# iOS Frida Konfigurasie

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## Installeer Frida

**Stappe om Frida op 'n Jailbroken toestel te installeer:**

1. Maak die Cydia/Sileo app oop.
2. Navigeer na Bestuur -> Bronne -> Wysig -> Voeg by.
3. Voer "https://build.frida.re" in as die URL.
4. Gaan na die nuut bygevoegde Frida bron.
5. Installeer die Frida pakket.

As jy **Corellium** gebruik, sal jy die Frida weergawe van [https://github.com/frida/frida/releases](https://github.com/frida/frida/releases) moet aflaai (`frida-gadget-[yourversion]-ios-universal.dylib.gz`) en uitpak en kopieer na die dylib ligging wat Frida vra, bv.: `/Users/[youruser]/.cache/frida/gadget-ios.dylib`

Na installasie kan jy op jou rekenaar die opdrag **`frida-ls-devices`** gebruik en kyk of die toestel verskyn (jou rekenaar moet toegang daartoe hê).\
Voer ook **`frida-ps -Uia`** uit om die lopende prosesse van die telefoon te kontroleer.

## Frida sonder Jailbroken toestel & sonder om die app te patch

Kyk na hierdie blogpos oor hoe om Frida op nie-jailbroken toestelle te gebruik sonder om die app te patch: [https://mrbypass.medium.com/unlocking-potential-exploring-frida-objection-on-non-jailbroken-devices-without-application-ed0367a84f07](https://mrbypass.medium.com/unlocking-potential-exploring-frida-objection-on-non-jailbroken-devices-without-application-ed0367a84f07)

## Frida Kliënt Installasie

Installeer **frida gereedskap**:
```bash
pip install frida-tools
pip install frida
```
Met die Frida-bediener geïnstalleer en die toestel wat loop en gekonnekteer is, **kontroleer** of die kliënt **werk**:
```bash
frida-ls-devices  # List devices
frida-ps -Uia     # Get running processes
```
## Frida Trace
```bash
# Functions
## Trace all functions with the word "log" in their name
frida-trace -U <program> -i "*log*"
frida-trace -U <program> -i "*log*" | swift demangle # Demangle names

# Objective-C
## Trace all methods of all classes
frida-trace -U <program> -m "*[* *]"

## Trace all methods with the word "authentication" from classes that start with "NE"
frida-trace -U <program> -m "*[NE* *authentication*]"

# Plug-In
## To hook a plugin that is momentarely executed prepare Frida indicating the ID of the Plugin binary
frida-trace -U -W <if-plugin-bin> -m '*[* *]'
```
### Kry alle klasse en metodes

* Outomatiese voltooiing: Voer net `frida -U <program>` uit

<figure><img src="../../.gitbook/assets/image (1159).png" alt=""><figcaption></figcaption></figure>

* Kry **alle** beskikbare **klasse** (filter op string)

{% code title="/tmp/script.js" %}
```javascript
// frida -U <program> -l /tmp/script.js

var filterClass = "filterstring";

if (ObjC.available) {
for (var className in ObjC.classes) {
if (ObjC.classes.hasOwnProperty(className)) {
if (!filterClass || className.includes(filterClass)) {
console.log(className);
}
}
}
} else {
console.log("Objective-C runtime is not available.");
}
```
{% endcode %}

* Kry **alle** **metodes** van 'n **klas** (filter op string)

{% code title="/tmp/script.js" %}
```javascript
// frida -U <program> -l /tmp/script.js

var specificClass = "YourClassName";
var filterMethod = "filtermethod";

if (ObjC.available) {
if (ObjC.classes.hasOwnProperty(specificClass)) {
var methods = ObjC.classes[specificClass].$ownMethods;
for (var i = 0; i < methods.length; i++) {
if (!filterMethod || methods[i].includes(filterClass)) {
console.log(specificClass + ': ' + methods[i]);
}
}
} else {
console.log("Class not found.");
}
} else {
console.log("Objective-C runtime is not available.");
}
```
{% endcode %}

* **Bel 'n funksie**
```javascript
// Find the address of the function to call
const func_addr = Module.findExportByName("<Prog Name>", "<Func Name>");
// Declare the function to call
const func = new NativeFunction(
func_addr,
"void", ["pointer", "pointer", "pointer"], {
});

var arg0 = null;

// In this case to call this function we need to intercept a call to it to copy arg0
Interceptor.attach(wg_log_addr, {
onEnter: function(args) {
arg0 = new NativePointer(args[0]);
}
});

// Wait untill a call to the func occurs
while (! arg0) {
Thread.sleep(1);
console.log("waiting for ptr");
}


var arg1 = Memory.allocUtf8String('arg1');
var txt = Memory.allocUtf8String('Some text for arg2');
wg_log(arg0, arg1, txt);

console.log("loaded");
```
## Frida Fuzzing

### Frida Stalker

[From the docs](https://frida.re/docs/stalker/): Stalker is Frida se kode **opsporing enjin**. Dit laat threads toe om **gevolg** te word, **vang** elke funksie, **elke blok**, selfs elke instruksie wat uitgevoer word.

