flavour: DEVKIT SRA

    nice thanks
     
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  12. UltiNaruto

    UltiNaruto GBAtemp Regular
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  13. ploggy

    ploggy WAKA! WAKA!
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    Huh, GliGli is involved with this too? I saw on another site that he was one of the people working on this? If so thats good.. He was one of the guys who first hacked the 360 :)
     
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  14. wiired24

    wiired24 Developer
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    Th
    Things are getting interesting again in this scene ^_^
     
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  15. ploggy

    ploggy WAKA! WAKA!
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    I hope so. Xbox scene is in real need of a kick up the ass ;P
     
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  16. wiired24

    wiired24 Developer
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    I could be totally wrong but my line of thinking is maybe if win32 can be loaded perhaps this could lead to running some arbitrary exploit code that could allow for serious homebrew :)
     
  17. ploggy

    ploggy WAKA! WAKA!
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    That would be great. We'll just have to play the waiting game now. :)
     
  18. XVMM

    OP XVMM Advanced Member
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    Yup!
     
  19. Pickle_Rick

    Pickle_Rick I'm a pickle Morty!
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    Yeah, like I said in your thread, it might be possible to pwn dev mode with a Windows 10 exploit.
     
  20. rommy667

    rommy667 GBAtemp Advanced Fan
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    Awesome stuff cant wait to see how this grows :)
     
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