Short bio

OSX.Proton is Malwarebytes’ detection name for a Trojan dropper that exfiltrates private information  from macOS systems.


OSX.Proton will add a line to the sudoers file, which manages access to root privileges:

Defaults !tty_tickets

Type and source of infection

OSX.Proton captures information, which includes logging the user’s admin password in clear text, among a lot of other personally-identifying information (PII) and writes it to a hidden file.
OSX.Proton has been spread disguised as legitimate applications.

OSX.Proton disguised

OSX.Proton disguised as a Symantec tool


Since OSX.Proton is designed to steal login credentials, you will need to take some emergency actions post-infection. You should treat all online passwords as compromised and change them all.


Malwarebytes for Mac detects and removes OSX.Proton.


Malwarebytes for Mac will detect and remove the components of this malware.

Download and install the latest version of Malwarebytes for Mac.

Click the “Scan Now” button to perform a system scan.

If threats are detected during the scan, a count of detected threats is displayed. More detailed threat information is displayed after the scan completes.

Click “Confirm” to move the detected threats to Quarantaine.

If a restart is required to complete remediation of threats detected during a scan, you will be notified. When a restart is required, please remember to save all work before clicking “Restart”.

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