Suspicious "calc" process in background.

Question

I have been noticing that my computer is running slow. But when I open the task manager, it comes back to normal. So after noticing that this malicious software "hides" when I open the task manager, I used another monitoring software for my computer (CAM from NZXT) since I use one of their products to customize the lighting. After using the monitoring software, I noticed that when I try to close the task manager again, my computer continues to process something in the background because according to the CAM software that I use, I can see the "calc" software working in the background, using almost 50% of my processor. It is working above 60 and spikes to 80% even if I am not doing anything. And when I open the task manager again, it comes back to normal CPU loads. 

I tried uninstalling the windows calculator and still, the "calc" process was not removed in the list of the processes according to CAM.

*and also the "rundll32" was using almost 10% of the load second to the malicious "calc" process.

Specs are:

Intel Core i7 4790

8gb 1600 RAM

240 GB SSD (main boot drive)

1 TB HDD

RX 570 4GB

Answer 1

Please try off-line tool with bootable media, e.g. Kaspersky Rescue Disk. When system is working malware has a possibility to mask itself,

Answer 2

Thanks for the reply, I already tried bitdefender and malwarebytes but still, the suspicious malware is nowhere to be found. I will try kaspersky and the other similar antiviruses. In the meanwhile, may I ask the possible places where these kinds of malware are from? Sorry for my bad English.

Answer 3

Hi,

please run off-line malware scan using such tools as Kaspersky Rescue disk or similar.

This is known malware behavior.