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https://github.com/carlospolop/hacktricks
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151 lines
6.6 KiB
Markdown
151 lines
6.6 KiB
Markdown
# Frida Tutorial 3
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<details>
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<summary><strong>Learn AWS hacking from zero to hero with</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
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Other ways to support HackTricks:
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* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-L_2uGJGU7AVNRcqRvEi%2Fuploads%2FwdlXOpyZOVGNzyhOiiFK%2Fimage%20(1).png?alt=media&token=13f4d279-7d3f-47ce-a68e-35f9a906973f" alt=""><figcaption></figcaption></figure>
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If you are interested in **hacking career** and hack the unhackable - **we are hiring!** (_fluent polish written and spoken required_).
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{% embed url="https://www.stmcyber.com/careers" %}
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***
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**This is a summary of the post**: [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)\
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**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)
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## Solution 1
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Based in [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)
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**Hook the \_exit()**\_ function and **decrypt function** so it print the flag in frida console when you press verify:
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```javascript
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Java.perform(function () {
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send("Starting hooks OWASP uncrackable1...");
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function getString(data){
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var ret = "";
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for (var i=0; i < data.length; i++){
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ret += "#" + data[i].toString();
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}
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return ret
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}
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var aes_decrypt = Java.use("sg.vantagepoint.a.a");
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aes_decrypt.a.overload("[B","[B").implementation = function(var_0,var_1) {
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send("sg.vantagepoint.a.a.a([B[B)[B doFinal(enc) // AES/ECB/PKCS7Padding");
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send("Key : " + getString(var_0));
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send("Encrypted : " + getString(var_1));
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var ret = this.a.overload("[B","[B").call(this,var_0,var_1);
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send("Decrypted : " + getString(ret));
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var flag = "";
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for (var i=0; i < ret.length; i++){
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flag += String.fromCharCode(ret[i]);
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}
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send("Decrypted flag: " + flag);
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return ret; //[B
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};
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var sysexit = Java.use("java.lang.System");
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sysexit.exit.overload("int").implementation = function(var_0) {
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send("java.lang.System.exit(I)V // We avoid exiting the application :)");
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};
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send("Hooks installed.");
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});
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```
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## Solution 2
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Based in [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)
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**Hook rootchecks** and decrypt function so it print the flag in frida console when you press verify:
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```javascript
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Java.perform(function () {
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send("Starting hooks OWASP uncrackable1...");
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function getString(data){
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var ret = "";
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for (var i=0; i < data.length; i++){
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ret += "#" + data[i].toString();
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}
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return ret
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}
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var aes_decrypt = Java.use("sg.vantagepoint.a.a");
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aes_decrypt.a.overload("[B","[B").implementation = function(var_0,var_1) {
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send("sg.vantagepoint.a.a.a([B[B)[B doFinal(enc) // AES/ECB/PKCS7Padding");
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send("Key : " + getString(var_0));
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send("Encrypted : " + getString(var_1));
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var ret = this.a.overload("[B","[B").call(this,var_0,var_1);
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send("Decrypted : " + getString(ret));
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var flag = "";
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for (var i=0; i < ret.length; i++){
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flag += String.fromCharCode(ret[i]);
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}
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send("Decrypted flag: " + flag);
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return ret; //[B
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};
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var rootcheck1 = Java.use("sg.vantagepoint.a.c");
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rootcheck1.a.overload().implementation = function() {
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send("sg.vantagepoint.a.c.a()Z Root check 1 HIT! su.exists()");
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return false;
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};
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var rootcheck2 = Java.use("sg.vantagepoint.a.c");
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rootcheck2.b.overload().implementation = function() {
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send("sg.vantagepoint.a.c.b()Z Root check 2 HIT! test-keys");
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return false;
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};
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var rootcheck3 = Java.use("sg.vantagepoint.a.c");
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rootcheck3.c.overload().implementation = function() {
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send("sg.vantagepoint.a.c.c()Z Root check 3 HIT! Root packages");
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return false;
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};
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var debugcheck = Java.use("sg.vantagepoint.a.b");
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debugcheck.a.overload("android.content.Context").implementation = function(var_0) {
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send("sg.vantagepoint.a.b.a(Landroid/content/Context;)Z Debug check HIT! ");
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return false;
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};
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send("Hooks installed.");
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});
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```
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<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-L_2uGJGU7AVNRcqRvEi%2Fuploads%2FwdlXOpyZOVGNzyhOiiFK%2Fimage%20(1).png?alt=media&token=13f4d279-7d3f-47ce-a68e-35f9a906973f" alt=""><figcaption></figcaption></figure>
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If you are interested in **hacking career** and hack the unhackable - **we are hiring!** (_fluent polish written and spoken required_).
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{% embed url="https://www.stmcyber.com/careers" %}
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<details>
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<summary><strong>Learn AWS hacking from zero to hero with</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
|
||
|
||
Other ways to support HackTricks:
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||
* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
||
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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