Mafunzo ya Frida
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Ufungaji
Sakinisha frida tools:
pip install frida-tools
pip install frida
Pakua na sakinisha kwenye Android frida server (Download the latest release).\
Mstari mmoja wa kuanzisha adb tena kwa root mode, kujiunga nayo, kupakia frida-server, kumpa ruhusa za utekelezaji na kuiendesha kwa background:
adb root; adb connect localhost:6000; sleep 1; adb push frida-server /data/local/tmp/; adb shell "chmod 755 /data/local/tmp/frida-server"; adb shell "/data/local/tmp/frida-server &"
Angalia ikiwa inafanya kazi:
frida-ps -U #List packages and processes
frida-ps -U | grep -i <part_of_the_package_name> #Get all the package name
Frida server vs. Gadget (root vs. no-root)
Njia mbili za kawaida za ku-instrument programu za Android kwa kutumia Frida:
- Frida server (rooted devices): Tuma na endesha daemon asilia inayokuruhusu kuambatisha kwenye mchakato wowote.
- Frida Gadget (no root): Weka Frida kama shared library ndani ya APK na ipakie kiotomatiki ndani ya mchakato lengwa.
Frida server (rooted)
# Download the matching frida-server binary for your device's arch
# https://github.com/frida/frida/releases
adb root
adb push frida-server-<ver>-android-<arch> /data/local/tmp/frida-server
adb shell chmod 755 /data/local/tmp/frida-server
adb shell /data/local/tmp/frida-server & # run at boot via init/magisk if desired
# From host, list processes and attach
frida-ps -Uai
frida -U -n com.example.app
Frida Gadget (no-root)
- Tenganisha APK, ongeza gadget .so na config:
- Weka libfrida-gadget.so ndani ya lib// (kwa mfano, lib/arm64-v8a/)
- Unda assets/frida-gadget.config na mipangilio yako ya upakiaji wa script
Mfano wa frida-gadget.config
{
"interaction": { "type": "script", "path": "/sdcard/ssl-bypass.js" },
"runtime": { "logFile": "/sdcard/frida-gadget.log" }
}
- Taja/pakia gadget ili ianzishwe mapema:
- Rahisi zaidi: Ongeza stub ndogo ya Java kwa System.loadLibrary("frida-gadget") katika Application.onCreate(), au tumia upakiaji wa maktaba za native uliopo tayari.
- Repack na saini APK, kisha sakinisha:
apktool d app.apk -o app_m
# ... add gadget .so and config ...
apktool b app_m -o app_gadget.apk
uber-apk-signer -a app_gadget.apk -o out_signed
adb install -r out_signed/app_gadget-aligned-debugSigned.apk
- Unganisha kutoka host hadi gadget process:
frida-ps -Uai
frida -U -n com.example.app
Vidokezo
- Gadget inatambuliwa na baadhi ya kinga; tunza majina/paths kwa utulivu na zipakwe mwishoni/kwa masharti ikiwa inahitajika.
- Kwa apps zilizo hardened, pendelea rooted testing na server + late attach, au unganisha na Magisk/Zygisk hiding.
Mafunzo
Mafunzo 1
From: https://medium.com/infosec-adventures/introduction-to-frida-5a3f51595ca1
APK: https://github.com/t0thkr1s/frida-demo/releases
Source Code: https://github.com/t0thkr1s/frida-demo
Fuata kiungo ili kusoma.
Tutorial 2
From: https://11x256.github.io/Frida-hooking-android-part-2/ (Parts 2, 3 & 4)
APKs and Source code: https://github.com/11x256/frida-android-examples
Fuata kiungo ili kusoma.
Tutorial 3
From: https://joshspicer.com/android-frida-1
APK: https://github.com/OWASP/owasp-mstg/blob/master/Crackmes/Android/Level_01/UnCrackable-Level1.apk
Fuata kiungo ili kusoma.
You can find more Awesome Frida scripts here: https://codeshare.frida.re/
Quick Examples
Kuitisha Frida kutoka command line
frida-ps -U
#Basic frida hooking
frida -l disableRoot.js -f owasp.mstg.uncrackable1
#Hooking before starting the app
frida -U --no-pause -l disableRoot.js -f owasp.mstg.uncrackable1
#The --no-pause and -f options allow the app to be spawned automatically,
#frozen so that the instrumentation can occur, and the automatically
#continue execution with our modified code.
