M 202: BlueStacks on Mac (15 pts extra)

What You Need for This Project

To get BlueStacks working, a game-oriented Android emulator.

In a Web browser, go here:

Download and install it, as shown below.

You'll need to provide a Google login.

When it's done, you'll see the BlueStacks home page, as shown below. (You won't have the Bank of America app installed yet.)

On your host computer, execute this command:

netstat -an | grep 5555

You should see a LISTENING port on the loopback address, as shown below.

We need to forward that port to the Kali virtual machine with Socat.

On a Mac OS machine, execute these commands to install Homebrew and Socat:

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" brew install socat

On Ubuntu Linux, execute these commands instead:

sudo apt update sudo apt install socat

Execute this command:

socat tcp-listen:5556,reuseaddr,fork tcp:localhost:5555

The terminal freezes, waiting for traffic, as shown below.

Leave this terminal window open.

On your Kali virtual machine, execute this command:

ip addr

Find the IP address of the interface that goes to the host, which is usually "eth0", as highlighted in the image below.

On the host computer, execute ifconfig and find the interface address that's on the same subnet as the Kali machine.

On my host, it was 172.16.123.1, as shown below.

On your Kali virtual machine, execute these commands, replacing the IP address with the correct address of your host system:

apt update apt install android-tools-adb -y adb connect 172.16.123.1:5556 adb devices -l

You see a device attached, as shown below.

Find the text covered by a green box in the image above. That's the flag.

Converted to a CTF 3-1-19
Points labeled "extra" 1-13-2020