Pentesting

Cloud security review

Generic tools

There are several tools that can be used to test different cloud environments. The installation steps and links are going to be indicated in this section.

AWS, Azure, GCP, Alibaba Cloud, Oracle Cloud Infrastructure

pip3 install scoutsuite

cs-suite

AWS, GCP, Azure, DigitalOcean

git clone https://github.com/SecurityFTW/cs-suite.git && cd cs-suite/
pip install virtualenv
virtualenv -p python2.7 venv
source venv/bin/activate
pip install -r requirements.txt
python cs.py --help

Nessus

Nessus has an Audit Cloud Infrastructure scan supporting: AWS, Azure, Office 365, Rackspace, Salesforce. Some extra configurations in Azure are needed to obtain a Client Id.

Common Sense

Take a look to the network access rules and detect if the services are correctly protected:

  • ssh available from everywhere?

  • Unencrypted services running (telnet, http, ...)?

  • Unprotected admin consoles?

  • In general, check that all services are correctly protected depending on their needs

Azure

Access the portal here: http://portal.azure.com/ To start the tests you should have credentials for a Global Reader user.

It is recommended to install azure-cli in a linux and windows virtual machines (to be able to run powershell and python scripts): https://docs.microsoft.com/en-us/cli/azure/install-azure-cli?view=azure-cli-latest Then, run az login to login. Note the account information and token will be saved inside <HOME>/.azure (in both Windows and Linux).

Remember that if the Security Centre Standard Pricing Tier is being used and not the free tier, you can generate a CIS compliance scan report from the azure portal. Go to Policy & Compliance-> Regulatory Compliance (or try to access https://portal.azure.com/#blade/Microsoft_Azure_Security/SecurityMenuBlade/22). If the company is not paying for a Standard account you may need to review the CIS Microsoft Azure Foundations Benchmark by "hand" (you can get some help using the following tools). Download it from here.

Run scanners

Run the scanners to look for vulnerabilities and compare the security measures implemented with CIS.

pip install scout
scout azure --cli --report-dir <output_dir>
#Fix azureaudit.py before launching cs.py
#Adding "j_res = {}" on line 1074
python cs.py -env azure
#Azucar is an Azure security scanner for PowerShell (https://github.com/nccgroup/azucar)
#Run it from its folder
.\Azucar.ps1 -AuthMode Interactive -ForceAuth -ExportTo EXCEL
#Azure-CIS-Scanner,CIS scanner for Azure (https://github.com/kbroughton/azure_cis_scanner)
pip3 install azure-cis-scanner #Install
azscan #Run, login before with `az login`

Attack Graph

Stormspotter creates an “attack graph” of the resources in an Azure subscription. It enables red teams and pentesters to visualize the attack surface and pivot opportunities within a tenant, and supercharges your defenders to quickly orient and prioritize incident response work.

More checks

  • Global Administrators shouldn't be synced from a local AD. Check if Global Administrators emails uses the domain onmicrosoft.com. If not, check the source of the user, the source should be Azure Active Directory, if it comes from Windows Server AD, then report it.

AWS

Get objets in graph: https://github.com/FSecureLABS/awspx