Sigma rule: Potential Persistence Via DLLPathOverride

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-6ec891ce799c, updated 2023-08-17T00:00:00.000Z.

Rule

Title
Potential Persistence Via DLLPathOverride
Status
test
Level
high
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2022-07-21
Modified
2023-08-17
File
rules/windows/registry/registry_set/registry_set_persistence_natural_language.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when an attacker adds a new "DLLPathOverride" value to the "Natural Language" key in order to achieve persistence which will get invoked by "SearchIndexer.exe" process

Log source

product
windows
category
registry_set

Detection

selection_root:
    # The path can be for multiple languages
    # Example:  HKLM\System\CurrentControlSet\Control\ContentIndex\Language\English_UK
    #           HKLM\System\CurrentControlSet\Control\ContentIndex\Language\English_US
    #           HKLM\System\CurrentControlSet\Control\ContentIndex\Language\Neutral
    TargetObject|contains: '\SYSTEM\CurrentControlSet\Control\ContentIndex\Language\'
selection_values:
    TargetObject|contains:
        - '\StemmerDLLPathOverride'
        - '\WBDLLPathOverride'
        - '\StemmerClass'
        - '\WBreakerClass'
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.persistence

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_persistence_natural_language.yml

Sources and licences

  • SigmaHQ

    "Potential Persistence Via DLLPathOverride" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_persistence_natural_language.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential Persistence Via DLLPathOverride",
entity page, dataset version ref-6ec891ce799c, updated 2023-08-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/a1b1fd53-9c4a-444c-bae0-34a330fc7aa8 (accessed 2026-11-03).
Underlying source: SigmaHQ rule a1b1fd53-9c4a-444c-bae0-34a330fc7aa8, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

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