What Is Btnw Virus?
Btnw virus is a STOP/DJVU ransomware variant. This is a large family of crypto-malware, that infects Windows computers and encrypts their files. This particular version uses the _readme.txt ransom note and the .btnw file extension. Its main goal is to convince infected victims to pay a huge ransom in BitCoin to get the files working again – something that is not recommended.
Read this article to understand more information about .btnw virus and how to remove it, plus ways to restore your files without having to pay these criminals.
Btnw Virus – Why Is My PC Infected?
Viruses, like Btnw ransomware use “traps” or random selected victims on which they spam the malicious files, that cause the infection on their computers. The main infection file has a so-called malware obfuscator, which makes sure your anti-virus does not alarm you when an infection takes place. Only advanced anti-malware apps with ransomware shields can detect and stop such viruses.
Btnw Virus – How Did I Get Infected?
Btnw virus may use two main methods to infect Windows computers:
- If it is sent to you as an e-mail attachment or a URL.
- By being downloaded from a shady site.
If it uses malicious e-mails, then the virus may send the file as an attachment, pretending to be a document.
- Work-related files.
- E-Tickets for events or flights.
In case the Btnw virus uses this method, the files may infect your machine using malicious macros, for example:
The Btnw virus may also use various methods, like upload the file on a third-party website, where these files may appear as:
- Fake installation files.
- Software patches.
- Self extracting archives or regular archives.
- Cracked portable versions of apps.
- Software or game cracks.
- Key generator (or Keygen).
Btnw Virus – What Does It Do?
The Btnw virus may first download its payload files, which are used for its virus activities. They may be located in the following directories of Windows:
Btnw virus may also use the _readme.txt ransom note which is also among the dropped files:
What Are .btnw Files
The .btnw files are encoded using the AES encryption algorithm. What this threat does is scan for the files and then encrypt them based on their file type:
- Videos (.mp4, .avi, etc.).
- Audio (.mp3, .wav, etc.).
- Picture file kinds (.jpg, .png, .etc).
- Archive file formats (.zip, .rar, etc).
- Documents of different types (.docx, .pptx, etc.).
How to Open .btnw Files
After encryption, the Btnw virus leaves your files looking like the following:
The files cannot be opened in any way as their core structure data is changed, since they are encrypted.
What To Do If My Files Are .btnw?
This is why you should not try to change the extension and not touch them, as it may permanently break the files.
Btnw Virus – Details
|Name||Btnw 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|
|Short Description||The ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them.|
|Symptoms||The Btnw Virus ransomware will encrypt your files by appending the .btnw extension to them.|
|Ransom Demanding Note||_readme.txt|
|Distribution Method||Spam Emails, Email Attachments|
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How To Protect Windows from Btnw In The Future?
Btnw virus is a dangerous threat and to protect Windows from it, you will need to learn how to safely store your files to protect them from ransomware viruses after firstly removing the threat safely using the guide here.
How to Remove Btnw Virus?
Btnw virus can be deleted from your device if you follow the instructions below. They contain methods that will help you get rid of the virus either by yourself or automatically from your device. For the best removal and future protection the automatic method is highly recommended, because it includes scanning your machine using a professional anti-malware program.
How to Decrypt / Fix .btnw Files?
The .btnw files can be decoded unless you have the decryption key. This can happen if the key is offline-based. In this case, you can use the STOP Ransomware decryption steps or the instructions in the video guide below. See them for more information.
What is Btnw Ransomware?
Btnw 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.
Can Btnw Ransomware Cayse Damage?
Yes, ransomware can damage your computer. Ransomware is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
Should I Ignore Viruses, Like Btnw?
No, you should never ignore ransomware. It can encrypt your data and block access to your computer, making it impossible to access your files until you pay a ransom.
Ignoring ransomware could lead to the permanent loss of your data, as well as the potential for the ransomware to spread to other computers on your network. Additionally, paying the ransom does not guarantee that your data will be recovered.
How Does Btnw Infect?
Via several ways.Btnw 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.
After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.
Another way you may become a victim of Btnw 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 .Btnw files?
You can't. At this point, the .Btnw files are encrypted. You can only open them once they are decrypted using a specific decryptionkey 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 .Btnw files successfully, then do not despair, because this virus is still new.
Can I Restore ".Btnw" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Btnw 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 Btnw 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 Btnw ransomware and then remove it without causing any additional harm to your important .Btnw files.
Also, keep in mind that viruses like Btnw ransomware also install Trojans and keyloggers that can steal your passwords and accounts.
What to Do If I Cant Get The Files Back?
There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:
- Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
- Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
- Also, check if some of the files that were encrypted can be re-downloaded from the web.
- Another clever way is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
- You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.
More tips you can find on our forums, where you can also asks any questions about your ransomware problem.
How to 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 Btnw 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.
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.
Why Is the Ransom Paid in Crypto?
Cryptocurrency is a secure and untraceable form of payment, making it the ideal choice for ransom payments. It is difficult to trace, and the transactions are almost instantaneous. This means it is nearly impossible for authorities to track the payment and recover the money.
Can 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 Btnw Research
The content we publish on SensorsTechForum.com, this Btnw 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.
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.