How to remove Nulltica virus and restore encrypted files

This item is dedicated to ransomware called Nulltica that penetrates users' PC in all countries of the world, and cyphers the data. In this item you can see full information about what is Nulltica, and how to eliminate Nulltica from the machine. Furthermore, we will explain how to get back the encrypted files and is it possible.

Nulltica is the perilous program getting into PC's mostly with help of Trojans and phishing e-mails. Occasionally scammers use zero-day vulnerabilities to get into the PC, but they are speedily fixed. When infection takes place, Nulltica checks the computer memory, determines the quantity of files for encryption and their approximate cost. Currently, each modern virus can encrypt image, audio, video and text info in all known extensions. Nulltica corrupts all files, but the ones that look like business correspondence go first. Ransomware corrupts only information, and doesn't spoil the programs, so that the man can use the machine to make the payment. Encryption is executed through world-known RSA and AES algorithms, and it is so complicated that that it cannot be bruteforced. Such complexity is the foundation for such a stunning success of ransomware in last years: usual customer, even if he has a pretty high experience in suchlike things, will never get back the files, and will need to pay the price. The only manner to get back the data is to find the scammer's webpage and retrieve the encryption keys. Sometimes it is possible to withdraw these keys due to flaws in the code of the virus itself. During the encryption, Nulltica changes the extension of files to .lock, and asks for $50 as a ransom.

For all types of ransomware, one thing is true: it is way simpler to dodge it than to cure it. For ransomware this is most important, as, in contradistinction to common dangerous programs, when you delete ransomware from the PC, the effects of its actions will stay. You easily can minimize the chances to get encrypting virus by following these regulations:

    • Do not ignore the signs that your machine displays. It takes much of computing resources to encode the data. If you detect an abnormal reduction in laptop power or see a suspicious process in the Process Manager, you need to shut down the PC, launch it in safe mode, and search for threats. This, in case of penetration, will save a lot of your files.
    • Closely inspect your e-mails, especially the messages which have files attached to them. If the message comes from an unknown address and it tells about winning some prize, a lost parcel or something like that, this is most likely a scam message. The #2 effective kind of such messages is a forgery for biz correspondence. It is normal to take an interest and read the message even if it's sent to the wrong address, but remember that a single click on the viral file may cost you a lot of time, efforts and money.
    • Pay attention to the dialog boxes. The simplest method of information restoration is the recovery via Shadow Copies, so scammers have included the deletion of shadow copies in the default features of ransomware. The deleting of copies needs admin rights and confirmation from the operator. If you'll stop for few seconds before verifying the checkbox, it might save your information and your time.

You should understand that the deletion of the virus is only the first and required step for the safe work of the computer. To recover the information you will have to follow the advices in the special paragraph of our entry. To remove any ransomware, user has to load the system in safe mode and run the scanning through AV-tool. We don't recommend anyone to uninstall ransomware by hand, because it has many protection features which can interfere you. Many malware can fully remove corrupted data, or part of it, when trying to eliminate the virus. This is very unwanted, and the following paragraph will help you to avoid it.

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 steps, mentioned in above part of an entry - it's time to recover the information. In fact, this is not literally decryption, as the encrypting manners owned by web-criminals are extremely complicated. There are the few chances, but usually file recovery requires lots of time and money. If you picked the manual information recovery - read our entry, which shows all the most efficient methods.

To restore information, follow the article about files decryption.

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