hacktricks/mobile-pentesting/ios-pentesting/ios-hooking-with-objection.md

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Para esta sección se va a utilizar la herramienta [**Objection**](https://github.com/sensepost/objection).\
Comienza obteniendo una sesión de objection ejecutando algo como:
```bash
objection -d --gadget "iGoat-Swift" explore
objection -d --gadget "OWASP.iGoat-Swift" explore
```
Puedes ejecutar también `frida-ps -Uia` para verificar los procesos en ejecución del teléfono.

# Enumeración básica de la aplicación

## Rutas locales de la aplicación

*   `env`: Encuentra las rutas donde la aplicación está almacenada dentro del dispositivo

```bash
env

Name               Path
-----------------  -----------------------------------------------------------------------------------------------
BundlePath         /private/var/containers/Bundle/Application/179A6E8B-E7A8-476E-BBE3-B9300F546068/iGoat-Swift.app
CachesDirectory    /var/mobile/Containers/Data/Application/A079DF84-726C-4AEA-A194-805B97B3684A/Library/Caches
DocumentDirectory  /var/mobile/Containers/Data/Application/A079DF84-726C-4AEA-A194-805B97B3684A/Documents
LibraryDirectory   /var/mobile/Containers/Data/Application/A079DF84-726C-4AEA-A194-805B97B3684A/Library
```

