What is Pass-the-hash?

Pass-the-hash is a credential theft technique where attackers use stolen password hashes to authenticate without cracking the original password. It attacks target Windows authentication protocols and enable lateral movement across enterprise networks.

Modern IT environments rely heavily on centralized authentication, making pass-the-hash (PtH) attacks a major concern for IT admins. Attackers exploit weak credential hygiene, cached hashes, and insufficient endpoint hardening to gain unauthorized access and move laterally across systems.

How it works

Pass-the-hash attacks bypass the need to know the actual plaintext password. Instead, attackers steal NTLM password hashes from compromised systems and reuse them to authenticate to other devices or services.

Common techniques used in PtH attacks

Attackers rely on credential dumping tools and weak endpoint configurations to execute PtH attacks successfully.

• Dumping NTLM hashes from LSASS memory
• Exploiting local administrator account reuse
• Leveraging remote management tools like PsExec and WMI
• Disabling endpoint protections to avoid detection
• Targeting unmanaged or outdated devices

Why PtH attacks are dangerous

PtH attacks are difficult to detect because they use legitimate authentication mechanisms. Once attackers obtain privileged hashes, they can impersonate users and administrators without triggering traditional password-based alerts.

Impact on enterprise environments

Credential replay attacks can rapidly compromise business-critical systems if endpoint security controls are weak.

• Unauthorized access to sensitive resources
• Privilege escalation across domains
• Lateral movement within hybrid environments
• Data theft and ransomware deployment
• Long-term persistence inside networks

Best practices to prevent pass-the-hash attacks

Preventing PtH attacks requires layered endpoint security, strong credential management, and continuous monitoring.

Using Hexnode UEM and Hexnode XDR to reduce PtH risks

Unified endpoint management and extended detection capabilities are critical for defending against credential-based attacks. Hexnode helps IT admins secure endpoints, enforce security policies, and monitor suspicious activity from a centralized console.

With Hexnode UEM, IT teams can:

• Enforce strong password and authentication policies
• Restrict local administrator privileges
• Push OS and security patches automatically
• Detect unmanaged or non-compliant devices
• Enable disk encryption and remote device controls

With Hexnode XDR, security teams can:

• Monitor suspicious credential access attempts
• Detect abnormal lateral movement patterns
• Identify malicious PowerShell or PsExec activity
• Correlate endpoint telemetry for faster incident response
• Isolate compromised devices remotely

Together, Hexnode UEM and XDR strengthen endpoint visibility and reduce the attack surface that enables pass-the-hash attacks.

Conclusion

Pass-the-hash remains one of the most effective credential theft techniques in enterprise environments. IT admins must combine endpoint hardening, identity protection, and continuous monitoring to prevent attackers from abusing stolen hashes and moving laterally across networks.

FAQs

What protocols are commonly targeted in pass-the-hash attacks?

Pass-the-hash attacks primarily target NTLM authentication protocols in Windows environments.

Can MFA stop pass-the-hash attacks?

MFA significantly reduces the risk, but endpoint hardening and credential protection are also necessary.