How to remove Kasper Ransomware and decrypt .kasper files

What is Kasper Ransomware

Kasper Ransomware is a type of malicious software that encrypts files on a victim’s computer, demanding a ransom for their decryption. When this ransomware infiltrates systems, it encrypts files and appends them with the .kasper extension, significantly altering their format and rendering them inaccessible until decrypted. For instance, a file named document.docx would be renamed to document.docx.EMAIL=[kasperskyrans@gmail.com]ID=[unique_ID].kasper. The encryption employed by Kasper is typically strong, often leveraging sophisticated algorithms that are nearly impossible to crack without the appropriate decryption key. After encrypting the files, Kasper generates a ransom note, usually titled README kasper.txt, which is placed in several directories across the system. This note contains instructions on how to contact the cybercriminals, typically listing email addresses and sometimes a Telegram ID, alongside a unique victim ID necessary for further communication.

Unfortunately, at this time, there are no publicly available decryption tools for victims of Kasper Ransomware. This is due to the complexity of the encryption methods it uses, which makes it extremely challenging for security researchers to develop a universal decryptor. While there are websites like No More Ransom that offer numerous decryptors for specific ransomware strains, Kasper has yet to be resolved in this manner. Victims are often cautioned against paying the ransom, as doing so does not guarantee that the attackers will provide the decryption key and may further encourage criminal activities. In the event of an attack, it’s crucial to disconnect the infected device from the network to prevent further spread and seek professional assistance in containing and investigating the incident. Regular data backups and robust security measures remain the most effective defenses against the detrimental effects of ransomware like Kasper.

How Kasper Ransomware infects computers

Kasper Ransomware infiltrates computers through a variety of deceptive methods, primarily exploiting human error and system vulnerabilities. Typically, it spreads via phishing emails that contain malicious attachments or links, masquerading as legitimate communication. Once the user opens these attachments or clicks on the links, the ransomware is executed, beginning the encryption of files. Additionally, Kasper can be distributed through malicious ads, compromised websites, or bundled with pirated software and cracking tools, which users might unknowingly download. It may also exploit software vulnerabilities, particularly in outdated systems, to gain unauthorized access. Furthermore, the ransomware can propagate through peer-to-peer networks and compromised external storage devices, making it crucial for users to exercise caution and maintain up-to-date security measures.

1. Download Kasper Ransomware Removal Tool
2. Get decryption tool for .kasper 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 Kasper Ransomware

Kasper Ransomware files:


README kasper.txt
{randomname}.exe


Kasper Ransomware registry keys:

no information

How to decrypt and restore .kasper files

Use automated decryptors

Download Kaspersky RakhniDecryptor

Use the following tool from Kaspersky called Rakhni Decryptor, that can decrypt .kasper 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 .kasper 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 Kasper 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 .kasper 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 Kasper 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. Kasper 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