Firmware hacked, need serious help

cloudmenot Said:

"Firmware hacked, need serious help[...]"

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If such is the case...

Scan with Malwarebytes for Mac:

Malwarebytes searches for malware (short for (malicious software) and spyware. Those make your Mac act in a mislead manor. So scan with it, and remove what is found from the quarantine. It is created by longtime users of these forums making it the only reliable Security Software for a Mac.

Downloads:

1. Malwarebytes Anti-Malware for Mac
2. Malwarebytes Uninstaller

Hi! I would try to do the following:

1. If you have a time machine backup, maybe you can boot to recovery mode, and attempt to restore a time machine backup before the incident happened.
2. You can setup a firewall to prevent the hacker from being able to access your computer. I'm not sure if the built-in firewall on your mac will do, but there are also 3rd party firewalls out there.
3. From macOS recovery, open terminal and type "csrutil enable" in order to enable System Integrity Protection. This will protect your computer from malicious attacks that will manipulate system files.

Hope this works!

Why do you think that?

Is there anything concrete in your mac behavior that suggests any sort of hacking?

Why do you think files are being replaced?

I don’t see anything suggesting that.