## Listar paquetes, frameworks y bibliotecas

*   `ios bundles list_bundles`: Lista los paquetes de la aplicación

```bash
ios bundles list_bundles
Executable    Bundle                Version    Path
------------  --------------------  ---------  -------------------------------------------
iGoat-Swift   OWASP.iGoat-Swift     1.0        ...8-476E-BBE3-B9300F546068/iGoat-Swift.app
AGXMetalA9    com.apple.AGXMetalA9  172.18.4   ...tem/Library/Extensions/AGXMetalA9.bundle
```
*   `ios bundles list_frameworks`: Lista los frameworks externos utilizados por la aplicación

```bash
ios bundles list_frameworks
Executable                      Bundle                                        Version     Path
------------------------------  --------------------------------------------  ----------  -------------------------------------------
ReactCommon                     org.cocoapods.ReactCommon                     0.61.5      ...tle.app/Frameworks/ReactCommon.framework
...vateFrameworks/CoreDuetContext.framework
FBReactNativeSpec               org.cocoapods.FBReactNativeSpec               0.61.5      ...p/Frameworks/FBReactNativeSpec.framework
...ystem/Library/Frameworks/IOKit.framework
RCTAnimation                    org.cocoapods.RCTAnimation                    0.61.5      ...le.app/Frameworks/RCTAnimation.framework
jsinspector                     org.cocoapods.jsinspector                     0.61.5      ...tle.app/Frameworks/jsinspector.framework
DoubleConversion                org.cocoapods.DoubleConversion                1.1.6       ...pp/Frameworks/DoubleConversion.framework
react_native_config             org.cocoapods.react-native-config             0.12.0      ...Frameworks/react_native_config.framework
react_native_netinfo            org.cocoapods.react-native-netinfo            4.4.0       ...rameworks/react_native_netinfo.framework
PureLayout                      org.cocoapods.PureLayout                      3.1.5       ...ttle.app/Frameworks/PureLayout.framework
GoogleUtilities                 org.cocoapods.GoogleUtilities                 6.6.0       ...app/Frameworks/GoogleUtilities.framework
RCTNetwork                      org.cocoapods.RCTNetwork                      0.61.5      ...ttle.app/Frameworks/RCTNetwork.framework
RCTActionSheet                  org.cocoapods.RCTActionSheet                  0.61.5      ....app/Frameworks/RCTActionSheet.framework
react_native_image_editor       org.cocoapods.react-native-image-editor       2.1.0       ...orks/react_native_image_editor.framework
CoreModules                     org.cocoapods.CoreModules                     0.61.5      ...tle.app/Frameworks/CoreModules.framework
RCTVibration                    org.cocoapods.RCTVibration                    0.61.5      ...le.app/Frameworks/RCTVibration.framework
RNGestureHandler                org.cocoapods.RNGestureHandler                1.6.1       ...pp/Frameworks/RNGestureHandler.framework
RNCClipboard                    org.cocoapods.RNCClipboard                    1.5.1       ...le.app/Frameworks/RNCClipboard.framework
react_native_image_picker       org.cocoapods.react-native-image-picker       2.3.4       ...orks/react_native_image_picker.framework
[..]
```
*   `memory list modules`: Lista los módulos cargados en memoria

```bash
memory list modules
Name                                 Base         Size                 Path
-----------------------------------  -----------  -------------------  ------------------------------------------------------------------------------
iGoat-Swift                          0x104ffc000  2326528 (2.2 MiB)    /private/var/containers/Bundle/Application/179A6E8B-E7A8-476E-BBE3-B9300F54...
SubstrateBootstrap.dylib             0x105354000  16384 (16.0 KiB)     /usr/lib/substrate/SubstrateBootstrap.dylib
SystemConfiguration                  0x1aa842000  495616 (484.0 KiB)   /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguratio...
libc++.1.dylib                       0x1bdcfd000  368640 (360.0 KiB)   /usr/lib/libc++.1.dylib
libz.1.dylib                         0x1efd3c000  73728 (72.0 KiB)     /usr/lib/libz.1.dylib
libsqlite3.dylib                     0x1c267f000  1585152 (1.5 MiB)    /usr/lib/libsqlite3.dylib
Foundation                           0x1ab550000  2732032 (2.6 MiB)    /System/Library/Frameworks/Foundation.framework/Foundation
libobjc.A.dylib                      0x1bdc64000  233472 (228.0 KiB)   /usr/lib/libobjc.A.dylib
[...]
```
*   `memory list exports <module_name>`: Exportaciones de un módulo cargado

```bash
memory list exports iGoat-Swift
Type      Name                                                                                                                                    Address
--------  --------------------------------------------------------------------------------------------------------------------------------------  -----------
variable  _mh_execute_header                                                                                                                      0x104ffc000
function  _mdictof                                                                                                                                0x10516cb88
function  _ZN9couchbase6differ10BaseDifferD2Ev                                                                                                    0x10516486c
function  _ZN9couchbase6differ10BaseDifferD1Ev                                                                                                    0x1051648f4
function  _ZN9couchbase6differ10BaseDifferD0Ev                                                                                                    0x1051648f8
function  _ZN9couchbase6differ10BaseDiffer5setupEmm                                                                                               0x10516490c
function  _ZN9couchbase6differ10BaseDiffer11allocStripeEmm                                                                                        0x105164a20
function  _ZN9couchbase6differ10BaseDiffer7computeEmmj                                                                                            0x105164ad8
function  _ZN9couchbase6differ10BaseDiffer7changesEv                                                                                              0x105164de4
function  _ZN9couchbase6differ10BaseDiffer9addChangeENS0_6ChangeE                                                                                 0x105164fa8
function  _ZN9couchbase6differlsERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEERKNS0_6ChangeE                                                   0x1051651d8
function  _ZN9couchbase6differlsERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEERKNS1_6vectorINS0_6ChangeENS1_9allocatorIS8_EEEE                 0x105165280
variable  _ZTSN9couchbase6differ10BaseDifferE                                                                                                     0x1051d94f0
variable  _ZTVN9couchbase6differ10BaseDifferE                                                                                                     0x10523c0a0
variable  _ZTIN9couchbase6differ10BaseDifferE                                                                                                     0x10523c0f8
[..]
```

## Listar clases de una APP

*   `ios hooking list classes`: Lista las clases de la aplicación

```bash
ios hooking list classes

AAAbsintheContext
AAAbsintheSigner
AAAbsintheSignerContextCache
AAAcceptedTermsController
AAAccount
AAAccountManagementUIResponse
AAAccountManager
AAAddEmailUIRequest
AAAppleIDSettingsRequest
AAAppleTVRequest
[...]
```
*   `ios hooking search classes <search_term>`: Busca una clase que contenga una cadena. Puedes **buscar algún término único relacionado con el nombre del paquete principal de la aplicación** para encontrar las clases principales de la aplicación como en el ejemplo:

```bash
ios hooking search classes iGoat
iGoat_Swift.CoreDataHelper
iGoat_Swift.RCreditInfo
iGoat_Swift.SideContainmentSegue
iGoat_Swift.CenterContainmentSegue
iGoat_Swift.KeyStorageServerSideVC
iGoat_Swift.HintVC
iGoat_Swift.BinaryCookiesExerciseVC
iGoat_Swift.ExerciseDemoVC
iGoat_Swift.PlistStorageExerciseViewController
iGoat_Swift.CouchBaseExerciseVC
iGoat_Swift.MemoryManagementVC
[...]
```

