virus and malware detect software

There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 

The The Built in Security  is all that is required to protect the computer.

Should “ Certain & Specific Software “ referenced from above be installed - it will negatively impact macOS. It is suggested, to download directly from a respected ASC Contributor, the application Malwarebytes for Mac. 

It is free or paid for added features. 

Run the Application and it should remove the malware / adware. Once done, restart computer and test.

rony-z wrote:

I’m asking because I’ve received an email from unknown with my past visited website username and demand to pay $2500 or he will send my details to some contact people that I have.

He said that he succeed to enter my contact list people.

I don’t care about my details as I don’t have nothing to hide.

but it’s unusual for me.

Did you action this?

Provide any personal data to this unknown e-mail ?

Often times - these are Scams.

Or the website visited was hacked and the hacking is using the stolen information to start Scam. This is done in the hope the user ( you ) will provide just enough information for them to do bad things like steel your money or identify.

As a precaution Checklist: If you want to see if anyone else has access to your device or accounts

EDITED WED Jan 19, 2022 @ 07:25 EST

Effective defenses against malware and other threats

The iOS operating system for Apple iDevices is equally Hardened against such issues.

The only way a person other that you could access the Contacts on the iDevice ifs if you have giving the Pass Code and or has your exact face if Facial Recognition is enable on the iDevice .

That would probably be not the case.

Welcome and Thank you too.

Do come back to the ASC Forums, in the future, if / or when additional question may arise

You can install Malwarebytes. It is safe to leave installed. Just use the free tier, it won’t slow down your Mac at all by scanning constantly or anything.

All of that is already built into the OS. You need nothing else.

If you think you have installed out adware, use Etrecheck to remove it.