🌐 Infrastructure Enumeration

[!TIP] Domain and infrastructure information is more than subdomains. Map the full internet presence. Include certificates, DNS, cloud resources, and third-party services.

Certificate Transparency (crt.sh)

Certificate Transparency  logs let you verify issued digital certificates. These logs are a strong source for subdomain discovery.

Extract Unique Subdomains

curl -s "https://crt.sh/?q=target.com&output=json" | jq -r '.[].name_value' | sed 's/\*\.//g' | sort -u

Resolve Subdomains to IPs

# Generate subdomain list first, then:
for i in $(cat subdomainlist); do 
    host $i | grep "has address" | cut -d" " -f1,4
done

Feed IPs to Shodan

# Save IPs to file
for i in $(cat subdomainlist); do 
    host $i | grep "has address" | cut -d" " -f4 >> ip-addresses.txt
done
 
# Query Shodan for each IP
for i in $(cat ip-addresses.txt); do 
    shodan host $i
done

📋 DNS Records

DNS records show important infrastructure details about the target.

dig ANY target.com

TXT Record Security Components

☁️ Cloud Resources

[!WARNING] Cloud provider infrastructure security is not the same as a secure company configuration. Misconfigurations are common.

Common Cloud Storage

Google Dorks for Cloud Discovery

# AWS S3 Buckets
intext:companyname inurl:amazonaws.com
intext:companyname inurl:s3.amazonaws.com
site:s3.amazonaws.com "companyname"

# Azure Blobs
intext:companyname inurl:blob.core.windows.net
site:blob.core.windows.net "companyname"

# GCP Storage
intext:companyname inurl:storage.googleapis.com

Specialized Tools

🔍 Additional Reconnaissance

Target Website Source Code

• View source for hardcoded endpoints, API keys, and S3 URLs.
• Check JavaScript files for API endpoints.
• Look for development and staging URLs in comments.

# Extract URLs from page source
curl -s https://target.com | grep -oP 'https?://[^"]+' | sort -u
 
# Find JS files and check for secrets
curl -s https://target.com | grep -oE 'src="[^"]*.js"' | cut -d'"' -f2

Useful OSINT Resources

#cpts #recon #osint #infrastructure #cloud #dns