MBCPApp Patcher for MB Bank (Android)

Lightweight AI-free, human-written open source tool for patching MB Bank (Android) app with Flutter framework (v6.4.0+) for rooted users (or ROMs with bulit-in CorePatch). primarily written in Bash, made possible by @cuynu and community in Vietnam.

• If you are looking pre-bulit app, here : MBCP Releases | Install guide
• Project FAQ : Read here
• Licensed as MIT License.

Current situation

• Project is used to almost DEAD, due to MB's measure to modified dex & libraries from the server-side with GW934 error (getSHFiles) when logging in. Luckily, I have a way to bypass the Zimperium check, that's why the project still alive till nowadays with other patches.

• More information about GW934 measure :

- The GW934 error is known enabled from the server-side (v6.4.64 works since days 0, but return with GW934 error after 11 days), it requires client (MBCP/MBBank) app to sent the SHA256 hash of 3 app libraries `libapp.so` | `libmbshield.so` | `libclosestmadagascar.so` and all of 5 dex files (classes1->5.dex) to the server for comparing hash, and if it doesn't match, the server will prevent the app from logging in with GW934 error (MB has detected that your device is not secure for performing transactions. Please uninstall the App and reinstall it from the app store). The other function (eg: DigitalOTP) that works without logging in still works.

Introduction

• Note : "MBCP" / "MBCPApp" = "MBBank CorePatch"
• This project was made to remove or limit annoying features & root detection & accessibility detection that is implemented by the development team of "MB Bank" Android app with additional features such as custom themes ability, device font, etc (see more in patches list). It's not PoC (Proof of Concept) project at all.
• MBCP are closed source before, and many people don't like it and concern with privacy & security issues
• In order to support community and allow other devs to improve the project, I spend days to rewritten MBCP patches in Bash and open source it so you can patch yourself from original app on Linux or Darwin (macOS) environment. All MBCP pre-bulit releases from v6.4.47+ are all bulit with this open source project with the commit ID at the end of the file name.

DISCLAIMER

I'm not responsible if someone abuse this patch to do illegal things, since it's originally made for technical or well-known users only.

Documentation

• MBCPApp Patcher Documentation

Requirements & Usage & How-to use patcher

• Follow usage docs here : Patcher Usage

Patches list :

• Important notice (must read!) :

Important

These patches can be applied for current/newer app version, but the app will refuse to login with GW934 error :

• Remove invoke to mbshield

• Block adjust volume on sEKYC

• Remove new zimperium check

• Hide VTAP root detection activity & dialog

It used to works with v6.4.62 and lower (v6.4.63 up to v6.4.66 with workaround).

Dex and libraries checksum when logging in seems to be added since v6.4.63+, and is likely implemented from the library side.

At the current situation, the workaround for it is still unknown :(

Except for testing, those mentioned patches shouldn't be used for any normal use cases. So for now, avoid it when patching app.

