User Attack Surface

How Guard finds breach-exposed employee email addresses on your domains and flags domains open to email spoofing.

A Vulnerability With No CVE

Your users are an attack surface in their own right. Social engineering — the art of manipulating people into divulging information, clicking links, or taking actions that compromise security — targets people rather than systems. No firewall, EDR solution, or SIEM can patch the human element.

Guard extends attack surface management to the human layer — monitoring for credential exposures, assessing email security posture, and tracking the dark web for employee data so you can quantify and reduce your organization's human risk.

Why Customers Add the User Attack Surface

Because attackers target people, not only systems

Phishing, pretexting, and spear phishing exploit trust, urgency, and routine — things no technical control can eliminate.

Firewalls, EDR, and SIEM systems detect technical indicators of compromise — not human decision-making errors. Even with perfect DMARC enforcement, attackers register look-alike domains that bypass email authentication. AI-generated content and deepfakes are reshaping attack sophistication, making signature-based detection ineffective. When the attack vector is a convincing email from what appears to be your CEO, your security stack watches it sail right through.

Because employee credentials leak outside your control

Infostealer malware and breaches of third-party services feed employee credentials into dark web marketplaces and combo lists. Every exposed credential is a door waiting to be opened.

Because the attacks are evolving faster than awareness training

Social engineering is no longer just email phishing. Attackers use voice calls (vishing) and text messages (smishing). QR code phishing (quishing) exploits the perception that scanning a code feels safer than clicking a link. And deepfake audio and video let attackers impersonate executives convincingly enough to request fraudulent transfers.

Guard helps organizations understand and defend against the full spectrum of social engineering techniques targeting their users:

Attack Type	Vector
Phishing	Email with malicious links or attachments
Spear Phishing	Targeted email to specific individuals
Whaling	Executive-targeted impersonation
Business Email Compromise	Compromised or spoofed business email accounts
Vishing	Voice calls with social pretexts or deepfakes
Smishing	SMS/text messages with malicious links
Quishing	QR codes redirecting to credential harvesting
Pretexting	Fabricated scenarios to extract information
Deepfakes	AI-generated audio/video impersonation

What Guard Discovers and Tests

Guard addresses the user attack surface through continuous monitoring across multiple dimensions — extending the same discover-and-test methodology used for technical attack surfaces to the human layer.

Credential Exposure Monitoring

Guard continuously monitors for organizational credentials appearing in breach datasets, dark web marketplaces, paste sites, and infostealer logs. When employee credentials surface in a new breach or combo list, Guard creates a finding with the exposure source, affected accounts, and recommended remediation — enabling password resets before attackers can leverage stolen credentials.

Email Security Posture Assessment

Guard assesses and monitors DMARC, SPF, and DKIM configurations across all organizational domains — including subsidiary and acquired domains that often lack proper authentication. Because major mailbox providers require DMARC from bulk senders, proper email authentication is both a security and a deliverability requirement.

Guard identifies domains vulnerable to spoofing, detects look-alike domain registrations, and flags misconfigurations that allow attackers to impersonate your organization.

Dark Web Monitoring for Employee Data

Guard continuously scans underground marketplaces, forums, and breach repositories to identify exposure of employee PII, authentication data, and corporate credentials. Alerts fire when newly discovered exposures are tied to organizational email domains or known employee identities — providing early warning before compromised data is weaponized in targeted attacks.

Phishing Simulation Integration

Guard integrates with phishing simulation platforms to correlate real-world attack surface exposure with internal susceptibility testing. If an employee's credentials appear in a dark web breach and they clicked a phishing simulation link last month, that's a compounding risk that demands immediate attention. This correlation between external exposure and internal behavior creates a true human risk score.

Security Awareness Training Metrics

Guard tracks human risk metrics alongside technical attack surface metrics — click rates, reporting rates, time-to-report from phishing simulations, and training completion rates. These metrics feed into the same dashboards and risk scoring that security teams use for technical vulnerabilities, giving leadership a unified view of organizational risk across both technical and human dimensions.

How It All Connects: The Human Risk Chain

Guard's user attack surface monitoring follows the same continuous discovery model as external and internal attack surfaces:

Seed your organization — Add your corporate email domains, subsidiary domains, and key personnel identifiers
Continuous credential monitoring — Guard monitors breach datasets, dark web marketplaces, and infostealer logs for exposed employee credentials
Email posture assessment — Guard continuously validates DMARC, SPF, and DKIM configurations across all domains, flagging misconfigurations and look-alike domain registrations
Behavioral correlation — Phishing simulation results and training metrics are correlated with exposure data to identify compounding risks
Risk scoring and remediation — Findings enter the same triage pipeline as technical vulnerabilities, with severity scores that account for both exposure level and behavioral indicators

This creates a closed loop: exposure is discovered, correlated with human behavior, scored for risk, and tracked through remediation — continuously.

What Users See in the Platform

Credential Exposure Findings

When compromised credentials are discovered, Guard creates findings with the breach source, affected email addresses, exposure date, and whether the credentials include plaintext passwords, hashed passwords, or associated PII. Findings link directly to the affected user accounts for rapid remediation.

Email Security Posture Dashboard

A dedicated view shows DMARC, SPF, and DKIM status across all organizational domains. Domains without proper authentication are flagged as risks, and configuration changes are tracked over time to ensure remediation sticks.

Human Risk Metrics

The metrics dashboard includes human risk indicators alongside technical metrics — credential exposure counts, phishing simulation performance, training completion rates, and trend lines showing whether your human attack surface is growing or shrinking over time.

Risk Management

Social engineering findings integrate into Guard's standard risk management workflow. Credential exposures, email posture gaps, and human risk indicators appear in the same triage queue as vulnerability findings from external and internal scanning — enabling unified prioritization across all attack surfaces.

Regulatory and Compliance Drivers

The user attack surface has direct regulatory implications across multiple frameworks:

Framework	Requirement	How Guard Helps
SEC Cybersecurity Rules	Material incidents must be disclosed within 4 business days; annual cybersecurity risk reporting required	Continuous monitoring reduces incident likelihood; human risk metrics support annual disclosures
NIST CSF 2.0	PR.AT category requires cybersecurity awareness training; phishing-resistant authentication recommended	Training metrics, simulation results, and credential hygiene tracking map directly to PR.AT controls
GDPR	Breach notification within 72 hours	Early detection of employee data exposure enables proactive response before breach notification triggers
SOC 2	Security awareness training and access controls required	Dashboards provide auditable evidence of training completion and credential monitoring

Summary

The user attack surface is the one most traditional security tools are blind to. Guard brings the same continuous discovery, testing, and risk management methodology to the human layer that security teams already rely on for external, internal, cloud, and application attack surfaces — creating a unified view of organizational risk that accounts for both technical vulnerabilities and human behavior.

Social engineering will always target people. Guard ensures you see the exposure before attackers exploit it.

Still need help? Ask the team