Apparent brute force attack from LAN???

[JerseyMike]

So BitDefender started throwing brute force attack warnings on one of the Windows PCs on my network. Checked the firewall logs and I see this (see attachment)

The source is an external IP in Germany, but the log says it's coming from the LAN interface?? I have Germany IPs geo-blocked from the WAN, but not sure how this is "internal"?? Would appreciate some assistance in figuring this out.