Danger level:  
  (99/100)

Osiris virus. How to delete? (Removal tutorial)

removal by Olivia Morelli - - | Type: Ransomware
12

Another Locky update: Osiris virus has just started spreading

Osiris virus is the latest variant of the infamous Locky. It seems that this time hackers closed their beloved Norse mythology book and looked for inspiration in the Egyptian gods’ world. The new malware is named under Egyptian God’s of the afterlife, death, life, and resurrection[1] name. However, there’s nothing saint about Osiris ransomware. It continues its predecessors’ work. Malware sneaks inside the computer, encrypts files and demands paying the ransom. However, the newest variant slightly differs from the previous Locky versions – Odin, Thor, Aesir and .zzzzz file extensions virus. This time hackers put more effort into malware’s ability to get through antivirus programs. Unfortunately, security tools often fail do recognize this cyber threat, so it’s important to all computer users to pay extra attention to online security[2] and behave responsibly online. However, ransomware is sneaky and can trick even cleverest computer users. In case of the attack, you should not consider paying the ransom. Instead of that, install Reimage and remove Osiris from the computer. If you have data backups[3], you have all important files. Otherwise, you should take ransomware attack as a painful lesson why it’s important to make data backups regularly.

Osiris malware has been spotted at the beginning of December 2016. After infiltration, it damages files using AES and RSA encryption algorithms. However, it not only append .osiris file extension to all encrypted files but also renames them. Filenames names are replaced by this formula: [8 symbols]-[4 symbols]-[4 symbols]-[8 random symbols]-[12 random symbols], where first 16 symbols are victim’s ID number which is provided in the ransom message. Following data encryption, ransomware leaves three files (OSIRIS.html, OSIRIS0-[4-random-numbers].html, and OSIRIS.bmp) with detailed explanation what have happened to victim’s documents, pictures, and other records, and how to get back access to them. Osiris ransom note provides links to the payment website where victims are offered to purchase Locky Decrypter. It seems that the size of the demanded ransom might vary depending on the amount of the encrypted files. Locky started its career from attacking medical institution in the United States[4], so its latest version might attack both – home computer and various organization networks. However, in case of the attack, it’s important to concentrate on Osiris removal instead of transferring bitcoins to cyber criminals.

Malware distribution technique

The main distribution method of all Locky versions is malicious email attachments. Since the beginning of the Locky era in February 2016, hundreds of different malicious emails have been sent to innocent computer users. Emails that include Osiris virus executive file usually has the subject line ‘Photo/Scan/Document from office’ and includes attached .zip file. Before opening this archive, you should think if someone from your office is supposed to send you something. If not, do not let your curiosity to let the virus in. You might receive lots of other misleading emails where cyber criminals pretend to be from reputable companies or organizations. Therefore, before opening any attached file, you should double check the information online or call the institution directly. Recently, Locky managed to step inside Facebook and spread malicious .svg file[5] via direct messages. Therefore, Osiris ransomware virus might be waiting for you on social media as well. For this reason, when you receive a suspicious link or picture from a friend, ask him or her if it’s really safe to open.

Guidelines for Osiris removal

For Osiris removal, you have to install reputable and professional malware removal software. We recommend choosing either Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware. However, malware might stop you from installing and updating security tools. For that, you might need to reboot your computer as shown in the instructions below. Keep in mind that anti-malware removal tools can only remove Osiris from the system but cannot restore damaged files. For that, you will need to use data backups or other options presented at the end of the article.



 

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Computer security experts recommend using Reimage to uninstall Osiris virus. Reimage scans the entire computer system and checks whether it is infected with spyware/malware or not. If you want to remove computer threats and secure your computer system, you should consider buying the licensed version of Reimage.

You can find more details about this program in Reimage review.

You can find more details about this program in Reimage review.
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Press mentions on Reimage

Manual Osiris Virus Removal Instructions:

Eliminate Osiris using Safe Mode with Networking

You can detect malware using Reimage.
You need to purchase a licensed version of it to remove threats.
More details about Reimage.

  • Step 1: Restart your computer in Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Safe Mode with Networking from the list Choose 'Safe Mode with Networking' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Networking from the list of options in Startup Settings. Choose 'Enable Safe Mode with Networking' option
  • Step 2: Remove Osiris

    Sign in to your account and launch any Internet browser. Download a legitimate anti-malware software, for instance, Reimage. Make sure you update it to the latest version and then run a full system scan with it to detect and eliminate all malicious components of the ransomware to remove Osiris completely.

If your ransomware does not allow you to access Safe Mode with Networking, please follow the instructions provided below.

Eliminate Osiris using System Restore

You can detect malware using Reimage.
You need to purchase a licensed version of it to remove threats.
More details about Reimage.

  • Step 1: Restart your computer in Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Command Prompt from the list Choose 'Safe Mode with Command Prompt' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Command Prompt from the list of options in Startup Settings. Choose 'Enable Safe Mode with Command Prompt' option
  • Step 2: Perform a system restore to recover files and settings
    1. When the Command Prompt window appears, type in cd restore and press Enter. Type 'cd restore' without quotes and hit 'Enter'
    2. Then type rstrui.exe and hit Enter.. Type 'rstrui.exe' without quotes and hit 'Enter'
    3. In a new window that shows up, click the Next button and choose a restore point that was created before the infiltration of Osiris and then click on the Next button again. When 'System Restore' wizard comes up, click 'Next'. Choose a preferable restore point and click 'Next'
    4. To start system restore, click Yes. Hit 'Yes' and start system restore
    After restoring the computer system to an antecedent date, install and check your computer with Reimage to uncover any remains of Osiris.

Bonus: Restore your files

Using the tutorial provided above you should be able to eliminate Osiris from the infected device. novirus.uk team has also prepared an in-depth data recovery guide which you will also find above.

If you do not have data backups, chances to restore files encrypted by Osiris are low. However, you should not pay the ransom. It‘s better to try other data recovery options and restore at least some of your files.




There are a couple of methods you can apply to recover data encrypted by Osiris:

Restore files using Data Recovery Pro



Data Recovery Pro is a professional that has been created to restore lost, damaged or encrypted files.

  • Download Data Recovery Pro (https://novirus.uk/download/data-recovery-pro-setup.exe);
  • Install Data Recovery on your computer following the steps indicated in the software’s Setup;
  • Run the program to scan your device for the data encrypted by Osiris ransomware;
  • Recover the data.

Take advantage of Windows Previous Versions feature



You can restore individual files using Windows Previous Versions features if you have enabled System Restore function before the Osiris ransomware attack.

  • Right-click on the encrypted document you want to recover;
  • Click “Properties” and navigate to “Previous versions” tab;
  • In the “Folder versions” section look for the available file copies. Choose the desired version and press “Restore”.

It is strongly recommended to take precautions and secure your computer from malware attacks. To protect your PC from Osiris and other dangerous viruses, you should install and keep a powerful malware removal tool, for instance, Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware.

About the author

Olivia Morelli
Olivia Morelli

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References

Source: https://www.2-spyware.com/remove-osiris-ransomware-virus.html

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