Jy het 'n voorbeeld wat Frida Stalker implementeer in [https://github.com/poxyran/misc/blob/master/frida-stalker-example.py](https://github.com/poxyran/misc/blob/master/frida-stalker-example.py)

Dit is nog 'n voorbeeld om Frida Stalker aan te sluit elke keer as 'n funksie aangeroep word:
```javascript
console.log("loading");
const wg_log_addr = Module.findExportByName("<Program>", "<function_name>");
const wg_log = new NativeFunction(
wg_log_addr,
"void", ["pointer", "pointer", "pointer"], {
});

Interceptor.attach(wg_log_addr, {
onEnter: function(args) {
console.log(`logging the following message: ${args[2].readCString()}`);

Stalker.follow({
events: {
// only collect coverage for newly encountered blocks
compile: true,
},
onReceive: function (events) {
const bbs = Stalker.parse(events, {
stringify: false,
annotate: false
});
console.log("Stalker trace of write_msg_to_log: \n" + bbs.flat().map(DebugSymbol.fromAddress).join('\n'));
}
});
},
onLeave: function(retval) {
Stalker.unfollow();
Stalker.flush();  // this is important to get all events
}
});
```
{% hint style="danger" %}
Dit is interessant vanuit 'n debug-perspektief, maar vir fuzzing is dit baie ondoeltreffend om konstant **`.follow()`** en **`.unfollow()`** te gebruik.
{% endhint %}

## [Fpicker](https://github.com/ttdennis/fpicker)

[**fpicker**](https://github.com/ttdennis/fpicker) is 'n **Frida-gebaseerde fuzzing suite** wat 'n verskeidenheid fuzzing modi bied vir in-proses fuzzing, soos 'n AFL++ modus of 'n passiewe opsporingsmodus. Dit behoort op alle platforms te werk wat deur Frida ondersteun word.

* [**Installeer fpicker**](https://github.com/ttdennis/fpicker#requirements-and-installation) **& radamsa**
```bash
# Get fpicker
git clone https://github.com/ttdennis/fpicker
cd fpicker

# Get Frida core devkit and prepare fpicker
wget https://github.com/frida/frida/releases/download/16.1.4/frida-core-devkit-16.1.4-[yourOS]-[yourarchitecture].tar.xz
# e.g. https://github.com/frida/frida/releases/download/16.1.4/frida-core-devkit-16.1.4-macos-arm64.tar.xz
tar -xf ./*tar.xz
cp libfrida-core.a libfrida-core-[yourOS].a #libfrida-core-macos.a

# Install fpicker
make fpicker-[yourOS] # fpicker-macos
# This generates ./fpicker

# Install radamsa (fuzzer generator)
brew install radamsa
```
* **Bereid die FS voor:**
```bash
# From inside fpicker clone
mkdir -p examples/wg-log # Where the fuzzing script will be
mkdir -p examples/wg-log/out # For code coverage and crashes
mkdir -p examples/wg-log/in # For starting inputs

# Create at least 1 input for the fuzzer
echo Hello World > examples/wg-log/in/0
```
* **Fuzzer-skrip** (`examples/wg-log/myfuzzer.js`):

