Ray

Ray, the person

Guide you step by step to How to install and run Backtrack on android. As the Backtrack is also available with ARM architecture which makes it possible to run Backtrack on an ARM machine such as mobiles or tablets.

Recently, We are discussed Install and Run BackTrack on Windows. Android is the best OS for penetration testing. It designed for digital forensics and penetration testing or hacking tool. It comes with many more updated tools. As the Backtrack is also available with ARM architecture which makes it possible to run Backtrack on an ARM machine such as mobiles or tablets.

How To Install and Run Backtrack On AndroidRequirements

A Rooted Device [ Root Simple Android Phone Without Pc ]
Backtrack ARM [ Download ]
BusyBox [ Download ]
Android Terminal and Android VNC
If you are using PC then you need 7zip for extraction otherwise you can use zarchiver on your android phone. [ Download ]

Step to Install and Run Backtrack On Android:

First of all extract the BT5-GNOME-ARM.7z. and copy the "BT5" folder and then put in your phone's root directory. Here mine phone is /sdcard. The root directory is different for different mobile devices.

Now install all the above apps Busybox, Android Terminal, Android Vnc.
After installing BusyBox application open it and wait until it finishes loading and then click on Smart install.
Now open the android terminal and type the following command:
su cd /sdcard/BT5sh bootbtNOTE :- When you type su in terminal it will ask you for superuser request and you have to tap on Grant.
After this, type the following commands in terminal.
export USER=rootvncpasswd
After entering vncpasswd the terminal will ask you to enter the password. Enter the desired password and hit enter.
Now type the following commands.
tightvncserver -geometry 1280×720
The terminal emulator will create the localhost to connect it to VNC server. Now note the localhost port marked red below. Now minimize the terminal emulator.
Open the Android VNC and type the following settings.

Nickname : BT5
Password : your password here which you entered in terminal (step no.6)
Address : localhost
Port : 5906

NOTE: Make sure that your localhost's port matches with terminal's localhost. Here mine New 'X' desktop is localhost:6. You may be different. So, in VNC type Port 590X where the "X" is the localhost in the android terminal.

That's it now just tap on connect to run the Backtrack on your android. So in this way you successfully install and run backtrack 5 on android. If you face any problem feel free to discuss in below comments!

In this tutorial series I'm going to walk you through the damn vulnerable web application (DVWA) which is damn vulnerable. Its main goal according to the creators is "to aid security professionals to test thier skills and tools in a legal environment, help web developers better understand the process of securing web applications and to aid both students & teachers to learn about web application security in a controlled class room environment."

I am going to install DVWA in docker so the prerequisite for this tutorial will be an installation of docker (Docker is not the only way to install DVWA but if you have docker already installed then it may be the easiest way to install DVWA).

To install DVWA in docker run your docker deamon if it's not running already and open a terminal or powershell and type:

docker rum --rm -it -p 8080:80 vulnerables/web-dvwa

It will take some time to pull the image from docker hub depending on your internet speed and after it is complete it will start the dvwa application. In the command we have mapped the image instance's port 80 to our hosts port 8080 so we should be able to access the web application from our host at http://localhost:8080

Now open your favorite web browser and go to http://localhost:8080
You should be prompted with a login screen like this:

login with these creds:
username: admin
password: password

After login you'll see a database setup page since this is our first run. Click on Create / Reset Database button at the bottom. It will setup database and redirect you to login page. Now login again and you'll see a welcome page.

Now click on DVWA Security link at the bottom of the page navigation and make sure the security level is set to Low. If it is not click on the dropdown, select Low and then click submit.

Now our setup is complete, so lets try a simple SQL attack to get a taste of whats about to come.

Click on SQL Injection in navigation menu.
You'll be presented with a small form which accepts User ID.
Enter a single quote (') in the User ID input field and click Submit.
You'll see an SQL error like this:

From the error message we can determine that the server has a MariaDB database and we can see the point of injection.
Since there are many quotes we are not able to determine the exact location of our injection. Lets add some text after our single quote to see exactly where our injection point is.
Now I am going to enter 'khan in the User ID field and click Submit.

Now we can see exactly where the point of injection is. Determining the point of injection is very important for a successful SQL injection and is sometimes very hard too, though it might not be that much useful here in this exercise.

Now lets try the very basic SQL Injection attack.
In the User ID field enter ' or 1=1-- - and click Submit.

We will explain what is going on here in the next article.

References:-
1. DVWA Official Website: http://www.dvwa.co.uk/

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Ray, the person

In general decompilers are not friendly with c++ let's analyse a simple program to get familiar with it.
Let's implement a simple code that loads a file into a vector and then save the vector with following functions:

err
load
save
main

Lets identify the typical way in C++ to print to stdout with the operator "<<"

The basic_ostream is initialized writing the word "error" to the cout, and then the operator<< again to add the endl.

The Main function simply calls "vec = load(filename)" but the compiler modified it and passed the vector pointer as a parámeter. Then it bulds and prints "loaded " << size << " users".
And finally saves the vector to /tmp/pwd and print "saved".
Most of the mess is basically the operator "<<" to concat and print values.
Also note that the vectors and strings are automatically deallocated when exit the function.

And here is the code:

Let's take a look to the load function, which iterates the ifs.getline() and push to the vector.
First of all there is a mess on the function definition, __return_storage_ptr is the vector.
the ifstream object ifs is initialized as a basic_ifstream and then operator! checks if it wasn't possible to open the file and in that case calls err()
We see the memset and a loop, getline read a cstr like line from the file, and then is converted to a string before pushing it to the vector. lVar1 is the stack canary value.

In this situations dont obfuscate with the vector pointer vec initialization at the begining, in this case the logic is quite clear.

The function save is a bit more tricky, but it's no more than a vector iteration and ofs writing.
Looping a simple "for (auto s : *vec)" in the decompiler is quite dense, but we can see clearly two write, the second write DAT_0010400b is a "\n"

As we see, save implememtation is quite straightforward.

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Ray

Monday, August 31, 2020

How To Install And Run Backtrack On Android

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Sunday, August 30, 2020

Learning Web Pentesting With DVWA Part 1: Installation

Reversing Some C++ Io Operations

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