What is Oonn virus? Why do all your valuable files appear with the .oonn extension? What happened with these files? How to open .oonn files? If you are asking all these questions, then your PC is infected with ransomware infection. Keep reading this article and find all answers.
Oonn Virus – What is It?
Oonn virus is malicious software that belongs to the ransomware-type of threats. Ransomware is malicious software that is programmed to infect computers so that it can encrypt personal files and extort a ransom payment. As identified by security researchers, Oonn files virus is a strain of the infamous STOP/Djvu ransomware.
The virus encrypts important personal files (video, photos, documents) by utilizing the cryptography algorithm AES-256. It marks all encrypted files with the specific .oonn extension. The encryption of these files prevents you from accessing them. At last, the ransomware drops a ransom note linking to a payment page. Oonn’s ransom note is called _readme.txt. In short, it states that you should use the given email addresses to contact hackers and learn how to pay them a ransom fee for a decryption tool/key for .oonn files. The ransom varies from $490 to $980. It should be paid in a cryptocurrency preferred by hackers.
Oonn Virus Summary
| Name | Oonn |
| File Extension | .oonn |
| Type | Ransomware, Cryptovirus |
| Short Description | The ransomware locks files on your computer system by encryption and demands a ransom to be paid for alleged file restoration. |
| Symptoms | The virus payload will initiate data encryption and append the extension .oonn to files. This will make them unopenable. Ransom fee is asked as payment. |
| Ransom Demanding Note | _readme.txt |
| Ransom Amount | $980 or $490 (in Bitcoin or another cryptocurrency) |
| Distribution Method | Spam Emails, Email Attachments, Counterfeit Software Updates |
| Detection Tool |
See If Your System Has Been Affected by malware Download
Malware Removal Tool
|
User Experience | Join Our Forum to Discuss Oonn virus. |
| Data Recovery Tool | Windows Data Recovery by Stellar Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive. |
Oonn Ransomware Virus – More Information
Oonn ransomware is malicious software that interferes with operating system settings. It disrupts system security by accessing essential components and installing malicious files. The primary goal of this threat is to encrypt personal files with a military-based algorithm.
The infection files of this ransomware virus are distributed via different methods. Similar to previous versions of STOP ransomware (Nile virus, Kook virus, Erif virus, etc.) the payload of Oonn virus files could be present in free download sites and torrent files. Beware that whenever something is promoted as free it could possibly contain malicious scripts inside. People victims of STOP ransomware infection have reported about such attack behaviors. Hacks, cheats, and similar software often has ransomware inside.
The virus spreads out quickly with the help of torrents, file-downloads, free apps, or promoted files that contain harmful script. Spam emails with malicious attachments and URLs to hacked pages are also considered to be among the means used for the spread of this variant of STOP ransomware.
All processes started by Oonn ransomware make the infected computer system sluggish. Noticing this symptom is sometimes enough to catch and stop the ransomware before it encrypts valuable files. During the encryption phase, this strain of STOP ransomware activates a built-in cipher module to scan system drives for commonly used types of files and encodes them with the help of the AES-256 cipher algorithm.
Files that store important information including documents, images, projects, videos, etc. are likely to be corrupted by Oonn virus. All encrypted files will get the .oonn extension.
STOP virus makers request a hefty ransom in exchange for a decryption tool for .oonn files. This information is revealed in the text file _readme.txt that is dropped on every PC infected with Oonn virus. This file contains the following message:
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-gSEEREZ5tS
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:
helpmanager@mail.chReserve e-mail address to contact us:
restoremanager@firemail.ccYour personal ID:
The Oonn virus’ ransom note is pointing to two email addresses that are related to fraudsters who stand behind the attacks with this ransomware. Apparently, they promise that a successful payment process guarantees the recovery of .oonn files. However, it is highly inadvisable to communicate with hackers and transfer them money. There is no guarantee that transferring $490 – $980 in cryptocurrency to hackers’ wallets will result in the receiving of a tool that can decrypt corrupted files.
If your computer is infected with the ransomware and your files are locked, see how you could potentially restore your data by visiting the STOP ransomware article which has an official decryptor linked there. Note, that if you have an ONLINE key, which locked your files, you might not be able to restore your files anytime soon. Backup your files and try decryption to see if you can restore them.
Remove Oonn File Virus
Removing Oonn virus from your infected PC is an obligatory step before you can use your device in a secure way again. You should know that removing such malware manually requires patience and computer skills. You should be extremely careful if you decide to try and remove manually a virus such as this one. That’s why we prepared a step-by-step ransomware removal instructions for you to follow. The guide provided below contains information on how to detect malicious files and remove them without causing permanent damage to the operating system. Once you get rid of Oonn ransomware, you can continue using the PC securely. We included information on how to try and potentially restore .oonn files as well.
Before you continue with any data recovery steps – back up your encrypted files. By creating copies of your encrypted .oonn files, you ensure that you will keep them safe and ready for the moment when free ransomware decryption is available. Mistakes happen and you don’t want to irreversibly lose your valuable files for sure.
Hope that this article is helpful for you to deal with the nasty Oonn ransomware. If you want to ask us something about the ransomware removal, the files recovery process, or something else, don’t hesitate to do it in the comment section. We will be glad to help.
Here is a video guide on how to remove ransomware from the infected machine. All steps are listed in the guide that follows as well.
Gergana Ivanova
Highly motivated writer with 5+ years of experience writing for ransomware, malware, adware, PUPs, and other cybersecurity-related issues. As a writer, I strive to create content that is based on thorough technical research. I find joy in the process of creating articles that are easy to understand, informative, and useful. Follow me on Twitter (@IRGergana) for the latest in the field of computer, mobile, and online security.
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Step 1: Scan for Oonn Virus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall Oonn Virus and related malware from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by Oonn Virus on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by Oonn Virus there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Boot Your PC In Safe Mode to isolate and remove Oonn Virus
Step 5: Try to Restore Files Encrypted by Oonn Virus.
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
Ransomware infections and Oonn Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
Oonn Virus-FAQ
What is Oonn Virus Ransomware?
Oonn Virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
What Does Oonn Virus Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does Oonn Virus Infect?
Via several ways.Oonn Virus Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
Another way you may become a victim of Oonn Virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open .Oonn Virus files?
You can't without a decryptor. At this point, the .Oonn Virus files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your .Oonn Virus files successfully, then do not despair, because this virus is still new.
Can I Restore ".Oonn Virus" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Oonn Virus files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of Oonn Virus Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate Oonn Virus ransomware and then remove it without causing any additional harm to your important .Oonn Virus files.
Can I Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can Oonn Virus Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the Oonn Virus Research
The content we publish on SensorsTechForum.com, this Oonn Virus how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the Oonn Virus ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
- Verify Facebook, LinkedIn and Twitter personal profiles.
Hola, Te escribo desde Venezuela, y soy victima de un virus ( .oonn ) cuando descargue un programa. Necesito Ayuda para recuperar mis archivos, en resumen descargue un programa y se instalo el virus como no sabia lo que era hice una copia de los archivos infectados y luego formatee la PC e instale en limpio windows 10 lo que no puede es recuperar los archivos.
La carpeta con los archivos encriptados, ejecute antimalwarebyte para eliminar algún virus y luego use el programa STOP Djvu Descifrador de Emsisoft (.oonn variaciones) y me da un error Necesito AYUDA GRACIAS