How to remove BLASSA Ransomware and decrypt .blassa files

What is BLASSA Ransomware

BLASSA Ransomware is a type of malware that specifically targets the personal data of its victims, employing encryption techniques to render files inaccessible. Like many ransomware variants, it attacks individual files, appending the distinctive .blassa extension to each file’s original name. This extension signifies that a file has been encrypted and cannot be accessed without the correct decryption key. The ransomware employs robust military-grade encryption methods, making manual decryption attempts exceedingly difficult, if not impossible. Upon completing the encryption process, BLASSA generates a ransom note in the form of a text file. This file, named RESTORES_FILESDESKTOP-[random_string].txt, is strategically placed on the victim’s desktop. The note informs the victim of the encryption and demands a ransom payment of 400 USD in exchange for the decryption key. It also typically includes contact information for the attackers, discourages contacting authorities, and warns against altering the encrypted files.

Currently, there are no publicly available decryption tools for BLASSA Ransomware. The encryption algorithms used are sophisticated, and without a flaw in the malware’s design, decryption without the original key is virtually unattainable. Victims are often left with little choice but to restore their data from backups—if available—or risk paying the ransom with no guarantee of receiving the decryption key. It is critical to emphasize that paying the ransom does not guarantee file recovery, as these cybercriminals may not provide the necessary decryption tool even after payment. The most effective counteraction remains preventive measures, such as regularly updating backups in multiple secure locations, including cloud storage and external offline devices. Those afflicted by .blassa file encryption are advised to consult websites like No More Ransom for any emerging tools, yet be prepared for the possibility that such files might remain inaccessible if no solution is found.

How BLASSA Ransomware infects computers

BLASSA Ransomware often infiltrates computers through deceptive tactics, primarily exploiting phishing and social engineering techniques. Cybercriminals craft malicious emails that appear legitimate, enticing users to open infected attachments or click on harmful links, which then initiate the ransomware download. These attachments can be in various forms, such as documents with macros, executables, or compressed files. Once executed, the ransomware silently encrypts files on the victim’s system, appending a “.blassa” extension to each compromised file. Additionally, drive-by downloads from untrusted websites or malvertising can unknowingly install the ransomware when users visit compromised web pages. It’s crucial for users to remain vigilant, only download files from reputable sources, and keep their security software updated to mitigate the risk of such infections.

1. Download BLASSA Ransomware Removal Tool
2. Get decryption tool for .blassa 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 BLASSA Ransomware

BLASSA Ransomware files:


RESTORES_FILESDESKTOP-[random_string].txt
{randomname}.exe


BLASSA Ransomware registry keys:

no information

How to decrypt and restore .blassa files

Use automated decryptors

Download Kaspersky RakhniDecryptor

Use the following tool from Kaspersky called Rakhni Decryptor, that can decrypt .blassa 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 .blassa files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing 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 BLASSA Ransomware and removed 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 .blassa files

1. Download Stellar Data Recovery Professional.
2. Click Recover Data button.
3. Select the type of files you want to restore and click Next button.
4. Choose the 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 a 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 are no items in the list, choose an alternative method.

Using Shadow Explorer:

1. Download Shadow Explorer program.
2. Run it, and you will see a 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 an 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 BLASSA 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 storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. BLASSA 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.