Pentest 🔖 Subdomain Enumeration - TLS, CSP, CNAME Probing

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Subdomain Enumeration - TLS, CSP, CNAME Probing

Created for the Hack Tools Dark Community

This method combines several advanced recon techniques to uncover hidden subdomains via TLS certificates, CSP headers, and CNAME records.
Leveraging tools like Cero, httpx, and dnsx, you can significantly expand your reconnaissance surface.

• Tool Used:
  
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• Installation
  

  go install github.com/glebarez/cero@latest

• Usage Examples
  1. TLS Certificate Hunting (with Cero)
     Pull subdomains from Yahoo’s TLS:
     

     cero in.search.yahoo.com | sed 's/^*.//' | grep -e "\." | sort -u

  2. CSP Header Probing (with httpx)
     Extract additional domains from CSP headers:
     

     cat subdomains.txt | httpx -csp-probe -status-code -retries 2 -no-color | anew csp_probed.txt | cut -d ' ' -f1 | unfurl -u domains | anew -q csp_subdomains.txt

  3. CNAME Records (with dnsx)
     Discover CNAME links pointing to other services:
     

     dnsx -retry 3 -cname -l subdomains.txt

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Disclaimer
This content is shared for educational and lawful research only.
Do not use these techniques against systems without proper authorization.
The Hack Tools Dark Community and the author disclaim any responsibility for misuse.
Always operate within the legal boundaries of your jurisdiction.

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