How to remove Jamper (Jumper) Ransomware and decrypt .jamper, .jumper or .SONIC files

What is Jamper Ransomware

Jamper Ransomware is a nasty file-encryption virus, that uses AES algorithm to encrypt your files and extorts a ransom of 1 to 3 BTC (Bitcoins). This malware is the successor of VegaLocker (Vega Ransomware) and predecessor of Buran Ransomware. Jamper Ransomware, depending on the version, may add .jamper, .jumper or .SONIC extensions to files it affects. After ransomware activity, your files become inaccessible and unreadable. Malware creates ransom note file called —README—.TXT after it finishes. In the text boxes below you can find ransom notes, created by different variation of the virus.

Jamper Ransomware does not bypass UAC, so users themselves grant an executable the permission to run. The virus uses the file marker V…………….., added to the beginning of the file code. After execution, removes itself and clears the system and application event logs, RDP log, PowerShell log, trusted certificates log. Jamper Ransomware removes shadow copies of files (VSS), disables recovery features of Windows, which makes it difficult to recover encrypted files. Ransomware modifies files of MS Office documents, OpenOffice, PDF, text files, databases, photos, music, video, image files, archives, etc. It does not encrypt the following types of files:

.bat, .cmd, .com, .cpl, .dll, .lnk, .msc, .msp, .pif, .scr, .sys, .vega

We do not recommend you to pay the ransom, because, usually, hackers don’t send any decryptors. Our recommendations can help you to recover at least some of the files encrypted by Jamper Ransomware. Perform instructions on this page to remove Jamper Ransomware and decrypt .jamper, .jumper or .SONIC files in Windows 10, 8/8.1, Windows 7.

1. Download Jamper Ransomware Removal Tool
2. Get decryption tool for .jamper, .jumper or .SONIC files
3. Recover encrypted files with Stellar Phoenix Data Recovery Pro
4. Restore encrypted files with Windows Previous Versions
5. Restore files with Shadow Explorer
6. How to protect from threats like Jamper Ransomware

Jamper Ransomware (ransom note)

UAC alert of Jamper Ransomware executable

How Jamper Ransomware infected your PC

The virus can be distributed by hacking through an unprotected RDP configuration, using email spam and malicious attachments, deceptive downloads, botnets, exploits, web injections, fake updates, repackaged and infected installers. Virus assigns certain ID with the victims, that is used to name those files and supposedly to send decryption key. In order to prevent infection with this type of threats in future we recommend you to use Norton Antivirus, SpyHunter 5, BitDefender or any reputable antivirus program.

How to remove Jamper Ransomware manually

It is not recommended to remove Jamper Ransomware manually, for safer solution use Removal Tools instead.

Jamper Ransomware files:


---README---.TXT
defender.exe
4B87836C.vega
F47E5E19.vega
{random}.exe


Jamper Ransomware registry keys:


HKEY_CURRENT_USER\Software\Vega\Service
Public = {base64 encoded data}
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Defender = %Application Data%\Firewall and Security.{GUID}\defender.exe


How to decrypt and restore .jamper, .jumper or .SONIC files

Use automated decryptors

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .jamper, .jumper or .SONIC 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.

If you are infected with Jamper 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 .jamper, .jumper or .SONIC 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 Jamper 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 vendor BitDefender released free tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. It will not conflict with bigger security applications. If you are searching complete internet security solution consider upgrading to full version of BitDefender Internet Security 2018.

2. Back up your files

Regardless of success of protection against ransomware threats, you can save your files using simple online backup. Cloud services are quite fast and cheap nowadays. There is more sense using online backup, than creating physical drives, that can get infected and encrypted when connected to PC or get damaged from dropping or hitting. Windows 10 and 8/8.1 users can find pre-installed OneDrive backup solution from Microsoft. It is actually one of the best backup services on the market, and has reasonable pricing plans. Users of earlier versions can get acquainted with it here. Make sure to backup and sync most important files and folders in OneDrive.

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

Malicious attachments to spam or phishing e-mails is 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 very high level of anti-spam protection.