Prowler

Distributed Network Vulnerability Scanner

Prowler is a Network Vulnerability Scanner implemented on a Raspberry Pi Cluster, first developed during Singapore Infosec Community Hackathon - HackSmith v1.0.

Why did we build Prowler?

Often, security breaches are not due to hackers breaking through layers of tough security. They happen because someone didn’t change their default passwords.

The Mirai botnet case exploited under-secured IoT devices via easily guessable factory default (or popular) login credentials. This incident, along with many other copycat attempts, led our team wanted to propose a solution to aid users in securing their increasingly connected world.

Enterprises, NGOs and individuals can make use of such a system to catch common security lapses before a security breach occurs.

Capabilities

• Scan a network (a particular subnet or a list of IP addresses) for all IP addresses associated with active network devices
• Determine the type of devices using fingerprinting
• Determine if there are any open ports on the device
• Associate the ports with common services
• Test devices against a dictionary of factory default and common credentials
• Notify users of security vulnerabilities through an dashboard. Dashboard tour

Planned Capabilities

• Greater variety of vulnerability assessment capabilities (webapp etc.)
• Select wordlist based on fingerprint

Hardware

• Raspberry Pi Cluster HAT (with 4 * Pi Zero W)
• Raspberry Pi 3
• Networking device

Software Stack

• Raspbian Stretch (Controller Pi)
• Raspbian Stretch Lite (Worker Pi Zero)
• Note: For ease of setup, use the images provided by Cluster Hat! Instructions
• Python 3 (not tested on Python 2)
• Python packages see requirements.txt
• Ansible for managing the cluster as a whole (/playbooks)

Key Python Packages:

• dispy (website) is the star of the show. It allows allows us to create a job queue that will be processed by the worker nodes.
• python-libnmap is the python wrapper around nmap, an open source network scanner. It allows us to scan for open ports on devices.
• paramiko is a python wrapper around SSH. We use it to probe SSH on devices to test for common credentials.
• eel is used for the web dashboard (seperate repository, here)
• rabbitmq (website) is used to pass the results from the cluster to the eel server that is serving the dashboard page.

Ansible Playbooks

For the playbooks to work, ansible must be installed (sudo pip3 install ansible). Configure the IP addresses of the nodes at /etc/ansible/hosts. WARNING: Your mileage may vary as these were only tested on my setup

• shutdown.yml and reboot.yml self-explanatory
• clone_repos.yml clone prowler and dispy repositories (required!) on the worker nodes
• setup_node.yml installs all required packages on the worker nodes. Does not clone the repositories!

Deploying Prowler

1. Clone the git repository: git clone https://github.com/tlkh/prowler.git
2. Install dependencies by running sudo pip3 install -r requirements.txt on the controller Pi
3. Run ansible-playbook playbooks/setup_node.yml to install the required packages on worker nodes.
4. Clone the prowler and dispy repositories to the worker nodes using ansible-playbook playbooks/clone_repos.yml
5. Run clusterhat on on the controller Pi to ensure that all Pi Zeros are powered up.
6. Run python3 cluster.py on the controller Pi to start Prowler

To edit the range of IP addresses being scanned, edit the following lines in cluster.py:

test_range = []

    for i in range(0, 1):
    
        for j in range(100, 200):
        
            test_range.append("172.22." + str(i) + "." + str(j))

Old Demos

• Cluster Scan Demonstration Jupyter Notebook
• Single Scan Demonstration Jupyter Notebook
• Try out the web dashboard here

Useful Snippets

• To run ssh command on multiple devices, install pssh and pssh -h pssh-hosts -l username -A -i "command"
• To create the cluster (in compute.py): cluster = dispy.JobCluster(compute, nodes='pi0_ip', ip_addr='pi3_ip')
• Check connectivity: ansible all -m ping or ping p1.local -c 1 && ping p2.local -c 1 && ping p3.local -c 1 && ping p4.local -c 1
• Temperature Check: /opt/vc/bin/vcgencmd measure_temp && pssh -h workers -l pi -A -i "/opt/vc/bin/vcgencmd measure_temp" | grep temp
• rpimonitor (how to install):

Contributors:

• Faith See
• Wong Chi Seng
• Timothy Liu

ABSOLUTELY NO WARRANTY WHATSOEVER! Feel free to submit issues though.