iOS Frida Configuration

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Installing Frida

Hatua za kufunga Frida kwenye kifaa kilichovunjwa:

1. Fungua programu ya Cydia/Sileo.
2. Nenda kwa Manage -> Sources -> Edit -> Add.
3. Ingiza "https://build.frida.re" kama URL.
4. Nenda kwenye chanzo kipya cha Frida kilichoongezwa.
5. Sakinisha pakiti ya Frida.

Ikiwa unatumia Corellium utahitaji kupakua toleo la Frida kutoka https://github.com/frida/frida/releases (frida-gadget-[yourversion]-ios-universal.dylib.gz) na kufungua na nakala kwenye eneo la dylib ambalo Frida inahitaji, e.g.: /Users/[youruser]/.cache/frida/gadget-ios.dylib

Baada ya kusakinishwa, unaweza kutumia kwenye PC yako amri frida-ls-devices na kuangalia kwamba kifaa kinaonekana (PC yako inahitaji kuwa na uwezo wa kukifikia).
Tekeleza pia frida-ps -Uia kuangalia michakato inayofanya kazi kwenye simu.

Frida bila kifaa kilichovunjwa & bila kubadilisha programu

Angalia chapisho hili la blog kuhusu jinsi ya kutumia Frida kwenye vifaa visivyovunjwa bila kubadilisha programu: https://mrbypass.medium.com/unlocking-potential-exploring-frida-objection-on-non-jailbroken-devices-without-application-ed0367a84f07

Frida Client Installation

Sakinisha frida tools:

pip install frida-tools
pip install frida

Na seva ya Frida imewekwa na kifaa kinaendesha na kuunganishwa, angalia ikiwa mteja unafanya kazi:

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

Frida Trace

# 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 '*[* *]'

Pata madarasa na mbinu zote

• Kukamilisha kiotomatiki: Tekeleza tu frida -U <program>

• Pata madarasa yote yanayopatikana (chuja kwa nyenzo)

// 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.")
}

• Pata mbinu zote za darasa (chujio kwa nyuzi)

// 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.")
}

• Piga simu kwa kazi

// 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: Stalker ni injini ya kufuatilia ya Frida. Inaruhusu nyuzi kufuatwa, ikikamata kila kazi, kila kizuizi, hata kila amri inayotekelezwa.

Una mfano unaoonyesha jinsi ya kutekeleza Frida Stalker katika https://github.com/poxyran/misc/blob/master/frida-stalker-example.py

Huu ni mfano mwingine wa kuunganisha Frida Stalker kila wakati kazi inaitwa:

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
},
})

Fpicker

fpicker ni Frida-based fuzzing suite inayotoa aina mbalimbali za fuzzing modes kwa fuzzing ya ndani, kama vile hali ya AFL++ au hali ya kufuatilia isiyo ya moja kwa moja. Inapaswa kufanya kazi kwenye majukwaa yote yanayoungwa mkono na Frida.

• Install fpicker & radamsa

# 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

• Andaa FS:

# 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 script (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

• Kusanya fuzzer:

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

• Piga fuzzer fpicker ukitumia 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/

Logs & Crashes

Unaweza kuangalia macOS console au log cli kuangalia kumbukumbu za macOS.
Unaweza pia kuangalia kumbukumbu kutoka iOS kwa kutumia idevicesyslog.
Kumbukumbu zingine zitaacha habari kwa kuongeza <private>. Ili kuonyesha habari zote unahitaji kufunga profaili kutoka https://developer.apple.com/bug-reporting/profiles-and-logs/ ili kuwezesha hiyo habari ya kibinafsi.

Ikiwa hujui cha kufanya:

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

Unaweza kuangalia ajali katika:

• iOS
• Mipangilio → Faragha → Takwimu na Maboresho → Takwimu za Uchambuzi
• /private/var/mobile/Library/Logs/CrashReporter/
• macOS:
• /Library/Logs/DiagnosticReports/
• ~/Library/Logs/DiagnosticReports

Frida Android Tutorials

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

References

• https://www.briskinfosec.com/blogs/blogsdetail/Getting-Started-with-Frida