## Listar métodos de clase

*   `ios hooking list class_methods`: Lista los métodos de una clase específica

```bash
ios hooking list class_methods iGoat_Swift.RCreditInfo
- cvv
- setCvv:
- setName:
- .cxx_destruct
- name
- cardNumber
- init
- initWithValue:
- setCardNumber:
```
*   `ios hooking search methods <search_term>`: Busca un método que contenga una cadena

```bash
ios hooking search methods cvv
[AMSFinanceVerifyPurchaseResponse + _dialogRequestForCVVFromPayload:verifyType:]
[AMSFinanceVerifyPurchaseResponse - _handleCVVDialogResult:shouldReattempt:]
[AMSFinanceVerifyPurchaseResponse - _runCVVRequestForCode:error:]
[iGoat_Swift.RCreditInfo - cvv]
[iGoat_Swift.RCreditInfo - setCvv:]
[iGoat_Swift.RealmExerciseVC - creditCVVTextField]
[iGoat_Swift.RealmExerciseVC - setCreditCVVTextField:]
[iGoat_Swift.DeviceLogsExerciseVC - cvvTextField]
[iGoat_Swift.DeviceLogsExerciseVC - setCvvTextField:]
[iGoat_Swift.CloudMisconfigurationExerciseVC - cvvTxtField]
[iGoat_Swift.CloudMisconfigurationExerciseVC - setCvvTxtField:]
```

# Hooking Básico

Ahora que has **enumerado las clases y módulos** utilizados por la aplicación, es posible que hayas encontrado algunos **nombres de clase y método interesantes**.

## Enganchar todos los métodos de una clase

*   `ios hooking watch class <class_name>`: Engancha todos los métodos de una clase, volcando todos los parámetros iniciales y retornos

```bash
ios hooking watch class iGoat_Swift.PlistStorageExerciseViewController
```

## Enganchar un solo método

*   `ios hooking watch method "-[<class_name> <method_name>]" --dump-args --dump-return --dump-backtrace`: Engancha un método específico de una clase volcando los parámetros, backtraces y retornos del método cada vez que se llama

```bash
ios hooking watch method "-[iGoat_Swift.BinaryCookiesExerciseVC verifyItemPressed]" --dump-args --dump-backtrace --dump-return
```

## Cambiar el retorno booleano

*   `ios hooking set return_value "-[<class_name> <method_name>]" false`: Esto hará que el método seleccionado devuelva el booleano indicado

```bash
ios hooking set return_value "-[iGoat_Swift.BinaryCookiesExerciseVC verifyItemPressed]" false
```

## Generar plantilla de enganche

*   `ios hooking generate simple <class_name>`:

```bash
ios hooking generate simple iGoat_Swift.RCreditInfo

var target = ObjC.classes.iGoat_Swift.RCreditInfo;

Interceptor.attach(target['+ sharedSchema'].implementation, {
onEnter: function (args) {
console.log('Entering + sharedSchema!');
},
onLeave: function (retval) {
console.log('Leaving + sharedSchema');
},
});


Interceptor.attach(target['+ className'].implementation, {
onEnter: function (args) {
console.log('Entering + className!');
},
onLeave: function (retval) {
console.log('Leaving + className');
},
});


Interceptor.attach(target['- cvv'].implementation, {
onEnter: function (args) {
console.log('Entering - cvv!');
},
onLeave: function (retval) {
console.log('Leaving - cvv');
},
});


Interceptor.attach(target['- setCvv:'].implementation, {
onEnter: function (args) {
console.log('Entering - setCvv:!');
},
onLeave: function (retval) {
console.log('Leaving - setCvv:');
},
});
```