Sigma rule: Potentially Suspicious Call To Win32_NTEventlogFile Class

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-95251c562c58, updated 2023-07-13T00:00:00.000Z.

Rule

Title
Potentially Suspicious Call To Win32_NTEventlogFile Class
Status
test
Level
high
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-07-13
File
rules/windows/process_creation/proc_creation_win_susp_nteventlogfile_usage.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects usage of the WMI class "Win32_NTEventlogFile" in a potentially suspicious way (delete, backup, change permissions, etc.) from a PowerShell script

Log source

product
windows
category
process_creation

Detection

selection_class:
    CommandLine|contains: 'Win32_NTEventlogFile'
selection_function:
    CommandLine|contains:
        - '.BackupEventlog('
        - '.ChangeSecurityPermissions('
        - '.ChangeSecurityPermissionsEx('
        - '.ClearEventLog('
        - '.Delete('
        - '.DeleteEx('
        - '.Rename('
        - '.TakeOwnerShip('
        - '.TakeOwnerShipEx('
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.defense-impairment

Related rules

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/process_creation/proc_creation_win_susp_nteventlogfile_usage.yml

Sources and licences

  • SigmaHQ

    "Potentially Suspicious Call To Win32_NTEventlogFile Class" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_susp_nteventlogfile_usage.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: Potentially Suspicious Call To Win32_NTEventlogFile Class",
entity page, dataset version ref-95251c562c58, updated 2023-07-13T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/caf201a9-c2ce-4a26-9c3a-2b9525413711 (accessed 2026-11-03).
Underlying source: SigmaHQ rule caf201a9-c2ce-4a26-9c3a-2b9525413711, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.