Security Workshop

This workshop is inspired from Complete Ethical Hacking Bootcamp 2021: Zero to Mastery.

Learn Ethical Hacking + Penetration Testing! Use real techniques by black hat hackers then learn to defend against them!

Presentation PDF: https://drive.google.com/file/d/1INQJDxII_ktZ9v7_7kUisWQCjjjt-QfK/view?usp=sharing

Requirements

• VirtualBox
• Metasploitable

Installation

• Kali Linux VirtualBox 64-Bit (OVA)

Double click on the kali-linux-2021.1-vbox-amd64.ova file, this should open VirtualBox and create your first virtual machine. You can keep the default options.

• metasploitable3#quick-start

Follow the quick-start instructions that correspond to your operating system. For simplicity, we'll use the prebuit images.

Configuration

VirtualBox

In order to enable the communication between your virtual machines we'll configure a NAT Network.

Virtual Box >> Preferences... >> Network >> [+] Adds new NAT network >> OK

Kali Linux

Kali-Linux-2021.1-vbox-amd64 >> Settings >> Network >> Attached to: NAT Network >> OK

Click on the Show button, on the login screen enter the following credentials:

login: kali
password: kali

⚠️ The q key on a azerty keyboard corresponds to the a key on a qwerty keyboard.

From a terminal, you can now change the keyboard to azerty if you're using a French keyboard

$ setxkbmap fr
$ sudo dpkg-reconfigure keyboard-configuration

Choose the following options:

• Generic 105-key (Intl) PC
• Other
• French
• The default for the keyboard layout
• No compose key

To retrieve the IP address of the machine use the following command:

$ ip -4 addr
...
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    inet 10.0.2.4/24 brd 10.0.2.255 scope global dynamic

Metasploitable 3

Metasploitable3-ub1404 >> Settings >> Network >> Attached to: NAT Network

You might also want to increase the display scale factor:

Settings >> Display >> Scale Factor: 300% >> OK

Once this is done you can click on the Show button

metasploitable3-ub1404 login: vagrant
password: vagrant

Configure the keyboard in French if needed:

$ sudo loadkeys fr
$ sudo dpkg-reconfigure keyboard-configuration

Choose the following options:

• Generic 105-key (Intl) PC
• French
• French
• The default for the keyboard layout
• No compose key

As previously, to retrieve the IP address of the machine use the following command:

$ ip -4 addr
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0

You are ready to take up the challenge, head over to the Wiki 💻

SSH (Optionnal)

If you are using a Windows 10 machine, please check if the OpenSSH client is installed. To do so, please follow the Microsoft's instructions located here.

Then, you can configure port-forwarding (only required over NAT Network) in order to access to access remotly to the virtual machine terminal using your host machine.

Virtual Box >> Preferences... >> Network >> NatNetwork >> Port Forwarding

Name	Protocol	Host IP	Host Port	Guest IP	Guest Port
SSH Kali	TCP	127.0.0.1	2522	10.0.2.4	22
SSH Ubuntu	TCP	127.0.0.1	2523	10.0.2.15	22
SSH Windows	TCP	127.0.0.1	2524	10.0.2.5	22

Open Kali Linux and access to the terminal

$ sudo systemctl start ssh.socket
$ sudo systemctl enable ssh.socket

Open a terminal of your HOST machine:

Kali Linux

$ ssh -p 2522 [email protected]

Metasploit

$ ssh -p 2523 [email protected]

Windows

$ ssh -p 2524 [email protected]

In order to avoid having to type the password for each SSH connection you can register your host machine as a trusted machine with Kali Linux and Metasploitable.

1. Open a terminal (Powershell on Windows) and generate a new SSH keypair using the ssh-keygen command:

$ ssh-keygen

The program will ask you for a passphrase and a location where to save the new key. Using the suggested default path is recommended because all other tools will look for it there.

2. Copy your public key to Kali Linux and Ubuntu machines:

Windows instructions

> type $env:USERPROFILE\.ssh\id_rsa.pub | ssh -p 2522 [email protected] "cat >> .ssh/authorized_keys"

> type $env:USERPROFILE\.ssh\id_rsa.pub | ssh -p 2523 [email protected] "cat >> .ssh/authorized_keys"

Mac instructions

$ ssh-copy-id -i ~/.ssh/id_rsa.pub -p 2522 [email protected]

$ ssh-copy-id -i ~/.ssh/id_rsa.pub -p 2523 [email protected]

SSH Config (Optionnal)

Create aliases for hosts so that ssh -p 2522 [email protected] becomes ssh kali.

# filename: .ssh/config

Host kali
    User kali
    HostName 127.0.0.1
    Port 2522

Host ubuntu
    User vagrant
    HostName 127.0.0.1
    Port 2523

Host windows
    User vagrant
    HostName 127.0.0.1
    Port 2524

Host (Optionnal)

As we will often use IP addresses of machines through the workshop, you can also configure the hosts file to use aliases on the Kali Linux machine.

$ ssh -p 2522 [email protected]
$ sudo vim /etc/hosts

Add these two lines to the file

10.0.2.15       ubuntu
10.0.2.5        windows