📦 MB Bank : com.mbmobile

⚙️ Patch	📜 Description	🏦 Suggested version
Add verified badge	Replaces the MIC protection shield with verified badge to make it looks more cute :3	v6.4.0 ~ v6.4.84
Adaptive launcher icon	Adds the adaptive & themed icon support to the app. Thanks to @fukiame !	v6.4.0 ~ v6.4.84
Proper notification icon	Temporary fixes for the app notification icon. Thanks to @fukiame !	v6.4.0 ~ v6.4.84
Block adjust volume on sEKYC	Prevent the device volume from being adjusted when entering eKYC activity.	v6.4.0 ~ v6.4.84
Better custom background screen	Replace the preview custom background from awful to useful.	v6.4.84
Change app logo	Change the app logo with set of icons.	v6.4.0 ~ v6.4.84
Change widget background to dark	Change widget background to dark if you use MBBHomeWidget.	v6.4.0 ~ v6.4.83
Force portrait screen	Force the screen always portrait on app, espcially when launching.	v6.4.0 ~ v6.4.84
Remove MB AI Bullsh*t resources	Remove the bullsh*t MB AI resources from app. Need to implement more in the future.	v6.4.74 ~ v6.4.84
Remove MB Themes Store	Remove the MB Themes Store banner from Themes list, preventing access to MB Theme Store.	v6.4.28 ~ v6.4.84
Remove invoke to mbshield	Make app don't invoke to mbshield when opening (MainActivity) and (MBBHomeWidgetQR) only	v6.4.22 ~ v6.4.84
Remove new zimperium check	Remove the new Zimperium (ZDefend) root detection from app. Picked up from Legacy Patch.	v6.4.60 ~ v6.4.84
Remove bulit-in fonts	Remove app font and force to use device font for most app components.	v6.4.0 ~ v6.4.84
Modify app theme	Modify the bulit-in app theme from original one to other themes.	v6.4.30 ~ v6.4.84
Remove garbage permission and activities	Removes tracking permission & activities from app.	v6.4.0 ~ v6.4.84
Revert old eMBee logo	Revert old eMBee logo, especially on product consultation options.	v6.4.53 ~ v6.4.84
Remove useless libraries	Remove the useless libraries from app, only for v6.4.67+	v6.4.67 ~ v6.4.84
Remove animated QR background	Remove the animated QR background from bottom navigation bar and replace with white background.	v6.4.43 ~ v6.4.84
Remove VNPAY VMB20	Remove the VNPAY Airplane related activities.	v6.4.55 ~ v6.4.84
Restore old registration resources	Restore old resources on onboarding page.	v6.4.48 ~ v6.4.84
Hide VTAP root detection activity & dialog	Hide the old root detection screen and dialog showing "Device is rooted" (might have issues with some HyperOS ROMs).	v6.4.0 ~ v6.4.84
Legacy hide VTAP activity & dialog	Hide the first root detection screen with dialog showing "Device is rooted" but not bypassing it. (GW908 will present, unlike standard Hide VTAP root detection activity & dialog patch). Only use for some ugly ROMs which is crashing with standard patch.	v6.4.53 ~ v6.4.84
Remove protection shield	Remove the MIC protection shield on profile picture and login screen. (not app protection)	v6.4.0 ~ v6.4.84
Remove app from launcher	Remove the app icon from launcher, and start with am start or with MBZDefend-Fix Action/Termux.	v6.4.0 ~ v6.4.84
Set targetSdkVersion to 34	Set the targetSdkVersion to 34 (Android 14) to prevent UI issues on some activities.	v6.4.10 ~ v6.4.84
Add modified resources	Adds the specific strings for MBCP on eKYC phases, and modify the DigiBank logo.	v6.4.0 ~ v6.4.84
Add anime resources	Adds anime-related resources to some components inside app.	v6.4.45 ~ v6.4.84

Old patches

Important

These patches are no longer compatible with newer/current app version. It can't be fixed unless MB decompress the libapp.so (which will never happen) or until I find the method to decompress it manually.

📦 MB Bank : com.mbmobile

⚙️ Patch	📜 Description	🏦 Suggested version
Autopatch strings	Modify the strings in-app within libapp.so, and also fixes some translation typo in-app.	v6.4.0 ~ v6.4.66
Bypass GW934 checksum	Bypass the GW934 error rolled-out from MB server-side which prevent MBCP users from logging in to app. Only use this after applied all your patch needs.	v6.4.64 ~ v6.4.66
Disable MB Membership	Disable the MB Membership badge below pfp and all of it's features.	v6.4.0 ~ v6.4.66
Remove custom profile picture	Force the use of default profile picture instead of your current one on MB's server side.	v6.4.0 ~ v6.4.66
Restore old 682 lib	Restore old v6.4.61 libapp.so to prevent enforced quockhanh theme changes on v6.4.62.	v6.4.62
Remove eMBee	Removes eMBee options in app, alongside with Customer support.	v6.4.43 ~ v6.4.66
Remove banner & MiniApp	Removes the banner and MiniApp on homeLanding page when logged in.	v6.4.43 ~ v6.4.66
Remove VPN detection	Remove the VPN detection that warn users to turn it off on app bundle.	v6.4.52 ~ v6.4.66
Spoof app version to v6.4.68	Spoof the app version from v6.4.66 to v6.4.68.	v6.4.64 ~ v6.4.66
Bypass accessibility & malicious apps check	Remove the restriction of using the app when an app using accessibility service or "malicious apps" like (HideMyAppList) installed.	v6.4.25 ~ v6.4.54
Remove new root detection	Remove the new Zimperium (ZDefend) root detection from app. (Now requires workaround for v6.4.56+)	v6.4.15 ~ v6.4.58
Bypass new zimperium detection	Bypass the root check from Zimperium within app.	v6.4.56 ~ v6.4.63

Legacy patches

• These patches are not implemented or outdated, which is used for discontinued MB app version.

📦 MB Bank : com.mbmobile

⚙️ Patch	📜 Description	🏦 Suggested version
Bypass signature check	Not implemented (Use bypass GW934 checksum instead)	v6.4.0 ~ v6.4.21
[TEST] Remove v6.4.56 root detection	New workaround that removes new Zimperium (ZDefend) root detection from app.	v6.4.56
Bypass 1200 error	Workaround for 1200 error that happening on original MB app with specific version, now discontinued.	v6.4.45

Proprietary code

Warning

This project contains some proprietary code extracted from MB's app that has been modified to bypass something in the app, but the modified proprietary code is completely public and open source, it will be used for some patches.

