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Bad Hyper-V Username Logon Attempt

KB ID: 2359
Product: Veeam ONE | 9.5 | 10 | 11 | 12 | 12.1 | 12.2 | 12.3 | 13
Published: 2017-10-12
Last Modified: 2025-08-12
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Challenge

Veeam ONE raises the following event-based alarm: Bad Hyper-V username logon attempt.

Cause

The Bad Host Username Logon alert suggests that someone is attempting to access the host with an invalid username or password.

Solution

Veeam ONE raises the Bad Hyper-V username logon attempt alarm based on the Hyper-V event that is received from the MS Hyper-V host:

4625 Microsoft-Windows-Security-Auditing

Further issue troubleshooting should be performed on the MS Hyper-V server side.

If you would like to find out the root cause of the event, investigate the Security log on your Hyper-V host > Computer Management > Event Viewer > Windows Logs. Find the event record mentioned above and see the details.
 

More Information

In case you cannot find the event record or the record details refer to Veeam ONE server, please contact Veeam Support for further assistance.
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