Skripti ya Msingi ya Python
import frida, sys
jscode = open(sys.argv[0]).read()
process = frida.get_usb_device().attach('infosecadventures.fridademo')
script = process.create_script(jscode)
print('[ * ] Running Frida Demo application')
script.load()
sys.stdin.read()
Hooking functions without parameters
Hook the function a() ya class sg.vantagepoint.a.c
Java.perform(function () {
; rootcheck1.a.overload().implementation = function() {
rootcheck1.a.overload().implementation = function() {
send("sg.vantagepoint.a.c.a()Z Root check 1 HIT! su.exists()");
return false;
};
});
Hook java exit()
var sysexit = Java.use("java.lang.System")
sysexit.exit.overload("int").implementation = function (var_0) {
send("java.lang.System.exit(I)V // We avoid exiting the application :)")
}
Hook MainActivity .onStart() na .onCreate()
var mainactivity = Java.use("sg.vantagepoint.uncrackable1.MainActivity")
mainactivity.onStart.overload().implementation = function () {
send("MainActivity.onStart() HIT!!!")
var ret = this.onStart.overload().call(this)
}
mainactivity.onCreate.overload("android.os.Bundle").implementation = function (
var_0
) {
send("MainActivity.onCreate() HIT!!!")
var ret = this.onCreate.overload("android.os.Bundle").call(this, var_0)
}
Hook android .onCreate()
var activity = Java.use("android.app.Activity")
activity.onCreate.overload("android.os.Bundle").implementation = function (
var_0
) {
send("Activity HIT!!!")
var ret = this.onCreate.overload("android.os.Bundle").call(this, var_0)
}
Hooking functions na vigezo na kupata thamani
Hooking function ya decryption. Chapisha ingizo, ita function ya asili ili ku-decrypt ingizo na hatimaye, chapisha data ya wazi:
function getString(data) {
var ret = ""
for (var i = 0; i < data.length; i++) {
ret += data[i].toString()
}
return ret
}
var aes_decrypt = Java.use("sg.vantagepoint.a.a")
aes_decrypt.a.overload("[B", "[B").implementation = function (var_0, var_1) {
send("sg.vantagepoint.a.a.a([B[B)[B doFinal(enc) // AES/ECB/PKCS7Padding")
send("Key : " + getString(var_0))
send("Encrypted : " + getString(var_1))
var ret = this.a.overload("[B", "[B").call(this, var_0, var_1)
send("Decrypted : " + ret)
var flag = ""
for (var i = 0; i < ret.length; i++) {
flag += String.fromCharCode(ret[i])
}
send("Decrypted flag: " + flag)
return ret //[B
}
Hooking functions na kuwaita na pembejeo zetu
Hook function inayopokea string na uite kwa string tofauti (kutoka here)
var string_class = Java.use("java.lang.String") // get a JS wrapper for java's String class
my_class.fun.overload("java.lang.String").implementation = function (x) {
//hooking the new function
var my_string = string_class.$new("My TeSt String#####") //creating a new String by using `new` operator
console.log("Original arg: " + x)
var ret = this.fun(my_string) // calling the original function with the new String, and putting its return value in ret variable
console.log("Return value: " + ret)
return ret
}
Kupata object iliyoundwa tayari ya darasa
Ikiwa unataka kutoa sifa fulani ya object iliyoundwa unaweza kutumia hii.
Katika mfano huu utaona jinsi ya kupata object ya darasa my_activity na jinsi ya kuita function .secret() ambayo itachapisha sifa binafsi ya object:
Java.choose("com.example.a11x256.frida_test.my_activity", {
onMatch: function (instance) {
//This function will be called for every instance found by frida
console.log("Found instance: " + instance)
console.log("Result of secret func: " + instance.secret())
},
onComplete: function () {},
})
Mafunzo mengine ya Frida
- https://github.com/DERE-ad2001/Frida-Labs
- Part 1 of Advanced Frida Usage blog series: IOS Encryption Libraries
Marejeleo
- Build a Repeatable Android Bug Bounty Lab: Emulator vs Magisk, Burp, Frida, and Medusa
- Frida Gadget documentation
- Frida releases (server binaries)
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