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Event ID: 518 Source: Security

Source
Description
A notification package has been loaded by the Security Account Manager. This package will be notified of any account or password changes. Notification Package Name: <package name>
Comments
 
As per Microsoft: "This event record indicates that the Security Accounts Manager (SAM) has loaded a notification package. There is a possibility that this action can have security implications. The person responsible for maintaining the Security Account needs to understand what each notification package does and any effects the package might have on system security". See MSW2KDB for additional information about this event.
Notification packages are DLLs that receive and handle events generated by authentication packages. A programmer can implement such a notification package to monitor and respond to authentication events. This is useful for applications that need to perform additional processing during logon or logoff, or maintain state information that must be updated when authentication events occur.

For a list of authentication packages see the link to Windows Authentication Packages.

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