{% code title="examples/wg-log/myfuzzer.js" %}
```javascript
// Import the fuzzer base class
import { Fuzzer } from "../../harness/fuzzer.js";

class WGLogFuzzer extends Fuzzer {

constructor() {
console.log("WGLogFuzzer constructor called")

// Get and declare the function we are going to fuzz
var wg_log_addr = Module.findExportByName("<Program name>", "<func name to fuzz>");
var wg_log_func = new NativeFunction(
wg_log_addr,
"void", ["pointer", "pointer", "pointer"], {
});

// Initialize the object
super("<Program nane>", wg_log_addr, wg_log_func);
this.wg_log_addr = wg_log_addr; // We cannot use "this" before calling "super"

console.log("WGLogFuzzer in the middle");

// Prepare the second argument to pass to the fuzz function
this.tag = Memory.allocUtf8String("arg2");

// Get the first argument we need to pass from a call to the functino we want to fuzz
var wg_log_global_ptr = null;
console.log(this.wg_log_addr);
Interceptor.attach(this.wg_log_addr, {
onEnter: function(args) {
console.log("Entering in the function to get the first argument");
wg_log_global_ptr = new NativePointer(args[0]);
}
});

while (! wg_log_global_ptr) {
Thread.sleep(1)
}
this.wg_log_global_ptr = wg_log_global_ptr;
console.log("WGLogFuzzer prepare ended")
}


// This function is called by the fuzzer with the first argument being a pointer into memory
// where the payload is stored and the second the length of the input.
fuzz(payload, len) {
// Get a pointer to payload being a valid C string (with a null byte at the end)
var payload_cstring = payload.readCString(len);
this.payload = Memory.allocUtf8String(payload_cstring);

// Debug and fuzz
this.debug_log(this.payload, len);
// Pass the 2 first arguments we know the function needs and finally the payload to fuzz
this.target_function(this.wg_log_global_ptr, this.tag, this.payload);
}
}

const f = new WGLogFuzzer();
rpc.exports.fuzzer = f;
```
{% endcode %}

* **Kompileer** die fuzzer:
```bash
# From inside fpicker clone
## Compile from "myfuzzer.js" to "harness.js"
frida-compile examples/wg-log/myfuzzer.js -o harness.js
```
* Bel fuzzer **`fpicker`** met **`radamsa`**:

{% code overflow="wrap" %}
```bash
# Indicate fpicker to fuzz a program with the harness.js script and which folders to use
fpicker -v --fuzzer-mode active -e attach -p <Program to fuzz> -D usb -o examples/wg-log/out/ -i examples/wg-log/in/ -f harness.js --standalone-mutator cmd --mutator-command "radamsa"
# You can find code coverage and crashes in examples/wg-log/out/
```
{% endcode %}

{% hint style="danger" %}
In hierdie geval **herstart ons nie die app of herstel die toestand** na elke payload nie. So, as Frida 'n **crash** vind, kan die **volgende insette** na daardie payload ook die **app laat crash** (omdat die app in 'n onstabiele toestand is) selfs al **moet die inset nie die app laat crash** nie.

Boonop sal Frida in uitsondering seine van iOS haak, so wanneer **Frida 'n crash vind**, sal waarskynlik **iOS crash verslae nie gegenereer word** nie.

Om dit te voorkom, kan ons byvoorbeeld die app herstart na elke Frida crash.
{% endhint %}

### Logs & Crashes

Jy kan die **macOS konsole** of die **`log`** cli nagaan om macOS logs te kontroleer.\
Jy kan ook die logs van iOS nagaan met **`idevicesyslog`**.\
Sommige logs sal inligting omseil deur **`<private>`** toe te voeg. Om al die inligting te wys, moet jy 'n profiel van [https://developer.apple.com/bug-reporting/profiles-and-logs/](https://developer.apple.com/bug-reporting/profiles-and-logs/) installeer om daardie private inligting te aktiveer.

As jy nie weet wat om te doen nie:
```sh
vim /Library/Preferences/Logging/com.apple.system.logging.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Enable-Private-Data</key>
<true/>
</dict>
</plist>

killall -9 logd
```
You can check the crashes in:

* **iOS**
* Instellings → Privaatheid → Analise & Verbeterings → Analise Data
* `/private/var/mobile/Library/Logs/CrashReporter/`
* **macOS**:
* `/Library/Logs/DiagnosticReports/`
* `~/Library/Logs/DiagnosticReports`

{% hint style="warning" %}
iOS stoor slegs 25 crashes van dieselfde app, so jy moet dit skoonmaak of iOS sal ophou om crashes te genereer.
{% endhint %}

## Frida Android Tutorials

{% content-ref url="../android-app-pentesting/frida-tutorial/" %}
[frida-tutorial](../android-app-pentesting/frida-tutorial/)
{% endcontent-ref %}

## References

* [https://www.briskinfosec.com/blogs/blogsdetail/Getting-Started-with-Frida](https://www.briskinfosec.com/blogs/blogsdetail/Getting-Started-with-Frida)


{% hint style="success" %}
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</details>
{% endhint %}