hey Magnar
To check whether the files in the folder wsuscontent are malwares or not can you submit(upload) the infected file. Below is link to the portal where you can submit
1.
Can you go to https://www.microsoft.com/security/portal/submit.aspx and submit the infected file.
2. It contains the information how to submit the files
2. After submitting sample it wil generate the submissionID. Can you email me that so that I can follow up with our researchers. You can mail me at montyj@microsoft.com
Please let me know if you face any problem and I will be more than happy to help you out.
Monty Jain[MSFT] montyj@microsoft.com
Monty Jain