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cloud_enum

Overview

cloud_enum is a multi-cloud OSINT enumeration tool designed to find exposed resources across major cloud providers including AWS, Azure, and Google Cloud Platform (GCP). It enumerates cloud storage buckets, static websites, databases, and other public resources that may have been misconfigured. This tool is essential for security researchers, penetration testers, and bug bounty hunters assessing cloud infrastructure exposure.

Installation

Prerequisites

# Python 3.6+ required
python3 --version

# Required dependencies
pip3 install -r requirements.txt

From GitHub

# Clone the repository
git clone https://github.com/initstring/cloud_enum.git
cd cloud_enum

# Install dependencies
pip3 install -r requirements.txt

# Make executable
chmod +x cloud_enum.py

# Verify installation
python3 cloud_enum.py --help

From Package Manager

# Using pip
pip3 install cloud-enum

# Or clone and install
git clone https://github.com/initstring/cloud_enum
cd cloud_enum
pip3 install .

Basic Usage

CommandDescription
python3 cloud_enum.py -k companyEnumerate based on keyword “company”
python3 cloud_enum.py -k target -b 50Use 50 brute-force threads
python3 cloud_enum.py -k target --disable-awsEnumerate excluding AWS
python3 cloud_enum.py -k target -o results.txtSave results to file
python3 cloud_enum.py -k target -l /path/to/wordlist.txtUse custom wordlist

Core Enumeration Options

Keyword-Based Enumeration

# Basic enumeration with single keyword
python3 cloud_enum.py -k companyname

# Enumeration with multiple keywords
for keyword in company subsidiary division product; do
  python3 cloud_enum.py -k $keyword
done

# Long-running enumeration
python3 cloud_enum.py -k target --threads 100 2>&1 | tee enumeration.log

Thread Control

# Increase threads for faster enumeration (default: 5)
python3 cloud_enum.py -k target -b 50

# Reduce threads for stealth
python3 cloud_enum.py -k target -b 5

# Custom thread configuration
python3 cloud_enum.py -k target --threads 25

AWS Enumeration

S3 Bucket Discovery

# Enumerate AWS S3 buckets
python3 cloud_enum.py -k company --enable-aws

# Check specific S3 bucket patterns
python3 cloud_enum.py -k target
# Results may include: target-bucket, target-data, target-backups

# Verify S3 bucket access
aws s3 ls s3://discovered-bucket/
aws s3api head-bucket --bucket discovered-bucket

AWS Resource Detection

# Enumerate EC2 instances
python3 cloud_enum.py -k target | grep "ec2"

# Look for CloudFront distributions
python3 cloud_enum.py -k target | grep "cloudfront"

# Check for RDS instances
python3 cloud_enum.py -k target | grep "rds"

Azure Enumeration

Blob Storage Discovery

# Enumerate Azure blob storage accounts
python3 cloud_enum.py -k company --enable-azure

# Common Azure patterns found:
# company.blob.core.windows.net
# companydata-blob.core.windows.net
# company-backup.blob.core.windows.net

# Test Azure blob access
curl https://company.blob.core.windows.net/

Azure Subdomain Enumeration

# Check for additional Azure resources
python3 cloud_enum.py -k target | grep "azure"

# Look for Azure App Services
python3 cloud_enum.py -k target | grep "azurewebsites"

# Check for Azure Storage Tables
python3 cloud_enum.py -k target | grep "table.core.windows.net"

Google Cloud Platform Enumeration

GCS Bucket Discovery

# Enumerate Google Cloud Storage buckets
python3 cloud_enum.py -k company --enable-gcp

# Common GCS patterns:
# company-storage
# company-backups
# company-data
# company-logs

# Test GCS bucket access
gsutil ls gs://discovered-bucket/
gsutil ls -L gs://discovered-bucket/

GCP Resource Detection

# Enumerate Firebase instances
python3 cloud_enum.py -k target | grep "firebase"

# Look for Cloud Functions
python3 cloud_enum.py -k target | grep "cloudfunctions"

# Check for Cloud Run services
python3 cloud_enum.py -k target | grep "run.app"

Wordlist Customization

Using Custom Wordlists

# Specify custom wordlist
python3 cloud_enum.py -k target -l custom_words.txt

# Create wordlist from company info
echo "company" > wordlist.txt
echo "companyx" >> wordlist.txt
echo "company-dev" >> wordlist.txt
echo "company-prod" >> wordlist.txt

# Use extended wordlist
python3 cloud_enum.py -k target -l wordlist.txt

Wordlist Generation

# Generate from domain registrations
cat domains.txt | sed 's/\.com//' > base_names.txt

# Add common suffixes
for name in $(cat base_names.txt); do
  echo "$name"
  echo "$name-dev"
  echo "$name-prod"
  echo "$name-data"
  echo "$name-backup"
done > expanded_list.txt

