NYOXA LABS

External Attack Surface Assessment

Map public-facing domains, subdomains, cloud assets, portals, APIs, email systems and infrastructure to identify risky exposure.

Engagement deliverables

External asset inventoryRisk-ranked exposure listScreenshots and evidenceAttack surface mapRemediation checklistPriority fix recommendations
Start scope request

Purpose

When this assessment fits

As organizations grow and adopt new cloud technologies, their external footprint inevitably expands, often leading to forgotten subdomains, exposed staging environments, or misconfigured cloud assets. This assessment is essential for organizations that need a clear, hacker-perspective view of what attackers can see from the outside before a breach even begins. By proactively discovering and mapping all public-facing assets, we help you identify shadow IT, eliminate unnecessary exposure, and significantly reduce the likelihood of a successful opportunistic attack.

What we review

  • Domains and subdomains
  • DNS records
  • Public IPs and services
  • Web technologies
  • Public admin panels
  • Staging and development exposure
  • Public storage exposure
  • Exposed API endpoints
  • SSL/TLS configuration
  • Security headers
  • Public data leakage indicators
  • Email/domain security posture

Common risks we help identify

  • Forgotten subdomains or old environments (Shadow IT)
  • Public admin panels accessible without VPN or IP restrictions
  • Exposed development or staging systems containing sensitive data or weak credentials
  • Weak TLS configuration or missing security headers
  • Public cloud storage or misconfigured assets leaking proprietary information
  • Unnecessary services exposed directly to the internet
  • Domain and email configuration weaknesses allowing for brand impersonation

Business value

  • Discover Shadow IT: Uncover forgotten or unmanaged assets that pose a significant, unmonitored risk to the business.
  • Prevent Opportunistic Attacks: Eliminate the low-hanging fruit that automated scanners and opportunistic attackers frequently exploit.
  • Gain Complete Asset Visibility: Establish a comprehensive, accurate inventory of your external digital footprint.
  • Prioritize Remediation Efforts: Focus your security resources on the most critical, highly exposed assets first.

Methodology coverage

NYOXA LABS utilizes advanced OSINT (Open-Source Intelligence) gathering techniques, automated discovery tools, and manual verification to comprehensively map your external attack surface. We identify active subdomains, discover exposed services, analyze public DNS records, and search for indicators of data leakage across public repositories. Crucially, our engineers manually validate findings to eliminate false positives and interpret the true business risk of the exposed assets, providing you with a prioritized, actionable exposure report.

What we need from you

  • Primary domains
  • Known subdomains if available
  • Cloud/provider notes if relevant
  • Written authorization
  • Contact for validation questions

Frequently asked questions

Is this the same as a vulnerability scan?

No. While scanning is used for discovery, the core deliverable is an interpreted exposure report with manual validation, context-aware risk analysis, and prioritized recommendations, rather than just a raw list of scanner outputs.

Can this be done without credentials?

Yes. External attack surface assessments are designed to mimic an unauthenticated attacker and are performed entirely from the public internet perspective without requiring internal credentials.

Ready to scope Attack Surface Assessment?

Request an authorized NYOXA LABS security assessment and get a clear scope, practical deliverables and professional reporting.

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