Djvu VirusRansomwareRemoval Guide

Nnll Virus Removal Guide (+Decrypt .nnll files)

Nnll Virus – Details

Nnll is a malicious software functioning as typical ransomware. Michael Gillespie, the well-known malware researcher, first found this new name in the DJVU ransomware family.

Nnll was developed for the sole purpose to encrypt all popular file types. Realistically, as quickly as the encryption is successfully achieved, the users are unable to get access to them. Nnll ransomware includes its own “.nnll” to all the encrypted files. For example, the file “price_list.xls”, as soon as crypted by Nnll, will be entitled as “price_list.xls.nnll”. As soon as the encryption is accomplished, Nnll puts its own unique text file (_readme.txt) into all the folders that save the encrypted files.

The message mentioned by text file requesting the random os very comparable to the notices provided by other ransomware risks coming from the DJVU family. The caution basically shows that the information has been encrypted and the only service to get access to it is to use a special standalone key. Regretfully, this statement is definitely true.

The approach to secure the files utilized by Nnll is not completely researched. Nevertheless, there is no doubt that each computer system owner might be released a special decryption key, which is definitely distinct. It is incredibly tough to recuperate the information without the suitable type in location.

“Don’t worry, you can return all your files!”, from text file message:

Don't worry, you can return all your files! virus

One more peculiarity of the Nnll virus is that the users are not able to get access to the key. The decrypting key is hosted on a special server under the complete control by the criminals who have launched the Nnll infection into the world wide web. In order to get the key and bring back the essential data, the users are told to connect with the frauds via e-mail or by telegram and to pay the ransom in the quantity of $980.

The message likewise states that individuals need to contact the Nnll authors within 72 hours upon the minute of the data encryption. The alert suggests that by doing so individuals will get a 50% discount rate, therefore, the ransom quantity falls to $490.

No matter what the quantity of the ransom is, we highly recommend that you do not pay the ransom. There is no warranty that these online scoundrels will keep their promises, so they might not care at all what the victims feel about the encryption, even when the quantity of the ransom is gotten into their accounts. Thus, paying ransom often does not result in an effective healing. So, the users might simply lose their money for absolutely nothing.

Likewise, we urge you not to contact the scams as they instruct. Do not move cash into their wallets. There are no applications that might split the Nnll ransomware or bring back the data at no cost. For that reason, the only correct decision is to restore the data from possible backups (if offered).

Virus Summary

NameNnll Ransomware
File Extensionnnll
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .nnll extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsLokas, Besub, Nusar
Nnll Removal Tool   GridinSoft Anti-Malware
Nnll Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Internet is now filled with infections comparable to the Nnll virus. For example, this specific hazard is basically similar to Brusaf and other ransomware-type infections. These damaging energies have actually been developed in order to secure the crucial information and reveal the need for the users to pay the ransom. All these infections use the identical algorithm to generate the particular key for effective data decryption.

Unless the Nnll ransomware is still under the advancement procedure or has actually got some hidden bugs, it is not possible to restore the information by hand. Therefore, the only working option to avoid the loss of your crucial information is to regularly preserve updated backups of all your essential files.

Another important piece of suggestions is to save the backups on unique storage not linked to your main device. For example, you may keep it on the USB Flash Drive, or some external drive, or by using the cloud data storage services. Keeping the backups on your routine drive is extremely dangerous, since the backup might also be encrypted by the Nnll virus.

Leakages for the Nnll ransomware attack.

Nnll utilizes numerous courses to penetrate the susceptible computers. It is not certain what specific method was used in your case, however, the invasion might take place via the following channels:

  • bundling with third-party programs, mainly free software;
  • spam emails from the unidentified senders;
  • websites supplying complimentary hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Nnll ransomware may camouflage itself as some real application, for example, through the deceptive informs requiring installation of some software application update. This is the most common trick used by the frauds to inject the Nnll virus files into the system. In this manner users partly participate in its installation, without plainly comprehending the danger.

Additionally, the scams may send out unsolicited spam email with tricky alerts encouraging the people to open dubious attachments or click on some download links, for instance, those motivating the people to open specific images, text files, tax files and other information.

No doubt, opening these files or clicking on the destructive links may basically damage the system. Fake Acrobat Reader upgrade notifications may result in the Nnll ransomware infiltration. Likewise, downloading the cracked software application might in addition consist of the ransomware installer. The last however not the least, setup of Nnll might take place through some Trojan horses that may be installed stealthily into the system and without the user’s direct consent or even permission.

Preventing the Nnll attack.

Of course, there is no absolute warranty that your computer system will be always free of any malware attacks, nevertheless, we would like to share some helpful suggestions with you to make it more secure. Ensure to pay very very close attention while searching the web and specifically while downloading cost-free programs. Do not open any dubious email attachments, especially if the sender is not known to you.

Do not forget that specific freeware installer might also contain some other extra apps in the package. These extra applications might be very harmful. It is of utmost value to keep your anti-virus software and your os in general to be always effectively updated.

It is quite rational that downloading pirated apps is prohibited, however, furthermore, such unapproved software usage may likewise bring major damage to your PC. Thus, do not download any broken programs. Plus, the fact that your existing anti-virus did not protect the system from the Nnll ransomware is an excellent factor for you to reevaluate your options and change to another program that can render the protecting functions on a much better level.

Below please find the quotation from the Nnll text file:


 Don't worry, you can return all your files!
 All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
 The only method of recovering files is to purchase decrypt tool and unique key for you.
 This software will decrypt all your encrypted files.
 What guarantees you have?
 You can send one of your encrypted file from your PC and we decrypt it for free.
 But we can decrypt only 1 file for free. File must not contain valuable information.
 You can get and look video overview decrypt tool:
 Price of private key and decrypt software is $980.
 Discount 50% available if you contact us first 72 hours, that's price for you is $490.
 Please note that you'll never restore your data without payment.
 Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.

 To get this software you need write on our e-mail:

 Reserve e-mail address to contact us:

 Our Telegram account:

Screenshot of files with “.nnll” extension added by the ransomware:”

Nnll Ransomware - encrypt files with .nnll extension

Use GridinSoft Anti-Malware to remove Nnll ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can get GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

Use Emsisoft Decryptor for restore nnll files

You can download Emsisoft Decryptor by clicking the button below:

  Emsisoft Decryptor

  1. Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
  2. Once the license terms are accepted, the primary decryptor user interface opens.
  3. By default, the decryptor will pre-populate the locations to decrypt with the currently connected drives and network drives. Additional locations can be added using the Add” button.
  4. Decryptors typically offer various options depending on the particular malware family. The available options are located in the Options tab and can be enabled or disabled there. You can find a detailed list of the available Options below.
  5. After you have added all the locations you want to decrypt to the list, click the “Decrypt” button to start the decryption process. The screen will switch to a status view, informing you about the current process and decryption status of your files
  6. The decryptor will inform you once the decryption process is finished. If you require the report for your personal records, you can save it by clicking the “Save log” button. You can also copy it straight to your clipboard to paste it into emails or forum posts if you are asked to.
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Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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