The problem in your situation is that Lansweeper only can read the standard Windows event logs.
Windows defender event logs are under Application and Services log.
Microsoft\Windows\Windows Defender\Operational
It is on the Lansweeper wishlist.
Maybe a Deployment or Action can do the job?
Using Powershell:
https://blogs.technet.microsoft.com/heyscriptingguy/2013/10/25/use-powershell-to-see-what-windows-defender-detected/
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Update:
Maybe you can create an
'On Event' Taskschedule that starts a
EventCreate?
The EventCreate can write an custom event to the standard Windows Event logs.