How to remove Nuclear virus and restore encrypted files

Nuclear ransomware virus

The page is about Nuclear virus which gets into users' laptops in all countries of the world, and corrupts their files. In this page we've assembled complete information about Nuclear's essence, and how to eliminate Nuclear from your computer. In addition, we'll tell you how to recover the cyphered data and is it possible.

Nuclear ransomware already penetrated many computers in different parts of the world with help of easiest manner: scam e-mails with dangerous attachments. Sometimes hackers use zero-day vulnerabilities to penetrate the PC, but they are quickly corrected. After penetration, ransomware reviews the computer memory, determines the number of folders for encryption and their general cost. Currently, any new ransomware knows how to encrypt image, video, audio and text files in all popular formats. Extra attention is attracted to business documents, since medium and large companies are the priority target for fraudsters. Ransomware corrupts only information, and does not affect the software, so that the man can pay the ransom with help of an infected computer. Encryption is carried out via world-known RSA and AES algorithms, and its intricacy is so above the average level that decipherment of files with no key is impossible. This is the ground for such an incredible effectuality of this kind of viruses in last years: usual user, even having a very high experience in suchlike things, won't ever recover the files, and will be forced to pay ransom. The only way to get back files is to crack the scam webpage and get the master key. Some skilled hackers can retrieve the keys due to faults in viruse's program code.

For all kinds of ransomware, one thing is true: it is way simpler to prevent it than to cure it. For encrypting programs it's very relevant, as, unlike regular viruses, when you eliminate ransomware from the computer, the fruits of its actions will stay. To guard yourself, you need to keep in mind these three simple principles:

    • Don't admit any changes to the computer, coming from weird software. The easiest manner of file restoration is the recovery through Shadow Copies, and fraudsters have added the removal of SC in the default functionality of ransomware. Anyway, removal of shadow copies requires admin rights and confirmation from the operator. If you'll stop for a moment before verifying the checkbox, it might save your data and your time.
    • Be careful with the messages which contain files. If this letter comes from an unknown address and it is about obtaining some prize, a lost package or something similar, this is most likely ransomware. The other popular type of these letters is a forgery for business correspondence. Bills for products and services, lawsuits, summaries, claims and suchlike specific files cannot be sent accidentally, and the addressee should know the person who sent it. In most of the cases it is a scam.
    • Do not ignore the symptoms that your laptop shows. Information encryption is a complicated process that needs a large amount of computer resources. When the virus is starting to work, the machine slows down, and the encryption process emerges in Process Manager. You may anticipate this event and switch off the machine before information will be completely spoiled. Of course, the certain amount of data will be corrupted, but you will save the rest of them.

Virus deletion is not the happy end - it's just a one move from many before the full file restoration. To recover the information you should read the instructions in the special chapter of our entry. To remove the virus, you need to launch the laptop in safe mode and scan it through AV-tool. We don't suggest anyone to uninstall the virus by hand, since it has many security features which can counteract you. Some viruses are able to completely delete encrypted information, or part of it, when trying to uninstall the virus. To avoid this, follow the guide below.

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 made all actions, mentioned in above paragraph - it's time to decypher the data. In fact, this is not about decipherment, since the encryption algorithms owned by fraudsters are extremely complicated. There are the certain exceptions, but usually data recovery needs lots of time and money. If you are really interested in the by-hand file restore - take a look at this item, which describes all the easiest methods.

To restore information, follow the article about files decryption.

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