What is Bonsoir ransomware?
Bonsoir is a dangerous computer threat that locks users’ data by using a strong encryption algorithm. Despite the fact that this is a new virus that appeared this year, it has already managed to spread around the world. Like other ransomware viruses, it encrypts and turns into unreadable all the personal files on the victim’s computer such as images, videos, documents, and so on. In order to gain access to these files again, victims have to pay a big sum of money as a ransom. However, you should know that if your computer is infected with Bonsoir ransomware, don’t try to give cybercriminals money, in most cases, they would not even answer. Still, you may use this tutorial to remove Bonsoir Ransomware and decrypt .bonsoir files.
Once the encryption procedure is done, the virus appends each infected file with .bonsoir extension. For example, a file called mydocuments.doc will change to mydocuments.doc.bonsoir. After that, the virus leaves a TXT file (HOW-RECOVER-MY-FILES.txt) that urges victims to visit thier website and get further instructions on how to decrypt your files. The site has .onion domain that means that it is only accessible through the anonymous Tor browser.
Screenshot of criminals’ tor site:
In the end, it’s up to you to believe it or not, but let us warn you – no one can ensure that they would do their part of the deal. On the contrary, there is a high risk of being deceived and simply left with nothing. The only reliable way to solve the problem is to remove Bonsoir ransomware from the system using appropriate software in order to stop the malicious actions of the virus and then restore your data from the backup.
The content of the ransom note:
.::: Bonsoir Ransomware :::.
~ We have to notify you that your device has been infected and all of your files are encrypted ~
~ This means you can not access any of your files without purchasing the “Bonsoir Decryptor” from us ~
The decryption solution is easy:
To buy decryptor instantly, you must visit our website using the TOR BROWSER!
1. Download and install the Tor browser on your computer: https://www.torproject.org/download/
2. Visit the our website with Tor browser: 5w4okefqrb66br3ibnb573ac7ds77buxtjxozhvvnbs4wy6cqmwhsyad.onion/login/uoyryo653ebumsyr7mtb
3. Enter Login-Code:
096573B4F67B03BF6C37381205ED517BE432ECD7DA [всего 512 знаков]
4. Takes the necessary steps by following the instructions provided on the our website.
5. We look forward to seeing you on cold winter nights.
There are two solutions to remove Bonsoir Ransomware and decrypt your files. The first is to use an automated removal tool. This method is suitable even for inexperienced users since the removal tool can delete all instances of the virus in just a few clicks. The second is to use the Manual Removal Guide. This is a more complicated way that requires special computer skills.
Screenshot of files encrypted by Bonsoir virus:
How Bonsoir ransomware gets on my computer?
Cybercriminals use various techniques to deliver the virus to the target computer. Ransomware viruses can infiltrate victims’ computers more than in one or two ways, in most cases, cryptoviral extortion attack is carried out with the help of the following methods:
- This is the most used distribution method. Cybercriminals use fraudulent emails to pose as official organizations or business companies (receipts, winning notifications, confirmation of order; bank messages, and so on) to lure unsuspecting users into clicking on a malicious attachment – just one click to make your files inaccessible. To mislead the user and make it look like an official email, cybercriminals add an extra symbol to the email address, for example, instead of email@example.com, you may see service[.]@paypal.com or service[_]@paypal.com. That’s why you should always pay attention to received emails and identify the sender to make sure that this is from a trusted source. Also, the presence of grammatical and typographical errors in the text of the message indicates that this is a fake. If nothing’s wrong, scan the attachment with antivirus software first and then you can open it. Compliance with all these rules will help you save a lot of nerve, time, and money.
- Hackers use the special toolkit to exploit known vulnerabilities in systems or applications. That’s why you should always make Windows updates on time and keep them up to date. Remember that these updates close the security holes in the system through which the virus can enter your computer. Make sure that your operating system itPay is not outdated and is officially supported, for example, Windows XP, Vista, 7 are no longer supported.
- Bonsoirous dubious web-sources can contain malicious scripts or hyperlinks that can infect your system. Our advice – avoid visiting P2P sites and websites with illegal content (pirated software, movies, music). Use only legitimate services and remember – there’s no free lunch in this world.
- Cybercriminals often abuse the built-in Windows feature – Remote Desktop Protocol to infect the computer with ransomware. That way, they access the target computer remotely and install virus manually. To avoid infection via RDP, you should set a different from 3389 TCP port and use a more strong password.
|Type of threat||Ransomware, cryptovirus, file-locking virus|
|Distribution||Spam email attachments, RDP, pirated software, torrent websites, phishing sites|
In order to completely remove ransomware from your computer, you will need to install an antivirus software. We recommend using SpyHunter
The only effective method to restore files is to copy them from a saved backup. If you don’t have a suitable backup, you may use third-party recovery software such as Stellar Data Recovery
How to remove Bonsoir ransomware?
