# 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-vrystelling 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`

Nadat dit geïnstalleer is, 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 in 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 tools**:
```bash
pip install frida-tools
pip install frida
```
Met die Frida-bediener geïnstalleer en die toestel wat loop en gekoppel 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="../../images/image (1159).png" alt=""><figcaption></figcaption></figure>

- Kry **alle** beskikbare **klasse** (filter op string)
```javascript:/tmp/script.js
// 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.")
}
```
- Kry **alle** **metodes** van 'n **klas** (filter op string)
```javascript:/tmp/script.js
// 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.")
}
```
- **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
},
})
```
> [!CAUTION]
> Dit is interessant vanuit 'n foutopsporingsoogpunt, maar vir fuzzing is dit om konstant **`.follow()`** en **`.unfollow()`** te gebruik, baie ondoeltreffend.

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

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

- [**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`):
```javascript:examples/wg-log/myfuzzer.js
// 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
```
- **Compile** die fuzzer:
```bash
# From inside fpicker clone
## Compile from "myfuzzer.js" to "harness.js"
frida-compile examples/wg-log/myfuzzer.js -o harness.js
```
- Roep fuzzer **`fpicker`** aan met **`radamsa`**:
```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/
```
> [!CAUTION]
> In hierdie geval **herbegin ons nie die aansoek of herstel die toestand** na elke payload nie. So, as Frida 'n **crash** vind, kan die **volgende insette** na daardie payload ook die **aansoek laat crash** (omdat die aansoek in 'n onstabiele toestand is) selfs al **moet die inset nie die aansoek laat crash** nie.
>
> Boonop sal Frida in die uitsondering seine van iOS inhaak, so wanneer **Frida 'n crash vind**, sal waarskynlik **iOS crash verslae nie gegenereer word** nie.
>
> Om dit te voorkom, kan ons byvoorbeeld die aansoek herbegin na elke Frida crash.

### 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 weglat deur **`<private>`** by 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
```
Jy kan die crashes nagaan in:

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

> [!WARNING]
> iOS stoor slegs 25 crashes van dieselfde app, so jy moet dit skoonmaak of iOS sal ophou om crashes te skep.

## Frida Android Tutorials

{{#ref}}
../android-app-pentesting/frida-tutorial/
{{#endref}}

## References

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


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