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Windows – Deletion Event Log Detection Test

Windows – Deletion Event Log Detection Test

Deletion of Windows Event Log SIEM Detection Test

The deletion of a Windows Event Viewer Security log is a common pattern of post-attack evasion by malicious software and attackers. By monitoring for this deletion, you can have immediate awareness of what should be an unusual activity — with the benefit of having those same deleted event logs stored in Blumira for analysis.


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Set Up Instructions

How to Test Deletion of Windows Security Log


  • Windows Host must be set up with NxLog configuration and properly logging to Blumira
  • GPO Advanced Logging (Logmira) – must be installed and logging properly to Blumira

Testing Steps:

  1. There are various ways to delete the Security Event Viewer Logs, however the easiest is to use a PowerShell command
  2. Open PowerShell with “Run as Administrator”
  3. Run the command Clear-EventLog "Security"
  4. This detection test will trigger a finding in your Blumira console and the appropriate notifications per your Blumira settings