Remove .Osiris File Virus Ransomware

Remove .Osiris Virus File Ransomware in just a few easy steps with our removal guide which works with all versions of Windows.

Below we will be describing .Osiris. This Ransomware-based program is known to enter your computer on its own, no approval necessary, and scan all your drives and disks for the data that is most commonly used. After that, the virus proceeds with encrypting these files and making it impossible for you to reach them in any way.  We have compiled this article to inform you about all aspects of this malware you should be aware of, and how to safely deal with it.

Characteristic features of all Ransomware programs

All Ransomware viruses are programmed to lock something on your PC, and ask for ransom afterwards, in order to unlock what they have blocked. Below in the paragraph about the versions of Ransomware you will see what such a virus could encode. Also, in every recorder case, the affected user has received an almost scary ransom-demanding message, including deadlines and preferred ways of paying the required sum of money. The viruses based on Ransomware could actually be divided into several major groups:

  • Ransomware that encrypts data: This is the scariest and the most widely-spread subtype of this malware. .Osiris, the program we are discussing, is also categorized as such. This means that these file-encrypting versions of Ransomware are fully capable of invading your PC, finding out which files exactly you normally tend to use; and making all these files inaccessible to you. Such an infection is generally among the hardest to be fought as you may remove the virus, but your files may be lost forever. Or you may complete the payment, but the hackers may decide not to give you back the access to your data and you may lose both your money and your data. Or another possibility is that your entire system may need to be reinstalled if you are unable to remove the virus itself.
  • Ransomware that attacks mobile devices: This kind of Ransomware is NOT used for the encryption of any files – it is normally exploited for the blocking of the screens of all your mobile devices such as smartphones, phablets and tablets. Your files are not in danger, but that virus could cover your entire screen with the ransom-demanding message, that you may not be able to reach anything on your device before completing the payment of the ransom.
  • Ransomware that attacks the desktops of computers: This subgroup of viruses resembles the mobile-oriented Ransomware. It functions in exactly the same way; the only difference being that this kind is computer-oriented – laptops and PC’s are its main targets. Again, your desktop/ monitor will be locked and you will be supposed to pay a ransom in exchange for the opportunity to access it back again.

Is it possible to fight them?

It is a very tricky question. If spotted in time, it may be able to prevent .Osiris from completing its malicious task. Unfortunately, this happens only to few users – they experience a slowdown in their PC’s performance and they check their Task Manager to see what has been going on. When they notice a strange process there that is using the most RAM and CPU, the only solution is to turn off the computer and NOT start it before contacting a specialist. In case the infection has already been completed and you have received the warning notification, there is little that can be done. Whatever you do will be risky at that point. What we advise you is to avoid paying the hackers, as there are other possible options like the Removal Guide below. Please, understand that you cannot really make sure that you will save your files, you can only hope for the best. At least, do not risk your money. And of course, the best way to fight such a deadly virus is by not catching it in the first place.

What to avoid, in order to stay away from .Osiris?

The best you can do is to stay away for the most usual sources of Ransomware, which are:

  • Spam in any form: Spam letters inside your emails might contain Ransomware, as well as their attachments. Also, the pop-up ads that you normally see on the web could also be contagious. Just avoid all of them as often as you can.
  • Illegal software / video/ movie/ music sources: To use programs and to download films and songs for free could be tempting, but it is recommended that you shouldn’t do that. Such places frequently contain all sorts of malware.

Last but not least, invest in a really good anti-malware tool. This you will never regret. Such tools have the latest virus databases and could protect you from various threats.

.Osiris file Ransomware Removal

Step 1 – hunt for active virus processes

To do this, you will have to make use of your Task Manager. Use the R-Ctrl+Shift+Esc key combination in order to open it. Now, go to the Processes tab and sort the list by order of CPU and/or memory used. Now, look through the list – if any process is using up very high amounts of memory or has a suspicious name or description, then it might be a process ran by the Ransomware. End that process immediately and move on to the next step.


Now open your start menu and search for MSConfig. Go to the Startup section and see if there are any suspicious entries with unknown manufacturers. Disable anything that seems illegitimate. Keep in mind that the virus may duplicate the names of real programs!


Step 2 – prepare your PC for the removal process

Next thing you need to do is boot your machine into Safe Mode and reveal all hidden files and folders. Click on the links for detailed instructions.

Step 3 – find and delete virus-related files

  1. Open your Registry Editor by typing regedit in the Run window (Winkey+R) and pressing Enter, then open Edit->Find. Search for the virus name.ransomware-guide-2ransomware-guide-3ransomware-guide-4
  2. If there are any results, delete those registry entries.
  3. Open your Start Menu and in the search field type each of the following and go to the corresponding location:
    1. %AppData%
    2. %LocalAppData%
    3. %ProgramData%
    4. %WinDir%
    5. %Temp%
  4. Delete everything from Temp. In the other folders, see if there has been added anything recently that seems suspicious. If that is the case, delete the new entries.ransomware-guide-5

Step 4 – look for Hosts file manipulation

  1. Use the Win-key+R combination to open Run and hit enter after you copy-paste the following:

notepad %windir%/system32/Drivers/etc/hosts


  1. A notepad file will open. If your PC has been infected, may be IP addresses at the bottom of the file. Delete them.
  • Note that if those IP’s are either or, then they are not coming from a virus, thus this is no indication of an infection. ransomware-guide-7

Step 5 – decrypt already encrypted files

For this, you will first have to identify the virus you are dealing with and then acquire the corresponding decryptor tool that can help you decrypt your files.

  1. To identify the Ransomware, go to this link and follow the instructions.
  2. Now that you know what you are dealing it, make a search for how to decrypt ransomware and look for a decryptor for your specific virus.

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