# Frida Tutorial 3
{% hint style="success" %}
Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\
Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
Support HackTricks
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
{% endhint %}
**Dica de bug bounty**: **inscreva-se** no **Intigriti**, uma plataforma premium de **bug bounty criada por hackers, para hackers**! Junte-se a nós em [**https://go.intigriti.com/hacktricks**](https://go.intigriti.com/hacktricks) hoje e comece a ganhar recompensas de até **$100,000**!
{% embed url="https://go.intigriti.com/hacktricks" %}
***
**Este é um resumo do post**: [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)\
**APK**: [https://github.com/OWASP/owasp-mstg/blob/master/Crackmes/Android/Level\_01/UnCrackable-Level1.apk](https://github.com/OWASP/owasp-mstg/blob/master/Crackmes/Android/Level\_01/UnCrackable-Level1.apk)
## Solução 1
Baseado em [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)
**Hook a função \_exit()**\_ e **função de descriptografia** para que imprima a flag no console do frida quando você pressionar verificar:
```javascript
Java.perform(function () {
send("Starting hooks OWASP uncrackable1...");
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 : " + getString(ret));
var flag = "";
for (var i=0; i < ret.length; i++){
flag += String.fromCharCode(ret[i]);
}
send("Decrypted flag: " + flag);
return ret; //[B
};
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 :)");
};
send("Hooks installed.");
});
```
## Solução 2
Baseado em [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)
**Hook rootchecks** e função de descriptografia para que imprima a flag no console do frida quando você pressionar verificar:
```javascript
Java.perform(function () {
send("Starting hooks OWASP uncrackable1...");
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 : " + getString(ret));
var flag = "";
for (var i=0; i < ret.length; i++){
flag += String.fromCharCode(ret[i]);
}
send("Decrypted flag: " + flag);
return ret; //[B
};
var rootcheck1 = Java.use("sg.vantagepoint.a.c");
rootcheck1.a.overload().implementation = function() {
send("sg.vantagepoint.a.c.a()Z Root check 1 HIT! su.exists()");
return false;
};
var rootcheck2 = Java.use("sg.vantagepoint.a.c");
rootcheck2.b.overload().implementation = function() {
send("sg.vantagepoint.a.c.b()Z Root check 2 HIT! test-keys");
return false;
};
var rootcheck3 = Java.use("sg.vantagepoint.a.c");
rootcheck3.c.overload().implementation = function() {
send("sg.vantagepoint.a.c.c()Z Root check 3 HIT! Root packages");
return false;
};
var debugcheck = Java.use("sg.vantagepoint.a.b");
debugcheck.a.overload("android.content.Context").implementation = function(var_0) {
send("sg.vantagepoint.a.b.a(Landroid/content/Context;)Z Debug check HIT! ");
return false;
};
send("Hooks installed.");
});
```
**Dica de bug bounty**: **inscreva-se** na **Intigriti**, uma plataforma premium de **bug bounty criada por hackers, para hackers**! Junte-se a nós em [**https://go.intigriti.com/hacktricks**](https://go.intigriti.com/hacktricks) hoje e comece a ganhar recompensas de até **$100,000**!
{% embed url="https://go.intigriti.com/hacktricks" %}
{% hint style="success" %}
Aprenda e pratique Hacking AWS:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\
Aprenda e pratique Hacking GCP: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
Support HackTricks
* Confira os [**planos de assinatura**](https://github.com/sponsors/carlospolop)!
* **Junte-se ao** 💬 [**grupo do Discord**](https://discord.gg/hRep4RUj7f) ou ao [**grupo do telegram**](https://t.me/peass) ou **siga**-nos no **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Compartilhe truques de hacking enviando PRs para os repositórios do** [**HackTricks**](https://github.com/carlospolop/hacktricks) e [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud).
{% endhint %}
[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)
[**HackTricks Training GCP Red Team Expert (GRTE)**