What Is OXVA Virus?
OXVA virus is one of the most recent iterations of the widely spread STOP/DJVU ransomware family, currently being distributed in malspam campaigns. If your files have been changed with the .OXVA extension appended to them, then you have become yet another victim of the dangerous ransomware family.
According to cybersecurity researchers’ in-depth analysis, the so-called OXVA virus is a ransomware based on the code of one of the biggest ransomware families, known as STOP/Djvu. Numerous strains of this ransomware family have appeared on the malware scene since the original variant was released in the wild years ago.
Long story short, the OXVA virus is designed to tamper with system settings and undergo several attack stages. Once all stages are completed, the ransomware leaves your files encrypted and renamed with the .OXVA extension. Then, it demands a ransom fee for their alleged decryption. The extortion happens with the help of a ransom message which can be found in a text file, usually called _readme.txt
Beware that when an infection with Oxva ransomware takes place, some major registry keys like RUN and RUNONCE are also contaminated so that the threat can launch its files every time the infected system is rebooted. To fully remove the ransomware, it is advisable to use an anti-malware program.
OXVA Virus Summary
| Name | OXVA virus, also known as UDS:Trojan.Win32.Chapak.gen, Ransom:Win32/StopCrypt.KM!MTB, Win32:PWSX-gen [Trj], Win32:PWSX-gen [Trj], A Variant Of Win32/GenKryptik.FHJB – more detections of this virus on VirusTotal |
| File Extension | .OXVA |
| Type | Ransomware, Cryptovirus |
| Short Description | The ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them. |
| Symptoms | The OXVA Virus ransomware will encrypt your files by appending the .OXVA extension to them. |
| Ransom Demanding Note | _readme.txt |
| Distribution Method | Spam Emails, Email Attachments |
| Detection Tool |
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OXVA Virus – How Did I Get Infected?
OXVA virus falls into the category of data locker ransomware that belongs to one of the biggest ransomware families STOP/Djvu. The name of this strain is a derivative of the malicious extension .OXVA it appends to files it encrypts.Spam emails, malicious email attachments, hacked web pages, and corrupted freeware installers are likely to be utilized for the spread of OXVA ransomware virus. Since malspam propagation technique enables hackers to spread their malicious code on a large scale it is considered to be the main one. The malspam technique, in particular, can be recognized as it has specific telltale signs. So, how to recognize an email that endangers the overall security of your PC and data stored on its drives? Ask yourself the following question.
Does the email have an attached file of common type or a link presented as a button, an image, a plain URL or another clickable form? If the answer is positive, then avoid interacting with these elements. If you believe that you should view the content then scan the file / link with online malware scanners like VirusTotal. The results will provide information about the security level of the content.
Among the most popular Windows file types that are used by malware are executable files, documents and other Microsoft Office files, application files, script files, PDFs, temporary files and other.
All initial malicious changes performed by the ransomware enable it to reach the encryption stage. During this stage, the ransomware launches a built-in cipher module to corrupt personal files. Specific folders are scanned for commonly used types of files as they are likely to store valuable user data. Every time a target file is detected, its code is transformed via a strong cipher algorithm. As a result of encryption, corrupted files receive the malicious extension .repp
Unfortunately, encrypted files remain inaccessible after encryption. The malicious file extension .OXVA may appear at the end of document, music, project, database, image, video, backup, archive, and audio files.
In fact, the end goal of OXVA ransomware is to blackmail its victims into paying a ransom fee to hackers who stand behind the attacks. A ransom note file called _readme.txt informs that the decryption of corrupted files can be realized after a payment of approximately $490 – $980 ransom fee. The full content of this file can be seen below:
ATTENTION!
Don’t worry, you can return all your files!
All your files like pictures, 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:
hxxps://we.tl/t-2w6I3WpXEh
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:
manager@time2mail.chReserve e-mail address to contact us:
supportsys@airmail.ccYour personal ID:
–
We strongly advise against any contacts with cybercriminals. The ransom payment isn’t a good option as well. This step does not guarantee the recovery of your encrypted files. Oftentimes, hackers skip answering their victims. So you may get tricked once again.
At this point, STOP ransomware strains associated with .OXVA extension are not decryptable by Michael Gillespie or Emsisoft free decryption tools. However, as soon as we notice security researchers’ announcement about an update that supports the decryption of OXVA STOP ransomware variants, we will update this article with information on how to decrypt files for free.
How to Remove OXVA Virus?
OXVA virus can effectively be deleted from your computer system in case you follow the guide below. It contains the necessary information for you to get rid of this threat either manually or automatically. If you want the most effective removal method, we advise you to take advantage of using a professional anti-malware software. Such a program is often recommended by researchers, as it has the capability of thoroughly scanning your device and automatically taking care of any threat from it.
How to Decrypt .OXVA Files?
Decrypting .OXVA files can be done if they have an offline decrypt key. So, the encrypted files can be restored using the video guide below or the STOP Ransomware Decryption Steps. Both guides contain the usage of the official decryption software for this virus, that is created by independent malware researchers to help the victims decode files for free.
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Step 1: Scan for OXVA with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall OXVA 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 OXVA 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 OXVA 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 OXVA
Step 5: Try to Restore Files Encrypted by OXVA.
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 OXVA 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.
OXVA-FAQ
What is OXVA Ransomware?
OXVA 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 OXVA 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 OXVA Infect?
Via several ways.OXVA 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 OXVA 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 .OXVA files?
You can't without a decryptor. At this point, the .OXVA 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 .OXVA files successfully, then do not despair, because this virus is still new.
Can I Restore ".OXVA" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .OXVA 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 OXVA 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 OXVA ransomware and then remove it without causing any additional harm to your important .OXVA 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 OXVA 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 OXVA Research
The content we publish on SensorsTechForum.com, this OXVA 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 OXVA 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.
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