How to remove Shark virus and restore encrypted files

Shark ransomware virus

This article is about virus called Shark which penetrates users' computers around the world, and encrypts the files. Here you can see full information on what is Shark, and how to uninstall Shark from your machine. Furthermore, we'll explain how to recover the corrupted information and is it possible.

Shark ransomware had infected thousands of computers in various countries through most effective way: scam messages with viral attachments. Also, scammers use zero-day vulnerabilities to take control over the PC, but they are speedily corrected. When infection takes place, the virus checks the computer memory, defines the number of folders for encryption and their rough worth. Nowadays, each new ransomware knows how to cypher video, image, audio and text files in all most used formats. Ransomware cyphers all files, but those that look like business correspondence go first. All programs in the system will be unaffected because criminals are interested only in information. The process is performed via world-known RSA and AES algorithms, and its complexity is so high that it can't be bruteforced. This is the root for unbelievable effectuality of this type of viruses in recent years: an ordinary customer, even having a very high experience in suchlike things, will never restore the data, and will need to pay the price. The sole manner to recover the information is to find the scam website and obtain the encryption keys. Also there's a way to obtain encryption keys via flaws in the code of the virus itself.

For any sorts of ransomware, one thing is true: it's way easier to dodge it than to get rid of its effects. For ransomware it's most important, because, unlike most viruses, after uninstalling ransomware from the PC, the consequences of its doings will stay. To shield yourself, you have to remember a three basic principles:

    • Pay attention to the pop-ups. If the PC is polluted by Shark, it will endeavour to delete the shadow copies of your files, to make the decryption less possible. However deletion of copies needs administrator rights and your acceptance. If you'll think for few seconds before accepting the dialogue box, it may save your files and your efforts.
    • Closely examine your e-mails, especially those messages which have files attached to them. The most effective model of scam letters is the story about prize winning or parcel earning. The other efficient kind of fraud messages is a forgery for biz correspondence. summaries, reports, Bills for services or products, lawsuits and suchlike specific documents do not come without warning, and you, as a minimum, should know the person who sent it. In most of the cases it is a scam.
    • Don't disregard the signs that your hardware and software displays. It requires much of computing resources to encrypt the information. In few minutes after the infection, the machine slows down, and the encrypting process appears in Process Manager. You may recognize this event and unplug the PC before information will be totally encoded. Naturally, some data will be damaged, but you will save the other part.

We draw your attention to the fact that deleting Shark is just a, first step, which is required for the regular operation of the PC. To recover the data you'll have to follow the tips in the following paragraph of our entry. To remove any ransomware, user needs to load the workstation at safe mode and run the scanning through AV-tool. We don't suggest trying to eliminate ransomware manually, because it has different security mechanics that can interfere you. The very efficient ransomware protection manner is the uninstalling of data in case of data decryption or ransomware deletion attempt. To avoid this, follow the tips under this paragraph.

Removal instruction

Step 1. Boot into Safe mode

Safe mode

Start -> Msconfig.exe

Safe mode. Step 1

On the tab Boot select Safe boot

Safe mode. Step 2

Step 2. Check Startup folder

Start -> Msconfig.exe ->Disable unknown programs in the Startup tab


Step 3. Check hosts file

Modify hosts file, that located in C:\Windows\System32\drivers\etc\ .

Hosts file.Step 1

Open the file with Notepad and delete suspicious strings.

Hosts file.Step 2

It has to look like this:

Hosts file.Step 3

Step 4. Scan the system with antiviral scanner


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Step 5. Disable Safe mode

Start -> Msconfig.exe ->Disable Safe boot in the Boot tab

Deactivate Safe mode

If you fulfilled all conditions, described in above part of an article - it's time to decrypt the data. It's impossible to decypher the files, but we'll get them back via Windows features and the particular programs. Ordinarily, to get back the data, you should ask for assistance on targeted forums or from well-known malware researchers and AV software manufacturers. If you picked the manual information restore - read this entry, which shows all the easiest methods.

To restore information, follow the article about files decryption.

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