External Attack Surface Management

See What Attackers See with Attack Surface Monitoring

Discover your unknown assets, exposed services, and misconfigurations before attackers do. Continuous monitoring of your external attack surface across cloud, on-premise, and hybrid environments.

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Continuous Discovery
Multi-Cloud Coverage
Real-Time Alerts
The Reality

Why Attack Surface

You can't protect what you don't know exists. Shadow IT, cloud sprawl, and forgotten assets create blind spots attackers exploit.

69%
of breaches involve unknown assets
30%
of assets are shadow IT
15min
for attackers to find exposures
80%
have unknown cloud assets
The Challenge

Attack Surface Challenges Organizations Face

Traditional security approaches assume you know all your assets. Modern environments make that assumption dangerous.

Shadow IT

Developers spin up cloud resources, marketing launches microsites, acquisitions bring unknown systems. You can't inventory what you don't know exists.

Discovery

Multi-Cloud Sprawl

AWS, Azure, GCP, and dozens of SaaS apps. Each has its own security model, misconfigurations, and exposed resources.

Cloud SaaS

Forgotten Assets

Legacy systems, test environments, and decommissioned servers remain online, unpatched, and vulnerable.

Legacy Cleanup

Subdomain Takeover

Dangling DNS records point to deprovisioned services. Attackers claim them and host malicious content on your domain.

DNS Domains

SSL/TLS Issues

Expired certificates, weak ciphers, and misconfigured TLS create security gaps and compliance issues.

Certificates

IAM Misconfigurations

Overprivileged accounts, stale credentials, and exposed API keys in cloud environments enable unauthorized access.

IAM Cloud

Container Security

Kubernetes clusters with exposed dashboards, default configurations, and vulnerable container images.

K8s Containers

Exposed Databases

Elasticsearch, MongoDB, and Redis instances exposed to the internet with no authentication.

Data Storage

Change Velocity

Cloud infrastructure changes constantly. Point-in-time assessments are outdated before they're delivered.

Continuous
Your Advantage

Benefits of Attack

Complete visibility into your external footprint enables proactive defense and informed risk decisions.

Complete Asset Inventory

Discover all internet-facing assets including shadow IT, cloud resources, and acquired infrastructure.

For Security Teams

Automated discovery across IP ranges, domains, and cloud accounts

For Executives

Know exactly what you're protecting and where the gaps are

Continuous Monitoring

Real-time detection of new assets, changes, and exposures as your environment evolves.

For Security Teams

Immediate alerts on new exposures and configuration changes

For Executives

Security keeps pace with business and development velocity

Prioritized Risks

Focus on what matters with risk-based prioritization that considers exploitability and business impact.

For Security Teams

Actionable findings ranked by actual risk, not CVSS alone

For Executives

Security resources focused on highest-impact issues

Multi-Cloud Visibility

Unified view across AWS, Azure, GCP, and on-premise infrastructure.

For Security Teams

Single pane of glass for hybrid and multi-cloud environments

For Executives

Consistent security posture regardless of where workloads run

Attacker's Perspective

See your organization the way external attackers do—before they find your weaknesses.

For Security Teams

Outside-in view reveals what's actually reachable

For Executives

Validate that defenses work as expected

Compliance Support

Demonstrate continuous security monitoring for NIS2, ISO 27001, PCI-DSS, and SOC 2.

For Security Teams

Evidence of continuous monitoring and remediation

For Executives

Meet regulatory requirements with documented proof

Our Capabilities

Attack Surface Monitoring Services

Comprehensive coverage across your entire external attack surface—from DNS to cloud to containers.

24/7 Continuous Scanning
1000+ Detection Rules
🎯 Risk-Prioritized

Domain & Subdomain Discovery

Enumerate all domains, subdomains, and DNS records associated with your organization.

Certificate transparency DNS enumeration Passive reconnaissance Subdomain brute-force

IP & Network Discovery

Map all IP addresses, ranges, and autonomous systems linked to your organization.

WHOIS lookup BGP analysis Reverse DNS ASN mapping

Cloud Asset Discovery

Identify cloud resources across AWS, Azure, GCP, and other providers.

S3 buckets Azure blobs Cloud functions Storage accounts

Third-Party Integration

Discover SaaS applications, CDNs, and external services connected to your infrastructure.

SaaS inventory CDN detection API endpoints OAuth connections

All monitoring integrates with your existing security tools via API and webhook. Request your assessment →

Our Approach

Monitoring

A structured approach to discovering, monitoring, and securing your external attack surface.

01
Day 1

Scope Definition

Define the boundaries of your attack surface—domains, IP ranges, cloud accounts, and organizational context.

Domain inventory IP range definition Cloud account access Brand/subsidiary mapping Acquisition history Integration planning
02
Week 1

Initial Discovery

Comprehensive reconnaissance to build your complete asset inventory from an attacker's perspective.

Passive reconnaissance Active enumeration Cloud discovery Certificate transparency DNS analysis Service fingerprinting
03
Week 1-2

Exposure Analysis

Assess discovered assets for vulnerabilities, misconfigurations, and security gaps.

Vulnerability scanning Misconfiguration check Exposed services Data exposure Certificate issues Cloud posture
04
Week 2

Risk Prioritization

Rank findings by actual risk considering exploitability, business impact, and threat intelligence.