• Proprietary code exists in following folder :

• 1. blob_patches/bypass_apptampering
• 2. blob_patches/noadjust_volume_sekyc
• 3. blob_patches/skip_maintainscreen
• 4. blob_patches/bypass_accessibility_applist
• 5. blob_patches/bypass_rootold
• 6. blob_patches/fix_df16211
• 7. blob_patches/noinvoke

• Under mbsig directory, it contains original signature from original MB's app, which is necessary to make app works after patching process because the app doesn't work with different APK signature.

• Everything including that listed above code are all licensed under MIT license, it can be considered as reverse engineered code :>

Usage

• Go to home directory, then clone repository first

cd ~
git clone https://git.disroot.org/mbcp/mbbpatch.git
cd ~/mbbpatch/MBCPApp

• Since MB Bank are now using split APK (*.apks) since v5.3 (135) so you have to convert it to regular APK first

• Grab MB Bank apks from eMBee APKs or Lotus Chat if you don't have access to Telegram and copy it to ~/mbbpatch/MBCPApp/mbapk

• Run bash mbcpapp.sh script

cd ~/mbbpatch/MBCPApp
./mbcpapp.sh

• Download necessary tools first with Download tools function (otherwise other functions are unlikely to work!)
• Convert apks to apk first using Convert apks to apk function
• Unpack apk with Unpack apk function
• Use Patch App function and select the patches you want to apply to unpacked app except [Bypss GW934 checksum] patch
• When done, apply the [Bypass GW934 checksum] patch, then use Repack APK function to recompile patched app
• Patched app will be MBCP_Flutter_SelfPatched.apk on ~/mbbpatch/MBCPApp/mbcpapp_apk/
• Install it to your device (requires MBCP Helper / CorePatch ) with enabled "Disable digest verify" option.
• Profit :)

TODO

• Bypass the new dex & libraries checksum for MB v6.4.67+ (hardcore challenge)

• Proper display language under Singalarity eKYC phase

• Revert old Bee Rich logo

• Adapt new v6.4.67 zimperium structure

• Adapt new v6.4.68 trungthu theme

Contribute to project

• PRs are welcome, but you are NOT allowed to use any AI-tools for creating PRs with AI-generated/AI-assisted code to this project, even if it's manually reviewed by human. please use your brain and search engine & read documentation for that !

• Even though this project is NOT AI-powered or assisted, another dependencies that the project heavily rely on (APKEditor, coreutils, etc) may have been filled up with AI-generated code or assisted by AI. While I'm straightly disagree it, theres no escape for that in big 2025 (and also in few next years) so we have to live with that AI-generated & AI-assisted code inside the dependencies, but that doesn't mean I will code or allows AI-generated & AI-assisted code in this project at all.

• Remember : Projects that rely on dependencies that is already filled up with AI-generated & AI-assisted code or bulit on top of it but written by human and NOT AI doesn't means the project is AI-powered or AI-generated project.

• If you wish to use AI-tools for contributing, please go ahead and find for another project instead.

Project history

• 05/2023 : MB Bank MOD APK ANDROID project created on Telegram (@mbbmod), providing modified MB Bank APKs since v5.8 with lots of features such as bypassing accessibility check and show a guide to hide root instead of show rooted screen then close the app.

• 01/2024 : Channel from 2023 is deleted, due to Telegram banning account (@cuynutt)

• 06/2024 : [MB Android Patched] channel created, providing modified MB Bank Flutter APKs and then MB React Native APKs

• 01/2025 : Channel renamed to [MBCP Android] due to MB discontinued version that does not requires CorePatch. MBCP Helper also existed since then.

• 05/2025 : Project is rewritten from closed source (mostly with MT Manager) to open source with bash programming language, reduce the trust issues with closed source app before, also allow anyone to patch it manually.

• 06/2025 : [Hide VTAP root detection activity & dialog] patch was added, enables the ability to use the MBCP app with superuser (root permission) enabled.

• 08/2025 : @fukiame joining to refactor the project source code, make it easier to maintain in the future, also implement good logic.

• 10/2025 : MB discontinued v6.4.66, the last version with almost all patches working (except bypass_accessibility_applist) with GW525 error when logging in

• 11/2025 : After multiple times lying myself and always said that I'm not a developer, I embraced and claim myself as a MBCP developer and still having skill issues, but atleast, I made this project, and solved the issues that MB's development team created to the MB Bank app by writing code to bypass them.

• 11/2025 (2) : MB released v6.4.74 with AI-crap button that replaces legacy search button. I created a patch that force replace it back to old search icon.

• ...

Credits

• apktool
• APKEditor
• MT Manager to handle APK signature scheme v2/v3 (in the past)
• Zhaxia CN for sticker packs (Add anime resources)
• FlatIcon for some icons, including search icon, verified badge

Contributors

• Cuynu - dev (im not deserve it) MBCP maintainer
• fukiame - refactor & other improvements
• Ngankbakaa - contributor