Attack on the router?

Hi,

We had today some strange behaviour on our router.
The Router is RB1100AH with version 6.42.x
As you can see on the screenshot we got a TCP connection from 60.191.52.254
He locked one of the server with a crypto locker.
Is this a bug in the routeros? Has he hacket the pptp connections?

Thanks Chris

Have you ever opened for administration (using Winbox) from the internet?
If so it may be that you have been hacked.
Do a net install with latest fixed ros, and do a search for how to secure remote admin.
Example, use VPN etc.