Try Stellar Data Recovery
Stellar Data Recovery is one of the most effective tools that can recover lost and corrupted files — documents, emails, pictures, videos, audio files, and more — on any Windows device. The powerful scan engine can detect compromised files and finally save them to specified destination. Despite its advancedness, it’s very concise and simple so that even the most inexperienced user can figure it out.
Email security is the first line of defense against ransomware viruses. To do this, we recommend that you use MailWasher. MailWasher blocks ransomware viruses coming through spam and phishing, and automatically detects malicious attachments and URLs. In addition, malicious messages can be blocked even before the recipient opens them. Since the main source of the spread of ransomware viruses are infected emails, antispam significantly reduces the risk of a virus appearing on your computer.
You may find more detailed information about antivirus products in our article – Top 5 Antivirus Software for Windows
Once Bonsoir ransomware has been successfully removed, you can begin the file decryption procedure.
How to decrypt files infected by Bonsoir Ransomware?
Method 1. Restore your files with the help of Recovery Tool
In case your PC has been attacked by ransomware, you may restore your files by using file recovery software. Stellar Data Recovery is one of the most effective tools that can recover lost and corrupted files — documents, emails, pictures, videos, audio files, and more — on any Windows device. The powerful scan engine can detect compromised files and finally save them to specified destination. Despite its advancedness, it’s very concise and simple so that even the most inexperienced user can figure it out.
- Run Stellar Data Recovery.
- Select type of files you want to restore and click Next.
- Select the drive and folder where your files are located and date that you want to restore them from and press Scan.
- Once the scanning process is done, click Recover to restore your files.
- After this, select a destination and click Start Saving to save restored data.
Since new ransomware-type viruses appear almost every day, there is no technical possibility to issue a decryptor for each virus. In this case, the recovery tool comes to the rescue. Despite the fact that this is one of the most effective methods in the absence of a decryptor, this is not 100 percent and not the only way.
Method 2. Restore the system using System Restore
Although the latest versions of Bonsoir Ransomware can remove system restore files, this method may help you partially restore your files. Give it a try and use standard System Restore to revive your data. The entire process is preferably carried out in Safe Mode with Command Prompt:
For Windows XP/Vista/7 users:
Restart your computer and before your system starts – hit F8 several times. This will prevent system from loading and will show Advanced boot options screen. Choose Safe mode with Command Prompt option from the options list using up and down arrows on your keyboard and hit Enter.
For Windows 8/10 users:
- Click the Start button, then select Settings
- Click Update & Security, then select Recovery and click Restart now.
- After your device reboots, go to Troubleshoot > Advanced options >Startup Settings > Restart
- After your PC restarts, you should press F5 key to Enable Safe Mode with Command Prompt.
After the system is loaded in Safe Mode with Command Prompt, do following:
- In the Command Prompt window, type cd restore and hit Enter.
- Then type rstrui.exe and hit Enter again.
- Once a new window shows up, click Next.
- Choose the date before the infection appearance and click Next again
- In the opened pop-up window, click Yes to start system restore.
Method 4. Roll the files back to the previous version
Previous versions can be copies of files and folders created by Windows Backup (if it is active) or copies of files and folders created by System Restore. You can use this feature to restore files and folders that you accidentally modified or deleted, or that were damaged. This feature is available in Windows 7 and later versions.
- Click the encrypted file and choose Properties
- Open the Previous Version tab
- Select the latest version and click Copy
- Click Restore
How to prevent your system from Ransomware?
No one is safe from infection with a virus that secretly encrypts your data. But in order to minimize this risk, you need to follow the rules:
1. Always make Windows updates on time and keep them up to date. Remember that these updates close the security holes in the system through which the virus can enter your computer.
2. The most efficient way to avoid data loss is of course to make a backup of all important data from your computer. It is enough just to synchronize the necessary folders with one of the cloud services, so as not to be afraid to see the text requiring the payment of bitcoins in exchange for a decryption key. It can be a cloud or a remote hard drive on the network. If you store all your files on the Internet, the likelihood of virus infection will be lower. Do not make copies to external hard drives, as this could damage them.
3. Since spam email is the most popular form of spreading ransomware-type viruses, the user should never open email attachments without first having scanned them with antivirus. Just clicking on the link or opening the attachment can damage the operating system (Windows) in a few minutes, damage important data and infect other machines with the virus.
4. All previous methods do not matter if you do not have a reliable antivirus. The presence of anti-virus protection on your computer can prevent all these unpleasant surprises. Anti-virus software will protect you from malware, money loss, time loss, invasion of your personal life. Now the antivirus market is so huge that it is difficult to make a choice in favor of one of them. If you have not decided who to give preference to, we suggest you familiarize yourself with our Top 5 Antivirus Software for Windows