How to remove Robaj Ransomware and decrypt .Robaj files

What is Robaj Ransomware

Robaj Ransomware is a type of malicious software that belongs to the Conti ransomware family. This ransomware encrypts all the data on a victim’s computer, including photos, text files, excel tables, audio files, videos, and more, rendering them inaccessible without a decryption key. Once Robaj ransomware infects a computer, it appends a specific extension to the filenames of the encrypted files. This extension is .Robaj. For example, a file originally named photo.jpg would be renamed to photo.jpg.Robaj, and similarly, document.docx would become document.docx.Robaj. Robaj ransomware uses strong encryption algorithms to lock the files on the infected computers. The exact type of encryption—whether symmetric or asymmetric—is not specified in the sources, but given its association with the Conti family, it likely employs robust mechanisms to prevent unauthorized decryption. The ransomware drops a ransom note named readme.txt on the victim’s computer. This note informs the victim that their files have been encrypted and that they must pay a ransom in Bitcoin to recover their data. Interestingly, the ransom note does not specify the amount to be paid; it merely instructs the victim to contact the attackers via anonymous communication channels, which are not clearly defined in the note.

Currently, decrypting files affected by Robaj ransomware without the decryption key provided by the cybercriminals is extremely challenging, if not impossible. The general advice for dealing with ransomware infections includes:

• Do not pay the ransom: Paying the ransom does not guarantee the recovery of encrypted files and further encourages the perpetrators.
• Remove the ransomware: Use a reputable anti-malware tool to remove the ransomware from the computer to prevent further encryption.
• Restore from backups: If backups were maintained and are available, files can be restored from them after ensuring they are not infected.
• Seek professional help: Consulting with cybersecurity professionals who specialize in data recovery might provide some recourse, although success is not guaranteed.

As of the latest updates, there are no specific decryption tools available for Robaj ransomware on major platforms like No Ransom by Kaspersky. This lack of decryption tools highlights the difficulty in dealing with this particular ransomware variant.

How Robaj Ransomware infects computers

Robaj ransomware can infect computers through several methods, the most common being email spam, Trojan injections, and peer-to-peer file transfers. Email spam often includes emails that mimic legitimate notifications from utility services, delivery agencies, or internet providers but contain malicious attachments. Trojan injections involve misleading files that appear legitimate, such as software installers or updates, which, when executed, release the ransomware into the system. Peer-to-peer file transfer methods, like BitTorrent or eMule, are also risky as they rely heavily on trust, and files downloaded could be disguised as something else.

1. Download Robaj Ransomware Removal Tool
2. Get decryption tool for .Robaj 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 Robaj Ransomware

Robaj Ransomware files:


readme.txt
{randomname}.exe


Robaj Ransomware registry keys:

no information

How to decrypt and restore .Robaj files

Use automated decryptors

Download Kaspersky RakhniDecryptor

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

Download RakhniDecryptor

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 .Robaj 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 Robaj 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 .Robaj 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.

Download Stellar Data Recovery Professional

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 Robaj Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

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.

Download ZoneAlarm Anti-Ransomware

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. Robaj 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.

Download MailWasher Pro