Risk scoring Business context Exploit availability Threat correlation Priority matrix Remediation roadmap
05
Ongoing

Continuous Monitoring

Ongoing monitoring for new assets, changes, and emerging exposures.

24/7 monitoring Change detection New asset alerts Vulnerability updates Certificate expiry Configuration drift
06
Continuous

Reporting & Integration

Actionable reporting and integration with your security operations and remediation workflows.

Real-time alerts Weekly digests Executive reports API integration Ticket creation Trend analysis
What You Receive

Monitoring Deliverables

Complete visibility into your attack surface with actionable insights and continuous updates.

Asset Inventory

Complete inventory of internet-facing assets with ownership and classification.

  • Domains
  • IPs
  • cloud resources
  • services
  • technologies
  • ownership mapping

Real-Time Alerts

Immediate notification when critical exposures are detected.

  • New vulnerabilities
  • configuration changes
  • new assets
  • certificate issues

Risk Assessment Report

Prioritized findings with business context and remediation guidance.

  • Risk ranking
  • exploitability
  • impact analysis
  • remediation steps

Trend Analysis

Track attack surface changes and risk evolution over time.

  • Historical data
  • trend charts
  • metric tracking
  • improvement measurement

Cloud Security Report

Detailed assessment of cloud security posture across providers.

  • CIS benchmark compliance
  • IAM review
  • storage security
  • network exposure

Container Security Report

Kubernetes and container security assessment findings.

  • Cluster security
  • image vulnerabilities
  • RBAC issues
  • network policies

Certificate Report

Complete SSL/TLS certificate inventory with expiration tracking.

  • Expiration calendar
  • cipher analysis
  • chain validation
  • renewal alerts

DNS Security Report

DNS configuration assessment and takeover risk analysis.

  • Record inventory
  • DNSSEC status
  • takeover risks
  • email security

Executive Dashboard

High-level view of attack surface health for leadership.

  • Risk scores
  • trends
  • peer comparison
  • compliance status

Monitoring Platform

Self-service access to your attack surface data and findings.

  • Asset browser
  • finding details
  • historical data
  • export capabilities

API Access

Programmatic access for integration with security tools.

  • REST API
  • webhooks
  • SIEM integration
  • ticketing automation

Monthly Reviews

Regular review meetings to discuss findings and priorities.

  • Trend review
  • new findings
  • remediation progress
  • roadmap updates
attack-surface-dashboard

Platform Screenshot

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Platform Interface

See the Platform in Action

A unified view of your entire external attack surface with real-time monitoring, risk prioritization, and remediation tracking.

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Common Questions

Frequently asked questions

We use multiple discovery techniques: certificate transparency logs reveal all certificates issued for your domains, DNS enumeration finds subdomains, passive reconnaissance correlates infrastructure, and cloud-native APIs discover resources when given access. The goal is to find assets you've forgotten or never knew existed.
No. Our scanning is designed to be non-intrusive and mimic the reconnaissance an attacker would perform—mostly passive techniques with controlled active scanning. We don't run exploits or denial-of-service tests. Scanning is typically indistinguishable from normal internet traffic.
Traditional vulnerability scanners require you to tell them what to scan. Attack surface monitoring starts with discovery—finding assets you may not know about. It also provides continuous monitoring rather than point-in-time scans, and includes context like subdomain takeover risks and cloud misconfigurations that VA tools miss.
Read-only access to cloud accounts enables deeper visibility into IAM, storage, and configuration security. However, significant value comes from external-only monitoring without cloud access—we can discover and assess much of your attack surface from the outside, just as attackers do.
Continuous monitoring means we typically detect new assets and exposures within hours of them appearing. Critical findings—like new critical vulnerabilities or exposed sensitive data—trigger immediate alerts. Less urgent findings are included in regular reports.
Absolutely. Discovery across your entire corporate structure—including subsidiaries, acquired companies, and brands—is a core capability. This is often where the most forgotten and vulnerable assets hide.
All findings are validated before alerting. Our analysts review automated findings to confirm accuracy and assess actual risk. When you receive an alert, it's been verified and contextualized—not raw scanner output.
Yes, we provide API access and webhook integration for major SIEMs, ticketing systems, and security platforms. Findings can automatically create tickets, enrich SIEM events, or trigger automated remediation workflows.
We assess Kubernetes clusters for exposed APIs, RBAC misconfigurations, network policy gaps, and insecure pod configurations. Container image scanning identifies vulnerabilities in your deployed containers. This requires either cluster access or external-facing exposures to assess.
Continuous attack surface monitoring provides evidence of ongoing security assessment for NIS2, ISO 27001, PCI-DSS, and SOC 2. Reports document your asset inventory, vulnerability management, and remediation progress—exactly what auditors want to see.

"Within the first week, Bit Sentinel discovered 47 subdomains we had no idea existed—including a test environment with production data. Their continuous monitoring has fundamentally changed how we manage our external security posture. We now find exposures before attackers do."

SD

Head of Security

European FinTech

Attack Surface Management Specialists

Our team combines offensive security expertise with cloud-native security knowledge

OSCP AWS Security Azure Security CKS GIAC GPEN

See What Attackers See.

You can't protect what you don't know exists. Get complete visibility into your external attack surface and find exposures before attackers do.

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