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Short bio

OSX.Pirrit is Malwarebytes’ detection name for an advanced adware family that targets macOS systems.


Users may see advertisements that do not originate from the websites they are visiting. OSX.Pirrit uses methods to deliver these ads which are very similar to more serious malware.

Type and source of infection

Old versions of OSX.Pirrit installed browser extensions or proxy servers on the affected systems. The more recent versions will typically be installed through a user executed DMG (disk image files used for macOS software).


Malwarebytes for Mac detects and removes  OSX.Pirrit 


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”.