90e8600a-9b5c-4153-bb06-1d8fbe0ef232

nstr.sys

We were not able to verify the hash of this driver successfully, it has not been confirmed.

Description

nstr.sys is a vulnerable driver and more information will be added as found.

  • UUID: 90e8600a-9b5c-4153-bb06-1d8fbe0ef232
  • Created: 2023-01-09
  • Author: Michael Haag
  • Acknowledgement: |

Commands

sc.exe create nstr.sys binPath=C:\windows\temp \n \n \n  str.sys type=kernel && sc.exe start nstr.sys
Use CasePrivilegesOperating System
Elevate privilegeskernelWindows 10

Detections

YARA 🏹

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Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed driver files

Sigma 🛡️

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Names

detects loading using name only

Hashes

detects loading using hashes only

Sysmon 🔎

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Block

on hashes

Alert

on hashes

Resources


  • https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-driver-block-rules

    • Known Vulnerable Samples

    PropertyValue
    Filenamenstr.sys
    Creation Timestamp
    MD5
    SHA1
    SHA256455bc98ba32adab8b47d2d89bdbadca4910f91c182ab2fc3211ba07d3784537b

    Imports

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    Imported Functions

    Expand

    Exported Functions

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    Sections

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    Signature

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    source

    last_updated: 2025-08-28