How to remove Bonsoir QNAP NAS Ransomware and decrypt .bonsoir files

What is Bonsoir QNAP NAS Ransomware

According to recent forum reports, users are dealing with a new ransomware infection known as Bonsoir. This virus targets local networks (NAS, QNAP, Samba/SMB, Synology) encrypting the stored data with AES-CFB algorithms. The decryption of files is thereby offered inside of a text file called HOW-RECOVER-MY-FILES.txt. To elaborate on data encryption, we should mention that Bonsoir applies a one-word extension to each piece of data – .bonsoir. For example, if there was a file named 1.mp4 in your storage, it will change to 1.mp4.bonsoir as a result of infection.

Developers of the virus claim their instructions to be the only solution towards restoring your files. One of the victims actually emptied his pockets and bought the decryption key imposed by extortionists. He, therefore, managed to recover his files with the provided key. Unfortunately, this method does not fit everybody because of the high amounts required by cybercriminals and the risk to be fooled by them. This is why our advice is to delete Bonsoir QNAP NAS Ransomware and try using legitimate utilities to access your data. Also, before we jump over to them, we have to announce an important note: Do not search for keys bought by other victims. This is because each key is often generated individually for specific sets of data. Using a key from another victim may simply corrupt your data and destroy the ability to restore it completely.

How Bonsoir QNAP NAS Ransomware infected your computer

The way ransomware infects data storage servers is not that sophisticated. Usually, this happens when users expose their port to public eyes. This can happen as a result of configuration errors that open port settings to an unprotected network. Then, there might be a window of possibility opened for cybercriminals to start implementing a brute-force attack on your device. After swindlers find a way to scan your port out and log into the system, they eagerly rush towards installing the malicious software. As a result of this, the consequences mentioned above become your worst nightmare, because the precious data is no longer accessible. To prevent further infections like these, you should be careful using such devices yourself. When it comes to local types of networks, it is important to have strong knowledge about security rules. In addition to that, we have to mention that ransomware is commonly distributed via e-mail spam, trojans, botnets, keyloggers, fake software cracking tools, updates, and so forth.

1. Download Bonsoir QNAP NAS Ransomware Removal Tool
2. Get decryption tool for .bonsoir files
3. Recover encrypted files with Stellar Data Recovery Professional
4. Restore encrypted files with Windows Previous Versions
5. Restore files with Shadow Explorer
6. How to protect from threats like Bonsoir QNAP NAS Ransomware

Bonsoir QNAP NAS Ransomware files:


!!! ALL YOUR FILES ARE ENCRYPTED !!!.TXT
{randomname}.exe


Bonsoir QNAP NAS Ransomware registry keys:

no information

How to decrypt and restore .bonsoir files

Use automated decryptors

Download Kaspersky RakhniDecryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .bonsoir files. Download it here:

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .bonsoir files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing of files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with Bonsoir QNAP NAS Ransomware and removed it from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore .bonsoir files

1. Download Stellar Data Recovery Professional.
2. Click Recover Data button.
3. Select type of files you want to restore and click Next button.
4. Choose location where you would like to restore files from and click Scan button.
5. Preview found files, choose ones you will restore and click Recover.

Using Windows Previous Versions option:

1. Right-click on infected file and choose Properties.
2. Select Previous Versions tab.
3. Choose particular version of the file and click Copy.
4. To restore the selected file and replace the existing one, click on the Restore button.
5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

1. Download Shadow Explorer program.
2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
3. Select the drive and date that you want to restore from.
4. Right-click on a folder name and select Export.
5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

1. Login to the DropBox website and go to the folder that contains encrypted files.
2. Right-click on the encrypted file and select Previous Versions.
3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like Bonsoir QNAP NAS Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

ZoneAlarm Anti-Ransomware Dashboard

ZoneAlarm Anti-Ransomware Alert

ZoneAlarm Anti-Ransomware Blocked

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

2. Back up your files

As an additional way to save your files, we recommend online backup. Local storages, such as hard drives, SSDs, flash drives, or remote network storages can be instantly infected by the virus once plugged in or connected to. Bonsoir QNAP NAS Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.