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MITRE ATT&CK® Mitigation

T1171: LLMNR/NBT-NS Poisoning Mitigation

Disable LLMNR and NetBIOS in local computer security settings or by group policy if they are not needed within an environment. [1]

Use host-based security software to block LLMNR/NetBIOS traffic. Enabling SMB Signing can stop NTLMv2 relay attacks.[2][3][4]

EnterpriseT1171MitigationObject v1.0 Modified
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Historical object

This ATT&CK object is revoked or deprecated in the current MITRE ATT&CK release.

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Glexia's Take

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Official MITRE ATT&CK definition

LLMNR/NBT-NS Poisoning Mitigation

Disable LLMNR and NetBIOS in local computer security settings or by group policy if they are not needed within an environment. [1]

Use host-based security software to block LLMNR/NetBIOS traffic. Enabling SMB Signing can stop NTLMv2 relay attacks.[2][3][4]

View the same entry on attack.mitre.org (MITRE-hosted reference; in-page links above use the Glexia ATT&CK library.)

Glexia analysis

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Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.

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Change history

Object version and sync metadata

The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates .

ATT&CK release
19.1
Object version
1.0
Created
Modified
Raw hash
6dfcb97ee446cdda...
Imported snapshots across ATT&CK releases (1)
Release Bundle imported Object version Modified Status Raw hash
19.1 1.0 Current bundle Deprecated 6dfcb97ee446…
Raw source

Mirrored ATT&CK source object

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Source references

External references and citations

MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.

  1. [1]
    ADSecurity Windows Secure Baseline

    Metcalf, S. (2016, October 21). Securing Windows Workstations: Developing a Secure Baseline. Retrieved November 17, 2017.

    Open source URL
  2. [2]
    byt3bl33d3r NTLM Relaying

    Salvati, M. (2017, June 2). Practical guide to NTLM Relaying in 2017 (A.K.A getting a foothold in under 5 minutes). Retrieved February 7, 2019.

    Open source URL
  3. [3]
    Secure Ideas SMB Relay

    Kuehn, E. (2018, April 11). Ever Run a Relay? Why SMB Relays Should Be On Your Mind. Retrieved February 7, 2019.

    Open source URL
  4. [4]
    Microsoft SMB Packet Signing

    Microsoft. (2008, September 10). Using SMB Packet Signing. Retrieved February 7, 2019.

    Open source URL
  5. [5]
    mitre-attack T1171
    Open source URL
Source and licensing

Source: MITRE ATT&CK®. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation. Glexia is not affiliated with or endorsed by MITRE.

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