Oonn Virus Removal Guide (+Decrypt .oonn files)

Oonn Virus – Details

Oonn is a destructive software application functioning as typical ransomware. Michael Gillespie, the popular virus researcher, first discovered this new name in the DJVU ransomware family.

Oonn was created for the sole function to encrypt all popular file types. Rationally, as soon as the encryption is effectively accomplished, the users are unable to get access to them. Oonn ransomware includes its own “.oonn” to all the encrypted data. For instance, the file “price_list.xls”, once crypted by Oonn, will be entitled as “price_list.xls.oonn”. Once the file encryption is achieved, Oonn puts its own unique text file (_readme.txt) into all the folders that save the encrypted files.

The alert stated by text file requesting the random os really similar to the notices provided by other ransomware risks coming from the DJVU family. The caution basically shows that the files have been secured and the only solution to get access to it is to use a distinct standalone key. Regretfully, this declaration is absolutely true.

The technique to encrypt the files utilized by Oonn is not entirely researched. However, there is no doubt that each computer owner might be issued an unique decryption key, which is absolutely unique. It is exceptionally difficult to recuperate the data without the proper type in location.

“Don’t worry, you can return all your files!”, from _readme.txt message:

One more peculiarity of the Oonn ransomware is that the users are unable to get access to the key. The decrypting key is hosted on a special server under the complete control by the scoundrels who have actually launched the Oonn infection into the world wide web. In order to get the key and bring back the essential information, the users are informed to get in touch with the frauds through e-mail or by telegram and to pay the ransom in the quantity of $980.

The message likewise states that the people should get in touch with the Oonn authors within 72 hours upon the minute of the information file encryption. The alert indicates that by doing so individuals will get a 50% discount, therefore, the ransom amount drops down 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 criminals will keep their pledges, so they might not care at all what the victims feel about the encryption, even when the quantity of the ransom is received into their accounts. Hence, paying ransom typically does not lead to a successful healing. So, the users might merely lose their money for absolutely nothing.

Likewise, we urge you not to contact the scams as they instruct. Do not transfer cash into their wallets. There are no applications that could break the Oonn virus or restore the data at no charge. For that reason, the only proper decision is to restore the data from possible backups (if available).

Virus Summary

Name Oonn Ransomware
File Extension oonn
Type Ransomware
Family DJVU
Short Description The 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.
Symptoms File 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 .oonn extension to all the files modified by it.
Distribution Method Adware bundles and software cracks
Similar Infections Nile, Kook, Erif
Oonn Removal Tool   GridinSoft Anti-Malware
Oonn Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Internet is now loaded with infections comparable to the Oonn virus. For example, this particular hazard is essentially similar to Brusaf and other ransomware-type infections. These destructive energies have actually been established in order to secure the crucial data and reveal the demand for the users to pay the ransom. All these infections use the similar algorithm to generate the specific key for successful data decryption.

Unless the Oonn ransomware is still under the advancement process or has got some hidden bugs, it is not possible to restore the information by hand. Thus, the only working solution to prevent the loss of your crucial data is to regularly keep updated backups of all your important files.

Another essential piece of advice is to store the backups on unique storage not connected to your primary device. For example, you might save it on the USB Flash Drive, or some external drive, or by using the cloud data storage services. Keeping the backups on your system drive is very risky, given that the backup may likewise be encrypted by the Oonn virus.

Leakages for the Oonn ransomware attack.

Oonn utilizes numerous courses to penetrate the susceptible computers. It is not particular what specific technique was used in your case, however, the intrusion may occur by means of the following channels:

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

There are times when the Oonn virus may camouflage itself as some authentic application, for instance, through the misleading notifies requiring installation of some software upgrade. This is the most typical technique used by the scams to inject the Oonn infection files into the system. This way users partially participate in its setup, without plainly comprehending the threat.

In addition, the scams might send out unsolicited spam email with challenging informs encouraging the people to open dubious attachments or click some download links, for example, those motivating individuals to open specific pictures, text files, tax documents and other information.

No doubt, opening these files or clicking on the malicious links may essentially harm the system. Fake Media Player update alerts may result in the Oonn ransomware infiltration. Likewise, downloading the broken software may furthermore include the ransomware installer. The last but not the least, setup of Oonn may happen through some Trojan horses that may be installed stealthily into the system and without the user’s direct approval or even authorization.

Preventing the Oonn ransom virus attack.

Obviously, there is no absolute guarantee that your computer system will be constantly devoid of any malware attacks, however, we would like to share some helpful tips with you to make it safer. Make sure to pay very very close attention while browsing the web and especially while getting cost-free programs. Do not open any suspicious email attachments, particularly if the sender is not known to you.

Do not forget that specific freeware installer might also include some other additional apps in the bundle. These additional applications may be very harmful. It is of utmost value to keep your anti-virus software and your os in basic to be constantly effectively updated.

It is quite sensible that downloading pirated programs is illegal, however, furthermore, such unauthorized software usage might likewise bring serious damage to your computer. For this reason, do not download any cracked programs. Plus, the fact that your existing anti-virus did not protect the system from the Oonn ransomware is an excellent reason for you to reassess your options and switch to another program that can render the safeguarding functions on a much better level.

Below please find the quotation from the Oonn text file:

ATTENTION!
 
 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:
 https://we.tl/t-2P5WrE5b9f
 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:
 restorealldata@firemail.cc
  
 Reserve e-mail address to contact us:
 gorentos@bitmessage.ch 

 Our Telegram account:
 @datarestore

Screenshot of files with “.oonn” extension added by the virus:”

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

1.Download GridinSoft Anti-Malware.

You can download 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.

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.

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

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

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.

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.

Use Emsisoft Decryptor for restore oonn 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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