Jamper ransomware (Recovery Instructions Included) - Virus Removal Guide

Jamper virus Removal Guide

What is Jamper ransomware?

Jamper ransomware – malware which accepts Bitcoin payments in exchange for decryption software

Jamper ransomware virusJamper ransomware is a file locking infection which adds the .jamper appendix to all encrypted objects

Jamper ransomware is a dangerous malware form which was lately discovered by a computer researcher named Michael Gillespie. This file-encrypting threat affects Windows computers by injecting rogue registry keys and running malicious processes. These actions allow Jamper virus to launch the encryption code and block all files that are found on the targeted device. Later on, all affected data appears with the .jamper extension and an informative —README—.TXT message bombards the computer screen. Ransomware[1] developers threaten users that their files are locked and can be recovered only by purchasing the decryption key from the crooks. These criminals, as most of the hackers, urge for Bitcoin as such transfers always remain secret and untrackable. Moreover, these people provide some contact information for the victims: greenworksh@mail.com, and greenworksh@countermail.com email addresses.

Name Jamper
Category Ransomware
Extension .jamper
Ransom note —README—.TXT
Price The ransom price often varies from $500 to $1500 in BTC
Encryption code AES cryptography
Emails greenworksh@mail.com, and greenworksh@countermail.com
Distributing Spam messages and infected payload are the main ransomware distribution sources
Detecting Find malicious content in your Windows system with FortectIntego

Jamper ransomware is known as a data locker which uses AES cryptography[2] to execute the unique code and encrypt all files that are found on the infected Windows computer system. Once data is blocked, users are not capable of accessing the information properly anymore. Once tried to open, the file usually appears broken or does not launch at all.

Continuously, the cybercrooks who spread .jamper files virus store both encryption and decryption keys on remote servers which are accessible only for the owners themselves. However, this does not mean that you should make fast decisions and instantly pay the cybercriminals, otherwise, files will be lost forever as claimed in the ransom message:

All your important files are encrypted
There is only one way to get your files back: contact with us, pay, and get decryptor software.
We accept Bitcoin
You have Your personal identifier, write it in letter when contact with us.
Also you can decrypt 1 file for test, its guarantee what we can decrypt your files.

Do not rename encrypted files.
Do not try to decrypt using third party software, it may cause permanent data loss.
For decrypt your data write to email
Contact information:

As an alternative, we recommend trying some data recovery software which might appear to be helpful and let you restore some of your important locked files. However, first, you need to remove Jamper virus and all malware-related content from the system which can be detected by anti-malware programs such as FortectIntego or SpyHunter 5Combo Cleaner.

You need to take fast actions against the file-locking malware and perform the Jamper ransomware removal as soon as possible. Such malware sometimes comes with several hazardous and damaging features. For example, ransomware might also be capable of installing other dangerous computer viruses on the system or running infected payload in different locations.

Additionally, Jamper ransomware might be capable of bypassing the computer's security programs which allows it to freely distribute on the entire system. Nevertheless, this file-encrypting threat might be capable of launching a module which collects sensitive information about the user. All these malicious activities might renew themselves with each computer boot if the virus has not been terminated correctly.

Jamper ransomwareJamper ransomware is a malicious threat which urges Bitcoin in exchange for the file decryption tool

Cautiousness is the main key to computer security

It does not matter if you have an antivirus program or not if you do not take care of it properly. Antivirus software is truly a helpful option to avoid possible malware infections and keep your computer system always clean. However, you will need to perform regular updates once in a while to make sure that the program functions properly.

Continuously, according to technology experts from the LosVirus.es page,[3] ransomware distribution is related to email spam campaigns. Be aware that crooks might drop messages claiming that they are from official organizations and are writing for very important purposes. Investigate the letter before opening any clipped attachments.

Other ransomware spreading sources can be:

  • Peer-to-peer networks.[4]
  • Infected downloading hyperlinks.
  • Malicious ads.
  • Malware-related software.

Jamper ransomware should be removed with automatical tools only

If you are looking for ways to get rid of the dangerous ransomware infection, you have come to the right place. First, you need to gain some basic knowledge in the Jamper ransomware removal process. Note that, manual elimination is not a possibility in this case and you will need to lean on the protection of anti-malware software.

Before you remove Jamper virus from your Windows computer, you need to find all malicious components that are hidden in different locations of the system. For such purpose, we recommend users installing and launching specific programs such as FortectIntego, SpyHunter 5Combo Cleaner, or Malwarebytes. After that, check out some data recovery purposes that are presented and detailed below this text.

do it now!
Fortect Happiness
Intego Happiness
Compatible with Microsoft Windows Compatible with macOS
What to do if failed?
If you failed to fix virus damage using Fortect Intego, submit a question to our support team and provide as much details as possible.
Fortect Intego has a free limited scanner. Fortect Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Fortect, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

Getting rid of Jamper virus. Follow these steps

Manual removal using Safe Mode

Use these guidelines to activate Safe Mode with Networking on your Windows machine. This feature will allow you to disable the activities of Jamper ransomware:

Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.

