--- title: "Installing boot9strap (USM)" --- {% include toc title="Table of Contents" %} {% include text-expand.html %}
Technical Details (optional)

In order to exploit the SAFE_MODE firmware of our system, we need to inject an exploited WiFi profile.

We can do this using an existing exploit, BannerBomb3.

To accomplish this, we use your system's encryption key (movable.sed) to build a DSiWare backup that exploits the system in order to inject the exploited WiFi profile into your connections list.

Once the WiFi profile has been injected, we will use SAFE_MODE, which is a recovery feature present on all 3DS consoles, to activate the exploited WiFi profile.

For a more technical explanation, see the following links for information on the BannerBomb3 and unSAFE_MODE exploits: BannerBomb3, unSAFE_MODE.

### Compatibility Notes These instructions work on USA, Europe, Japan, and Korea region consoles as indicated by the letters U, E, J, or K after the system version. If your (Right/Left Shoulder), (D-Pad Up), or (A) buttons do not work, you will need to follow [an alternate branch of Seedminer](bannerbomb3). For assistance with this matter, join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask, in English, for help. {: .notice--warning} ### What You Need * Your `movable.sed` file from completing [Seedminer](seedminer) * The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/download/v0.0.7/SafeB9SInstaller-20170605-122940.zip) (direct download) * The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/download/1.4/boot9strap-1.4.zip) (direct download) * The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest) (the Luma3DS `.zip` file) #### Section I - Prep Work In this section, you will copy the files needed to trigger the BannerBomb3 and unSAFE_MODE exploits onto your device's SD card. 1. If your device is powered on, power off your device 1. Open [unSAFE_MODE Exploit Injector](https://3ds.nhnarwhal.com/3dstools/unsafemode.php) on your computer 1. Upload your movable.sed using the "Choose File" option 1. Click "Build and Download" + This will download an exploit DSiWare called `F00D43D5.bin` and a SAFE_MODE exploit data file called `usm.bin` inside of a zip archive (`unSAFE_MODE.zip`) 1. Insert your SD card into your computer 1. Copy `boot.firm` and `boot.3dsx` from the Luma3DS `.zip` to the root of your SD card + The root of the SD card refers to the initial directory on your SD card where you can see the Nintendo 3DS folder, but are not inside of it 1. Create a folder named `boot9strap` on the root of your SD card 1. Copy `boot9strap.firm` and `boot9strap.firm.sha` from the boot9strap `.zip` to the `/boot9strap/` folder on your SD card 1. Copy `SafeB9SInstaller.bin` from the SafeB9SInstaller `.zip` to the root of your SD card 1. Copy `usm.bin` from `unSAFE_MODE.zip` to the root of your SD card ![]({{ "/images/screenshots/bb3/usm-root-layout.png" | absolute_url }}){: .notice--info} 1. Navigate to `Nintendo 3DS` -> `` -> `` on your SD card + `` is the 32-letter folder name that you copied in [Seedminer](seedminer) + `` is a 32-letter folder inside of the `` + ![]({{ "/images/screenshots/bb3/dsiware-location-1.png" | absolute_url }}){: .notice--info} 1. Create a folder named `Nintendo DSiWare` inside of the `` + If you already had the folder *and* there are any existing DSiWare backup files (`<8-character-id>.bin`) inside, copy them to your PC and remove them from your SD card 1. Copy the `F00D43D5.bin` file from `unSAFE_MODE.zip` to the `Nintendo DSiWare` folder ![]({{ "/images/screenshots/bb3/dsiware-location-2.png" | absolute_url }}) {: .notice--info} #### Section II - BannerBomb3 In this section, you will trigger the BannerBomb3 exploit using the DSiWare Management menu, which can be used to overwrite your Wi-Fi slots with hacked data. Your Wi-Fi connection settings will be temporarily overwitten while the exploit is active. 1. Reinsert your SD card into your device 1. Power on your device 1. Launch System Settings on your device 1. Navigate to `Data Management` -> `DSiWare`-> `SD Card` ([image](/images/screenshots/bb3/dsiware-management.png)) + Your device should show the [Bannerbomb3 menu](/images/screenshots/bb3/usm-menu.png) + If this step causes your device to crash, [follow this troubleshooting guide](troubleshooting#dsiware-management-menu-crashes-without-showing-usm-menu) 1. Press (A) to select "Inject haxx" + Your device will automatically power off #### Section III - unSAFE_MODE In this section, you will enter Safe Mode (a feature available on all 3DS family devices) and navigate to a menu where unSAFE_MODE will be triggered, which will launch you into the boot9strap (custom firmware) installer. 1. With your device still powered off, hold the following buttons: (Left Shoulder) + (Right Shoulder) + (D-Pad Up) + (A), and while holding these buttons together, power on your device + Keep holding the buttons until the device boots into Safe Mode (a "system update" menu) + If you're unable to get into Safe Mode after multiple attempts, one of your buttons may be failing or broken. If this is the case, you will need to follow [an alternate branch of Seedminer](bannerbomb3). For assistance with this matter, join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask, in English, for help. 1. Press "OK" to accept the update + There is no update. This is part of the exploit 1. Press "I accept" to accept the terms and conditions 1. The update will eventually fail, with the error code `003-1099`. This is intended behaviour 1. When asked "Would you like to configure Internet settings?", select "Yes" 1. On the following menu, navigate to `Connection 1` -> `Change Settings` -> `Next Page (right arrow)` -> `Proxy Settings` -> `Detailed Setup` ([image](/images/screeshots/bb3/safemode_highlighted.png)) 1. If the exploit was successful, your device will have booted into SafeB9SInstaller #### Section IV - Installing boot9strap In this section, you will install custom firmware onto your device. 1. When prompted, input the key combo given on the top screen to install boot9strap + If the top screen is blank, power off your device and re-do Section III 1. Once it is complete, press (A) to reboot your device 1. Your device should have rebooted into the Luma3DS configuration menu + If your device shuts down when you try to power it on, ensure that you have copied `boot.firm` from the Luma3DS `.zip` to the root of your SD card 1. Press (Start) to save and reboot At this point, your console will boot to Luma3DS by default. + Luma3DS does not look any different from the normal HOME Menu. If your console has booted into the HOME Menu, it is running custom firmware. + On the next page, you will install useful homebrew applications to complete your setup. #### Section V - Restoring WiFi Configuration Profiles In this section, you will trigger the BannerBomb3 exploit a second time so that you can restore the Wi-Fi connection slots that were overwritten in Section II. 1. Launch System Settings on your device 1. Navigate to `Data Management` -> `DSiWare`-> `SD Card` ([image](/images/screenshots/bb3/dsiware-management.png)) + Your device should show the [Bannerbomb3 menu](/images/screenshots/bb3/usm-menu.png) 1. Use the D-Pad to navigate and press the (A) button to select "Restore slots" + Your device will automatically reboot 1. Power off your device 1. Insert your SD card into your computer 1. Navigate to `Nintendo 3DS` -> `` -> `` -> `Nintendo DSiWare` on your SD card ![]({{ "/images/screenshots/bb3/dsiware-location-2.png" | absolute_url }}){: .notice--info} 1. Delete `F00D43D5.bin` from your Nintendo DSiWare folder and from your computer. This file will not be needed anymore ___ ### Continue to [Finalizing Setup](finalizing-setup) {: .notice--primary}