Remove Osiris Ransomware

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I wrote this article to help you remove Osiris Ransomware. This Osiris Ransomware removal guide works for all Windows versions.

You must have heard about the notorious Locky ransomware and its countless versions. Well, this article is created specifically for Locky`s latest variant, known as Osiris, based on the “.osiris” extension it appends at the end it each encrypted file. This particular version is not any less harmful than the others. It follows the exact same pattern of invading your system, encrypting all of your data and then blackmailing you for money. Not to mention the damages it causes to your machine and the huge risk it exposes your privacy at.

We wrote this article to help you deal with this greedy parasite. We have prepared an easy-to-follow removal guide which will not only delete the pest from your system but it can also help you restore your lost files. However, before proceeding to this most important step, take a few minutes to read how Osiris operates, how it enters your PC and, of course, what you can do to prevent another infection.

Ransomware infections use tricks so they can dope you into allowing them to enter. Otherwise, they simply cannot get in. If you see a big neon sign which says “DANGEROUS RANSOMWARE”, of course, you won`t give it green light. But if this message seems like a legitimate one, the chances are you will give it your approval. Especially, if you are not paying enough attention. That’s why Osiris relies on spam email messages with malicious attachments. They pose as excel invoices from legitimate companies and if you open them, you get infected.

Another way via which Osiris finds its way into your computer is malvertising. It hides behind pop-up ads, commercials, banners, etc. and if you happen to click on any of them you are basically inviting the pest into your system. That’s why it is crucial to be extra careful when surfing the web. Such infections are lurking from everywhere just waiting for the proper timing. Don’t open suspicious emails. Especially if you don’t know who they are from. Delete them right away. Also, beware of ads. They may look helpful or interesting but, in fact, all they do is to deliver malware.

Remove Osiris Ransomware
The Osiris Ransomware

Once the ransomware has slithered in, it moves on to step number two. The encryption. Osiris utilizes the RSA-2048 and AES-128 algorithms to lock all of your files. This includes pictures, documents, music, videos, Word files, work-related files, etc. After it is done with them, they are no longer accessible to you. It changes their names with [8_random_characters]-[4_random_characters]-[4_random_characters]-[8_random_characters]-[12_random_characters] and adds its malicious “.osiris” extension. Seeing this extension means that the locking process is complete and your files are now unusable. Your PC cannot recognize them due to their new modifications. You can try renaming them or moving them into another folder but it won`t help you. All you are left with are encrypted and empty icons.

After Osiris has finished locking your data it proceeds to the most important part of its operation. The extortion. After all, the only purpose this ransomware was created for is money. Your money, to be exact. The parasite drops a ransom note informing you of the unpleasant situation and claiming that the only way of getting your files back is with the decryption tool. It goes without saying that this tool doesn’t come for free. It is the thing you are supposed to pay for.

The crooks demand $1880 ransom sum which you are asked to pay in Bitcoins (2.5) as it is an untraceable online currency and the hackers can keep their anonymity. Do not consider this option even for a second. How do you know that the cybercriminals will send you a fully working decryption tool if they even send you any? Most of the times they just keep victims` money and don’t give them anything in return. So, do you want to be a part of these statistics? Do you want to end up with no money and no files? Not to mention that if you pay, the crooks will use your money for nothing but more malware creation and their distribution.

You will be practically supporting the ransomware industry but the worst part is that you are exposing your privacy at risk while doing it. Crooks will have access to your personal and financial details. Don’t allow them to have such power over you. It is not a risk worth taking given the fact you will probably not receive what you paid for. Or, imagine you do receive a working decryptor and you unlock your files. But what about the ransomware? The tool doesn’t remove it so it remains in your system ready for a second attack. With paying, you are going to lose either way.

So, use our removal guide below. It is free and all you have to do is to follow the steps in the exact order. Also, in the future, it is a good idea to create backups of your most important files. This way you will know that you cannot lose them even if you are infected. However, getting a reliable anti-malware software could really help you in the fight against cyber threats. Just keep in updated and perform regular scans on your PC to be sure it is clean.

Osiris Ransomware Uninstall

Method 1: Restore your encrypted files using ShadowExplorer
Usually, Osiris Ransomware deletes all shadow copies, stored in your computer. Luckily, the ransomware is not always able to delete the shadow copies. So your first try should be restoring the original files from shadow copies.

  1. Download ShadowExplorer from this link: http://www.shadowexplorer.com/downloads.html.
  2. Install ShadowExplorer
  3. Open ShadowExplorer and select C: drive on the left panelshadowexplorer
  4. Choose at least a month ago date from the date field
  5. Navigate to the folder with encrypted files
  6. Right-click on the encrypted file
  7. Select “Export” and choose a destination for the original file

Method 2: Restore your encrypted files by using System Restore

  1. Go to Start –> All programs –> Accessories –> System tools –> System restore
  2. Click “Nextsystem restore
  3. Choose a restore point, at least a month ago
  4. Click “Next
  5. Choose Disk C: (should be selected by default)
  6. Click “Next“. Wait for a few minutes and the restore should be done.

Method 3: Restore your files using File Recovery Software
If none of the above method works, you should try to recover encrypted files by using File Recovery Software. Since Osiris Ransomware first makes a copy of the original file, then encrypts it and deletes the original one, you can successfully restore the original, using a File Recovery Software. Here are a few free File Recovery Software programs:

  1. Recuva
  2. Puran File Recovery
  3. Disk Drill
  4. Glary Undelete
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Daniel Stoyanov
Daniel Stoyanov has a Master's degree in Computer Science from the Technical University of Sofia, Bulgaria. He is also a Microsoft Certified Professional. Daniel provides top cyber security news with in-depth coverage of malware, vulnerabilities, PC and Network security, online safety. If you have any questions feel free to ask him right now.

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