This just started happening today for about half an hour at intervals of 5 minutes from 4:31-4:59PM EST. This has never happened before.
Current Windows installation is close to a year old and was a clean install.
The one "Malware" event detail was me attempting to resolve the IP in my browser.
Custom scan of C: with Windows Defender, and a Malwarebytes scan both came up clean.
Attaching the FRST scan files as per the FAQ on what to do, and also the detection history/scan logs from Malwarebytes.
FRST.txt
Addition.txt
malwarebytes_detection_history.txt
malwarebytes_report.txt