appdecrypt

Decrypt application's encrypted binaries on macOS when SIP-enabled (macOS 11.2.3 or below). Even if it can decrypt all applications, some iOS apps won't be possible to run on the mac, even after decryption.

This works well and compiles for iOS nicely, if you want use it at iOS devices, you can use build-ios.sh (Thanks @dlevi309).

How to use

On mac with M1 CPU

> git clone https://github.com/paradiseduo/appdecrypt.git
> cd appdecrypt
> chmod +x build-macOS_arm.sh
> ./build-macOS_arm.sh
> ./appdecrypt
Version 2.1

appdecrypt is a tool to make decrypt application encrypted binaries on macOS when SIP-enabled.

Examples:
    mac:
        appdecrypt /Application/Test.app /Users/admin/Desktop/Test.app
    iPhone:
        appdecrypt /var/containers/Bundle/Application/XXXXXX /tmp

USAGE: appdecrypt encryptMachO_Path decryptMachO_Path

ARGUMENTS:
  <encryptApp_Path>     The encrypt app file path.
  <decrypt_Path>        The path output file.

OPTIONS:
  -h, --help              Show help information.
  --ignore-ios-check      Decrypt the app even if M1 can't run it.

For Example

> ./appdecrypt /Applicaiton/Test.app /Users/admin/Desktop/Test.app
Success to copy file.
Dump /Applications/Test.app/Wrapper/Test.app/Test Success
Dump /Applications/Test.app/Wrapper/Test.app/PlugIns/TestNotificationService.appex/TestNotificationService Success
Dump /Applications/Test.app/Wrapper/Test.app/Frameworks/trackerSDK.framework/trackerSDK Success
Dump /Applications/Test.app/Wrapper/Test.app/Frameworks/AgoraRtcKit.framework/AgoraRtcKit Success
> cd /Users/admin/Desktop/Test.app
> ls
WrappedBundle Wrapper
> cd Wrapper
> ls
BundleMetadata.plist Test.app            iTunesMetadata.plist

On Jailbreak iPhone with arm64 CPU

First you should connect jailbreak iPhone with USB.

> brew install ldid
> git clone https://github.com/paradiseduo/appdecrypt.git
> cd appdecrypt
> chmod +x build-iOS.sh
> ./build-iOS.sh
> scp -P 2222 appdecrypt root@127.0.0.1:/tmp

// In iPhone shell
> cd /tmp
> ./appdecrypt
Version 2.1

appdecrypt is a tool to make decrypt application encrypted binaries on macOS when SIP-enabled.

Examples:
    mac:
        appdecrypt /Applicaiton/Test.app /Users/admin/Desktop/Test.app
    iPhone:
        appdecrypt /var/containers/Bundle/Application/XXXXXX /tmp

USAGE: appdecrypt encryptMachO_Path decryptMachO_Path

ARGUMENTS:
  <encryptApp_Path>     The encrypt app file path.
  <decrypt_Path>        The path output file.

OPTIONS:
  -h, --help              Show help information.

For Example

// In iPhone shell
> ./appdecrypt /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E /tmp
Success to copy file.
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/KingsRaid Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/FBSDKGamingServicesKit.framework/FBSDKGamingServicesKit Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/FBLPromises.framework/FBLPromises Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/FBSDKShareKit.framework/FBSDKShareKit Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/GoogleUtilities.framework/GoogleUtilities Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/FBSDKLoginKit.framework/FBSDKLoginKit Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/nanopb.framework/nanopb Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/FBSDKCoreKit.framework/FBSDKCoreKit Success
Dump /var/containers/Bundle/Application/5B5D4E97-E760-4AC5-BFEE-F0FF72EBB19E/KingsRaid.app/Frameworks/Protobuf.framework/Protobuf Success
> cd Payload
> ls
BundleMetadata.plist  KingsRaid.app/  iTunesMetadata.plist
> tar -cvf /tmp/dump.tar ./

// In mac shell
> cd ~/Desktop
> scp -P 2222 root@127.0.0.1:/tmp/dump.tar .
dump.tar

Principle

This was discovered independently when analyzing kernel sources, but it appears that the technique was first introduced on iOS :

https://github.com/JohnCoates/flexdecrypt

but now works on macOS:

https://github.com/meme/apple-tools/tree/master/foulplay

LICENSE

This software is released under the GPL-3.0 license.

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