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https://github.com/aktsk/ipa-medit

Memory modification tool for re-signed ipa supports iOS apps running on iPhone and Apple Silicon Mac without jailbreaking.
https://github.com/aktsk/ipa-medit

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Memory modification tool for re-signed ipa supports iOS apps running on iPhone and Apple Silicon Mac without jailbreaking.

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README 

        
# ipa-medit



[![GitHub release](https://img.shields.io/github/v/release/aktsk/ipa-medit.svg)](https://github.com/aktsk/ipa-medit/releases/latest)

[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/aktsk/ipa-medit/blob/main/LICENSE)

[![](https://img.shields.io/badge/Black%20Hat%20Arsenal-USA%202021-blue.svg)](https://www.blackhat.com/us-21/arsenal/schedule/index.html#ipa-medit-memory-search-and-patch-tool-for-ipa-without-jailbreaking-24072)

![](https://github.com/aktsk/ipa-medit/actions/workflows/test.yml/badge.svg?branch=main)



Ipa-medit is a memory search and patch tool for resigned ipa without jailbreaking. 

It supports iOS apps running on iPhone and Apple Silicon Mac.

It was created for mobile game security testing.

Many mobile games have jailbreak detection, but ipa-medit does not require jailbreaking, so memory modification can be done without bypassing the jailbreak detection.



## Motivation

Memory modification is the easiest way to cheat in games, it is one of the items to be checked in the security test.

There are also cheat tools that can be used casually like GameGem and iGameGuardian.

However, there were no tools available for un-jailbroken device and CUI, Apple Silicon Mac.

So I made it as a security testing tool.

Android version is [aktsk/apk-medit](https://github.com/aktsk/apk-medit).



## Demo




## Requirements

- macOS

  - You need to have a valid iOS Development certificate installed.

- Only when targeting iOS apps running on an iPhone.

  - Xcode

  - [libimobiledevice/libimobiledevice](https://github.com/libimobiledevice/libimobiledevice)

  - [libimobiledevice/ideviceinstaller](https://github.com/libimobiledevice/ideviceinstaller)



```

$ brew install --HEAD libplist

$ brew install --HEAD usbmuxd

$ brew install --HEAD libimobiledevice

$ brew install --HEAD ideviceinstaller

```



## Installation

### Binary(Intell Mac Only)

Download the binary from [GitHub Releases](https://github.com/aktsk/ipa-medit/releases/) and drop it in your $PATH.



### Manually Build

You can build it by using the make command.

Go compiler is required to build.

If you are targeting an iOS app that runs on an Apple Silicon Mac, you will need to sign it, but `script/codesign.sh` will be executed and signed automatically.



```

$ git clone [email protected]:aktsk/ipa-medit.git

$ cd ipa-medit

$ make build

```



## Usage



The target .ipa file must be signed with a certificate installed on your computer. 

If you want to modify memory on third-party applications, please use a tool such as [ipautil](https://github.com/aktsk/ipautil) for re-signing.



```

$ ipautil decode tap1000000.ipa # unzip

$ ipautil build Payload         # re-sign and generate .ipa file

```



### Targeting the iOS app on iPhone



To launch it, you need to specify the executable file path contained in the .ipa file with `-bin` and the bundle id with `-id`.



```

$ unzip tap1000000.ipa

$ ipa-medit -bin="./Payload/tap1000000.app/tap1000000" -id="jp.hoge.tap1000000"

```



### Targeting the iOS app on Apple Silicon Mac



To launch it, you need to specify the process name with `-name` or the pid with `-pid`. 

The process name and pid of the iOS app can be checked in the Activity Monitor.



```

$ ipa-medit -name 

```



### Commands

Here are the commands available in an interactive prompt.



#### find

Search the specified integer on memory.



```

> find 999986

Success to halt process

Scanning: 0x00000001025e4000-0x00000001025e8000

Scanning: 0x00000001025f4000-0x00000001025fc000

Scanning: 0x0000000102604000-0x0000000102608000

....

Scanning: 0x000000016eb34000-0x000000016ebbc000

Scanning: 0x000000016ebc0000-0x000000016ebe8000

Scanning: 0x000000016ebec000-0x000000016ec74000

Scanning: 0x000000016ec78000-0x000000016ed00000

Found: 1!!

Address: 0x10a2feea0

```



By default, only integers are searched when targeting iOS apps running on iPhone, because the LLDB API is slow.