# Use expanded list
python3 cloud_enum.py -k target -l expanded_list.txt

Output and Reporting

Save Results to File

# Basic output to file
python3 cloud_enum.py -k target -o results.txt

# Verbose output with logging
python3 cloud_enum.py -k target -v -o detailed_results.txt 2>&1

# Append to existing results
python3 cloud_enum.py -k newkeyword >> results.txt 2>&1

Parse and Analyze Results

# Extract found resources
grep "Found" results.txt

# Filter by cloud provider
grep "amazon" results.txt
grep "microsoft" results.txt
grep "google" results.txt

# Count findings by type
grep -o "S3\|Blob\|GCS" results.txt | sort | uniq -c

Selective Cloud Provider Enumeration

OptionDescription
--enable-awsEnable AWS enumeration
--enable-azureEnable Azure enumeration
--enable-gcpEnable Google Cloud enumeration
--disable-awsDisable AWS enumeration
--disable-azureDisable Azure enumeration
--disable-gcpDisable GCP enumeration

Targeted Enumeration

# Only AWS enumeration
python3 cloud_enum.py -k target --enable-aws --disable-azure --disable-gcp

# Only Azure enumeration
python3 cloud_enum.py -k target --enable-azure --disable-aws --disable-gcp

# Only GCP enumeration
python3 cloud_enum.py -k target --enable-gcp --disable-aws --disable-azure

Integration with Other Tools

Combining with nslookup

# Verify discovered resources via DNS
while read resource; do
  nslookup "$resource" 2>/dev/null | grep -i "address"
done < results.txt

Piping to curl

# Test HTTP access to discovered resources
grep "cloudfront\|azurewebsites" results.txt | while read url; do
  curl -I "https://$url" 2>/dev/null | head -n 1
done

Integration with Bug Bounty Tools

# Combine with httpx for live checking
python3 cloud_enum.py -k target -o cloud_resources.txt
cat cloud_resources.txt | httpx -o live_cloud_resources.txt

# Combine with nuclei for vulnerability scanning
python3 cloud_enum.py -k target -o resources.txt
nuclei -l resources.txt -t cloud_misconfiguration

Advanced Techniques

Multi-Keyword Enumeration

# Batch enumeration with multiple keywords
cat keywords.txt | while read keyword; do
  python3 cloud_enum.py -k "$keyword" -o "results_$keyword.txt"
  echo "Completed: $keyword"
done

# Merge all results
cat results_*.txt > combined_results.txt

Stealth Enumeration

# Low-frequency enumeration
python3 cloud_enum.py -k target -b 2

# Distributed across time
for i in {1..10}; do
  python3 cloud_enum.py -k "target$i" -b 5
  sleep 300  # Wait 5 minutes between scans
done

Continuous Monitoring

# Schedule regular enumeration
0 0 * * * cd /path/to/cloud_enum && python3 cloud_enum.py -k company -o results_$(date +\%Y\%m\%d).txt

# Compare daily results
diff results_20260430.txt results_20260501.txt

Verification and Validation

Verify Findings

# Test S3 bucket access
aws s3 ls s3://bucket-name/
aws s3api get-bucket-acl --bucket bucket-name

# Test Azure blob access
curl -I "https://account.blob.core.windows.net/container"

# Test GCS bucket access
gsutil ls gs://bucket-name/
gsutil acl ch -u AllUsers:R gs://bucket-name/

Validate Results

# Check for false positives
for resource in $(cat results.txt | grep "Found"); do
  echo "Testing: $resource"
  curl -I "$resource" 2>/dev/null | head -n 1
done

Troubleshooting

Common Issues

IssueSolution
No results foundVerify keyword is relevant; try variations
Slow enumerationIncrease threads with -b flag
Connection errorsCheck internet connection; verify firewall
Rate limitedReduce thread count; add delays

Debugging

# Enable verbose output
python3 cloud_enum.py -k target -v

# Check Python version
python3 --version

# Verify dependencies
pip3 list | grep -E "boto3|azure|google"

# Test cloud connectivity
ping s3.amazonaws.com
ping blob.core.windows.net
ping storage.googleapis.com

Security Considerations

Responsible Disclosure

# Document findings carefully
python3 cloud_enum.py -k target -o findings.txt
# Review before sharing
cat findings.txt

# Calculate impact assessment
grep -c "Found" findings.txt
# Ensure authorization before enumeration
# Document scope and approval
# Follow bug bounty program guidelines
# Report findings responsibly

References

# Official documentation
# https://github.com/initstring/cloud_enum

# View help menu
python3 cloud_enum.py --help

# Check for updates
cd cloud_enum && git pull origin main