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iOS Frida Configuration

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WhiteIntel

WhiteIntel je dark-web pretraživač koji nudi besplatne funkcionalnosti za proveru da li je kompanija ili njeni korisnici kompromitovani od strane malvera za krađu.

Primarni cilj WhiteIntel-a je borba protiv preuzimanja naloga i napada ransomware-a koji proizilaze iz malvera za krađu informacija.

Možete posetiti njihovu veb lokaciju i isprobati njihovu mašinu za besplatno na:

LogoWhiteIntel

Instalacija Fridda

Koraci za instalaciju Fridda na Jailbroken uređaju:

  1. Otvorite Cydia/Sileo aplikaciju.

  2. Idite na Upravljanje -> Izvori -> Uredi -> Dodaj.

  3. Unesite "https://build.frida.re" kao URL.

  4. Idite na novo dodati izvor Frida.

  5. Instalirajte Frida paket.

Ako koristite Corellium moraćete preuzeti Frida izdanje sa https://github.com/frida/frida/releases (frida-gadget-[yourversion]-ios-universal.dylib.gz) i raspakovati i kopirati na lokaciju dylib-a koju Frida traži, npr.: /Users/[youruser]/.cache/frida/gadget-ios.dylib

Nakon instalacije, možete koristiti na svom računaru komandu frida-ls-devices i proveriti da li se uređaj pojavljuje (vaš računar mora moći da mu pristupi). Takođe izvršite i frida-ps -Uia da biste proverili pokrenute procese telefona.

Frida bez Jailbroken uređaja & bez patch-ovanja aplikacije

Proverite ovaj blog post o tome kako koristiti Fridu na uređajima bez Jailbreak-a bez patch-ovanja aplikacije: https://mrbypass.medium.com/unlocking-potential-exploring-frida-objection-on-non-jailbroken-devices-without-application-ed0367a84f07

Instalacija Frida klijenta

Instalirajte frida alate:

pip install frida-tools
pip install frida

Sa instaliranim Frida serverom i pokrenutim i povezanim uređajem, proverite da li je klijent aktivan:

frida-ls-devices  # List devices
frida-ps -Uia     # Get running processes

Frida Praćenje

# 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 '*[* *]'

Dobijanje svih klasa i metoda

  • Automatsko završavanje: Samo izvršite frida -U <program>

  • Dobijanje svih dostupnih klasa (filtrirano po stringu)

/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.");
}

  • Dobijanje svih metoda jedne klase (filtrirano po stringu)

/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.");
}

  • Pozovi funkciju

// 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

Iz dokumenata: Stalker je Fridin tracing engine. Omogućava praćenje niti, snimanje svake funkcije, svakog bloka, čak i svake instrukcije koja se izvršava.

Imate primer koji implementira Frida Stalker na https://github.com/poxyran/misc/blob/master/frida-stalker-example.py

Ovo je još jedan primer za povezivanje Frida Stalker-a svaki put kada se pozove funkcija:

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
}
});

Ovo je zanimljivo iz razloga debagiranja, ali za fuzzing, stalno koristiti .follow() i .unfollow() je vrlo neefikasno.

Fpicker

fpicker je Frida-based alat za fuzzing koji nudi različite režime fuzzinga za fuzzing unutar procesa, kao što su AFL++ režim ili pasivni režim praćenja. Trebalo bi da radi na svim platformama koje podržava Frida.

# 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

  • Priprema fajl sistema:

# 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 skripta (primjeri/wg-log/mojfuzzer.js):

primjeri/wg-log/mojfuzzer.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;

  • Kompajlirajte fuzzer:

# From inside fpicker clone
## Compile from "myfuzzer.js" to "harness.js"
frida-compile examples/wg-log/myfuzzer.js -o harness.js

  • Pozovite fuzzer fpicker koristeći radamsa:

# 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/

U ovom slučaju ne restartujemo aplikaciju niti vraćamo stanje nakon svakog payload-a. Dakle, ako Frida pronađe pad sistema, sledeći unosi nakon tog payload-a takođe mogu srušiti aplikaciju (jer je aplikacija u nestabilnom stanju), čak i ako unos ne bi trebalo da sruši aplikaciju.

Osim toga, Frida će se zakaciti na signale izuzetaka iOS-a, pa kada Frida pronađe pad sistema, verovatno neće biti generisani izveštaji o padu sistema iOS-a.

Da bismo to sprečili, na primer, mogli bismo ponovo pokrenuti aplikaciju nakon svakog pada sistema Frida.

Logovi & Pada sistema

Možete proveriti macOS konzolu ili log cli da biste proverili macOS logove. Takođe možete proveriti logove sa iOS uređaja koristeći idevicesyslog. Neki logovi će izostaviti informacije dodajući <private>. Da biste videli sve informacije, morate instalirati neki profil sa https://developer.apple.com/bug-reporting/profiles-and-logs/ da biste omogućili te privatne informacije.

Ako ne znate šta da radite:

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

Možete proveriti rušenja u:

  • iOS

  • Postavke → Privatnost → Analitika i unapređenja → Podaci o analitici

  • /private/var/mobile/Library/Logs/CrashReporter/

  • macOS:

  • /Library/Logs/DiagnosticReports/

  • ~/Library/Logs/DiagnosticReports

iOS čuva samo 25 rušenja iste aplikacije, pa ih morate očistiti ili će iOS prestati da pravi rušenja.

Frida Android Tutorijali

pageFrida Tutorial

Reference

WhiteIntel

WhiteIntel je pretraživač pokretan dark webom koji nudi besplatne funkcionalnosti za proveru da li je kompanija ili njeni korisnici ugroženi od malvera koji krade podatke.

Primarni cilj WhiteIntela je borba protiv preuzimanja naloga i napada ransomvera koji proizilaze iz malvera za krađu informacija.

Možete posetiti njihovu veb lokaciju i isprobati njihovu mašinu za pretragu besplatno na:

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