When targeting an iOS app running on Apple Silicon Mac, strings will also be searched.



You can also specify datatype such as string, word, dword, qword.



```

> find dword 999994

Search Double Word...

Target Value: 999994([58 66 15 0])

Found: 1!!

Address: 0x11378aea0

```



#### filter

Filter previous search results that match the current search results.



```

> filter 999842

Success to halt process

Found: 1!!

Address: 0x1087beea0

```



#### patch

Write the specified value on the address found by search.



```

> patch 10

Successfully patched!

```



#### attach

Attach to the target process.



```

> attach

Success to halt process

```



#### detach

Detach from the attached process.



```

> detach

Success to continue process

```



#### ps

Get information about the target process.

It will only work if you are targeting an iOS app running on an iPhone.



```

> ps

SBProcess: pid = 926, state = running, threads = 37, executable = tap1000000

State: Running

thread #1: tid = 0x545ee, 0x00000001bd6552d0 libsystem_kernel.dylib`mach_msg_trap + 8, queue = 'com.apple.main-thread'

thread #3: tid = 0x54619, 0x00000001bd67a184 libsystem_kernel.dylib`__workq_kernreturn + 8

thread #4: tid = 0x5461a, 0x00000001bd67a184 libsystem_kernel.dylib`__workq_kernreturn + 8

thread #5: tid = 0x5461b, 0x00000001bd67a184 libsystem_kernel.dylib`__workq_kernreturn + 8

thread #6: tid = 0x5461c, 0x00000001bd67a184 libsystem_kernel.dylib`__workq_kernreturn + 8

thread #7: tid = 0x5461d, 0x00000001bd6552d0 libsystem_kernel.dylib`mach_msg_trap + 8, name = 'com.apple.uikit.eventfetch-thread'

thread #8: tid = 0x5461e, 0x00000001bd6791ac libsystem_kernel.dylib`__psynch_cvwait + 8, name = 'GC Finalizer'

thread #9: tid = 0x5461f, 0x00000001bd65530c libsystem_kernel.dylib`semaphore_wait_trap + 8, name = 'Job.Worker 0'

thread #10: tid = 0x54620, 0x00000001bd65530c libsystem_kernel.dylib`semaphore_wait_trap + 8, name = 'Job.Worker 1'

thread #11: tid = 0x54621, 0x00000001bd65530c libsystem_kernel.dylib`semaphore_wait_trap + 8, name = 'Job.Worker 2'

...

thread #35: tid = 0x54659, 0x00000001bd6552d0 libsystem_kernel.dylib`mach_msg_trap + 8, name = 'AURemoteIO::IOThread'

thread #36: tid = 0x54662, 0x00000001bd679814 libsystem_kernel.dylib`__semwait_signal + 8

thread #37: tid = 0x54663, 0x00000001bd6552d0 libsystem_kernel.dylib`mach_msg_trap + 8, name = 'com.apple.CoreMotion.MotionThread'

thread #38: tid = 0x54664, 0x00000001bd65530c libsystem_kernel.dylib`semaphore_wait_trap + 8, name = 'Loading.PreloadManager'

```



#### exit

To exit medit, use the `exit` command or `Ctrl-D`.



```

> exit

Bye!

```



## Trouble shooting

### Failed to get reply to handshake packet

If you get the error `/private/var/containers/Bundle/Application/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX/hoge.app: error: failed to get reply to handshake packet` and can't communicate properly with iOS device and lldb, launch Xcode and build some app, and it will work.



### Could not connect to lockdownd

If you get the error `Could not connect to lockdownd.` and can't communicate properly with iOS device and ideviceinstaller, launch Xcode and build some app, and it will work.

If this does not solve the problem, please update ideviceinstaller and libimobiledevice to the latest versions using the example of commands in the Requirements section.



### Could not start com.apple.debugserver

This can be fixed by installing the latest unversioned code of libimobiledevice and ideviceinstaller by adding the `--HEAD` option when doing `brew install`.



- Reference: [Could not start com.apple.debugserver! ios 14.1 xcode 12.2 MacOS 10.15.4 iphone12 · Issue #1104 · libimobiledevice/libimobiledevice](https://github.com/libimobiledevice/libimobiledevice/issues/1104)



## License

MIT License