Step 1. Access Safe Mode with Networking

Manual malware removal should be best performed in the Safe Mode environment. 

Windows 7 / Vista / XP
  1. Click Start > Shutdown > Restart > OK.
  2. When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. – it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
  3. Select Safe Mode with Networking from the list. Windows 7/XP
Windows 10 / Windows 8
  1. Right-click on Start button and select Settings.
  2. Scroll down to pick Update & Security.
    Update and security
  3. On the left side of the window, pick Recovery.
  4. Now scroll down to find Advanced Startup section.
  5. Click Restart now.
  6. Select Troubleshoot. Choose an option
  7. Go to Advanced options. Advanced options
  8. Select Startup Settings. Startup settings
  9. Press Restart.
  10. Now press 5 or click 5) Enable Safe Mode with Networking. Enable safe mode

Step 2. Shut down suspicious processes

Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:

  1. Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
  2. Click on More details.
    Open task manager
  3. Scroll down to Background processes section, and look for anything suspicious.
  4. Right-click and select Open file location.
    Open file location
  5. Go back to the process, right-click and pick End Task.
    End task
  6. Delete the contents of the malicious folder.

Step 3. Check program Startup

  1. Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
  2. Go to Startup tab.
  3. Right-click on the suspicious program and pick Disable.

Step 4. Delete virus files

Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:

  1. Type in Disk Cleanup in Windows search and press Enter.
    Disk cleanup
  2. Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
  3. Scroll through the Files to delete list and select the following:

    Temporary Internet Files
    Recycle Bin
    Temporary files

  4. Pick Clean up system files.
    Delete temp files
  5. You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter):


After you are finished, reboot the PC in normal mode.

Remove Jamper using System Restore

Activating System Restore is also an option if you want to disable the malicious cyber threat. Follow these instructions if you need help with this method:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt
    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Jamper. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with FortectIntego and make sure that Jamper removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Jamper from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

.jamper files is a sign that Jamper ransomware has occupied your Windows computer system and encrypted all objects found. Rather than paying the ransom price and risking to get scammed, we offer to try some data recovery tips that are provided below.

If your files are encrypted by Jamper, you can use several methods to restore them:

Use the Data Recovery Pro tool if you want to restore some important files of yours:

This method might appear to be very helpful if you use the tool exactly as shown in the instructing guide.

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Jamper ransomware;
  • Restore them.

The Windows Previous Versions feature is a tool for data restoring:

Complete each step as carefully as possible to reach the best results. Note that, this method might not work properly if you did not activate the System Restore function before the cyber attack took place on your computer.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

Try using Shadow Explorer to recover files:

If the ransomware virus did not eliminate your files' Shadow Copies, you should give this data recovery method a try.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Currently, computer experts are working on Jamper ransomware official decryption key.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Jamper and other ransomwares, use a reputable anti-spyware, such as FortectIntego, SpyHunter 5Combo Cleaner or Malwarebytes

How to prevent from getting ransomware

Stream videos without limitations, no matter where you are

There are multiple parties that could find out almost anything about you by checking your online activity. While this is highly unlikely, advertisers and tech companies are constantly tracking you online. The first step to privacy should be a secure browser that focuses on tracker reduction to a minimum.

Even if you employ a secure browser, you will not be able to access websites that are restricted due to local government laws or other reasons. In other words, you may not be able to stream Disney+ or US-based Netflix in some countries. To bypass these restrictions, you can employ a powerful Private Internet Access VPN, which provides dedicated servers for torrenting and streaming, not slowing you down in the process.

Data backups are important – recover your lost files

Ransomware is one of the biggest threats to personal data. Once it is executed on a machine, it launches a sophisticated encryption algorithm that locks all your files, although it does not destroy them. The most common misconception is that anti-malware software can return files to their previous states. This is not true, however, and data remains locked after the malicious payload is deleted.

While regular data backups are the only secure method to recover your files after a ransomware attack, tools such as Data Recovery Pro can also be effective and restore at least some of your lost data.

About the author
Ugnius Kiguolis
Ugnius Kiguolis - The mastermind

If this free guide helped you and you are satisfied with our service, please consider making a donation to keep this service alive. Even a smallest amount will be appreciated.

Contact Ugnius Kiguolis
About the company Esolutions