The File Extensions Database


.ONION File Extension

  • Category: Ransomware encrypted Files

What is an .ONION file?

.ONION is Dharma ransomware affected data

The .onion file extension is used by a variant of ransomware called Dharma which much like other similar threats encrypts users files and demands bitcoins as ransom.

It is distributed via .zip files downloaded from internet links provided in a spam email.


How to open:

The only way to access the original files is to use a decrypter - if it exists.

How to convert:

Once you have decrypted the affected files, you can convert the content.

How to solve problems with ONION files

  • Associate the ONION file extension with the correct application. On :
    Windows: Right click on any ONION file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.ONION files". Mac: Right click (or Ctrl-click) the ONION file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .ONION is Dharma ransomware affected data. Because only the current version supports the latest ONION file format. Search, therefore, e.g. on the manufacturer website after an available .ONION is Dharma ransomware affected data update.
  • To make sure that your ONION file is not corrupted or virus-infected, get the file again and scan it with antivirus software.