AzSubEnum - Azure Service Subdomain Enumeration

AzSubEnum is a specialized subdomain enumeration tool tailored for Azure services. This tool is designed to meticulously search and identify subdomains associated with various Azure services. Through a combination of techniques and queries, AzSubEnum delves into the Azure domain structure, systematically probing and collecting subdomains related to a diverse range of Azure services.

AzSubEnum operates by leveraging DNS resolution techniques and systematic permutation methods to unveil subdomains associated with Azure services such as Azure App Services, Storage Accounts, Azure Databases (including MSSQL, Cosmos DB, and Redis), Key Vaults, CDN, Email, SharePoint, Azure Container Registry, and more. Its functionality extends to comprehensively scanning different Azure service domains to identify associated subdomains.

With this tool, users can conduct thorough subdomain enumeration within Azure environments, aiding security professionals, researchers, and administrators in gaining insights into the expansive landscape of Azure services and their corresponding subdomains.

During my learning journey on Azure AD exploitation, I discovered that the Azure subdomain tool, Invoke-EnumerateAzureSubDomains from NetSPI, was unable to run on my Debian PowerShell. Consequently, I created a crude implementation of that tool in Python.

➜  AzSubEnum git:(main) ✗ python3 azsubenum.py --help
usage: azsubenum.py [-h] -b BASE [-v] [-t THREADS] [-p PERMUTATIONS]

Azure Subdomain Enumeration

options:
  -h, --help            show this help message and exit
  -b BASE, --base BASE  Base name to use
  -v, --verbose         Show verbose output
  -t THREADS, --threads THREADS
                        Number of threads for concurrent execution
  -p PERMUTATIONS, --permutations PERMUTATIONS
                        File containing permutations

Basic enumeration:

python3 azsubenum.py -b retailcorp --thread 10

Using permutation wordlists:

python3 azsubenum.py -b retailcorp --thread 10 --permutation permutations.txt

With verbose output:

python3 azsubenum.py -b retailcorp --thread 10 --permutation permutations.txt --verbose

Nodesub - Command-Line Tool For Finding Subdomains In Bug Bounty Programs

Nodesub is a command-line tool for finding subdomains in bug bounty programs. It supports various subdomain enumeration techniques and provides flexible options for customization.

Features

• Perform subdomain enumeration using CIDR notation (Support input list).
• Perform subdomain enumeration using ASN (Support input list).
• Perform subdomain enumeration using a list of domains.

Installation

To install Nodesub, use the following command:

npm install -g nodesub

NOTE:

• Edit File ~/.config/nodesub/config.ini

Usage

nodesub -h

This will display help for the tool. Here are all the switches it supports.

Columbus-Server - API first subdomain discovery service, blazingly fast subdomain enumeration service with advanced features

Columbus Project is an API first subdomain discovery service, blazingly fast subdomain enumeration service with advanced features.

Columbus returned 638 subdomains of tesla.com in 0.231 sec.

Usage

By default Columbus returns only the subdomains in a JSON string array:

curl 'https://columbus.elmasy.com/lookup/github.com'

But we think of the bash lovers, so if you don't want to mess with JSON and a newline separated list is your wish, then include the Accept: text/plain header.

DOMAIN="github.com"

curl -s -H "Accept: text/plain" "https://columbus.elmasy.com/lookup/$DOMAIN" | \
while read SUB
do
        if [[ "$SUB" == "" ]]
        then
                HOST="$DOMAIN"
        else
                HOST="${SUB}.${DOMAIN}"
        fi
        echo "$HOST"
done

For more, check the features or the API documentation.

Entries

Currently, entries are got from Certificate Transparency.

Command Line

Usage of columbus-server:
  -check
    	Check for updates.
  -config string
    	Path to the config file.
  -version
    	Print version informations.

-check: Check the lates version on GitHub. Prints up-to-date and returns 0 if no update required. Prints the latest tag (eg.: v0.9.1) and returns 1 if new release available. In case of error, prints the error message and returns 2.

Build

git clone https://github.com/elmasy-com/columbus-server
make build

Install

Create a new user:

adduser --system --no-create-home --disabled-login columbus-server

Create a new group:

addgroup --system columbus

Add the new user to the new group:

usermod -aG columbus columbus-server

Copy the binary to /usr/bin/columbus-server.

Make it executable:

chmod +x /usr/bin/columbus-server

Create a directory:

mkdir /etc/columbus

Copy the config file to /etc/columbus/server.conf.

Set the permission to 0600.

chmod -R 0600 /etc/columbus

Set the owner of the config file:

chown -R columbus-server:columbus /etc/columbus

Install the service file (eg.: /etc/systemd/system/columbus-server.service).

cp columbus-server.service /etc/systemd/system/

Reload systemd:

systemctl daemon-reload

Start columbus:

systemctl start columbus-server

If you want to columbus start automatically:

systemctl enable columbus-server