Topic starter
06/11/2026 6:34 pm
TL;DR: Pass-the-hash remains viable because Windows still accepts a stolen NTLM hash as proof of identity, letting attackers reuse valid credentials for lateral movement without cracking the password, according to OLOID. The real weakness is not password strength alone but hash exposure, standing privilege, and NTLM dependence.
Editorial analysis by NHI Mgmt Group, based on content published by OLOID: “Pass-the-Hash Attacks: How They Work, Detection, and Prevention”.
By the numbers:
- The Hive ransomware group hit more than 1,300 companies and collected about $100 million in ransom payments by November 2022.
Key questions
Q: What should teams do first when pass-the-hash activity is suspected?
A: First confirm the scope by correlating authentication and endpoint telemetry, then isolate affected hosts, reset exposed privileged credentials, and block further NTLM-based logons from compromised machines.
Q: Why does a stolen NTLM hash let attackers move laterally?
A: A stolen NTLM hash can be reused to authenticate without knowing the password, so the attacker can present the hash in the challenge-response exchange and obtain access as that user.
Q: How do local admin passwords affect pass-the-hash risk?
A: Unique, rotated local admin credentials reduce pass-the-hash risk by preventing the same local administrator hash from working on every endpoint.
Practitioner guidance
- Reduce NTLM dependencies Inventory the systems that still require NTLM, then move those workflows to Kerberos or other supported authentication paths before blocking legacy usage broadly.
- Protect endpoint credential material Enable Credential Guard and LSA protection on systems that handle privileged logons so LSASS cannot be read by ordinary tooling.
- Remove reused local administrator passwords Deploy unique, rotated local admin passwords with Windows LAPS so one exposed local hash cannot unlock an entire workstation fleet.
Bottom line: Pass-the-hash succeeds because Windows accepts a reusable NTLM-derived secret, which means the compromise starts when hashes become reachable, not when passwords are guessed.
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06/11/2026 6:41 pm
Pass-the-hash is a governance failure in credential material, not just an authentication weakness. The attacker does not need the password once the hash is available, so the control boundary has already been crossed before sign-in begins. That means identity programmes have to govern where hashes can be exposed, how long they remain useful, and which accounts are allowed to leave reusable material on endpoints.
A question worth separating out:
Q: How do you detect pass-the-hash attacks on Windows?
A: Detect it by finding logons that use NTLM in ways that do not match the user’s normal behaviour, especially when credentials are reused from a compromised host. Look for lateral movement between Windows systems, repeated authentications with the same account from different machines, and remote service creation. Prioritise domain admins and other privileged accounts.
👉 Read our full editorial: Pass-the-hash persists because Windows still trusts stolen hashes