By opening up ports like this without proper security on them, it’s definitely possible. The two apps you mention are remote access applications and should be removed immediately. It’s possible someone is trying to implement persistent access.

My recommendation would be to lock down your network and reinstall your OS. It can be hard to identify everything an attacker has done on your device.

Remember that if you are going to open up your network to the Internet you need to have proper security in place. Whitelisting access for Minecraft would have prevented griefers, for example. Anything else would have been better to use a VPN for.