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Remove JSWorm ransomware (Virus Removal Instructions) - updated Jul 2019

removal by Julie Splinters - - | Type: Ransomware

JSWorm ransomware is malware based on money extortion, although some versions are decryptable

JSWorm ransomware JSWorm ransomware virus is the threat that delivers ransom message in an HTML window.

JSWorm ransomware is a cryptovirus that was first discovered in the wild in January 2019. It stems from GusCrypter malware family, whose goal is to encrypt all personal files on the system and require a ransom to be paid for their release. The virus was released under a few different versions, the latest of which is JSWORM v.3.0, which is the only version that remains not decryptable.

JSWorm ransomware uses the AES encryption algorithm[1] to lock up pictures, databases, documents, videos, music, etc. and appends .JSWORM extension at the end of each of the affected files. Additionally, the malware also drops a ransom note JSWORM-DECRYPT.html which explains that victims need to contact criminals via NIGER1253@COCK.LI email address if they want to recover their data.

Later versions incorporated a variety compound extensions the ended with .JSWORM, although crooks switched to .JURASIK appendix briefly. The email addresses, as it is typical, were changed as well (JSWORM v.3.0 uses email), although the ransom note name remained the same – JSWORM-DECRYPT.hta.

Name JSWorm ransomware
Type Cryptovirus
Category Ransomware
Versions JSWorm 2.0, JSWorm 3.0,  JSWorm 3.1
Ransom note JSWORM-DECRYPT.html 
File marker .JSWORM, .JURASIK
Distribution Spam email attachments
Decryptable? First and second variants can be decrypted. For JSWorm 2.0 ransomware, use decryptor from Emsisoft. Unfortunately, there is no decryption tool available for 3.0 and 3.1 versions
Elimination Use Reimage Reimage Cleaner Intego for JSWorm ransomware virus damage removal

Crooks behind JSWorm virus updated the virus code in versions 3.0 and 3.1, which has no decryptors available

Without a doubt, ransomware is now a lucrative business worth $2 billion.[2] For that reason, hackers behind major ransomware strains often continue improving their malware. In April  2019, threat actors released JSWorm 2.0 ransomware which worked identically to its predecessor. In May, crooks struck again with the second version, and the appended extension was changed to [ID-XXXXXXXXX][].JSWORM. Additionally, the ransom note was now in the text format and was named JSWORM-DECRYPT.txt.

As it turned out, the provided email address would not work, and crooks behind JSWorm virus would not be able to recover all the encrypted files even if they wanted to. Luckily, security researchers from Emsisoft[3] managed to crack the code of JSWorm 2.0 ransomware and released the decryption tool that would allow victims to recover files for free.

Since the release of Emsisoft's decrypter in May, hackers altered the code with the release of JSWorm 3.0 and 3.1 versions, which remain not decryptable currently. As it is typical, crooks ask for money in Bitcoin, although the price is unknown. However, users should avoid contacting criminals and avoid falling victims to a potential scam that would not only result in a file but also money loss.

JSWorm 3.0 and 3.1 ransom notes

Instead, users should perform JSWorm ransomware removal and then try alternative data recovery methods. Besides, once the code of particular ransomware family gets cracked, it is highly likely that later versions will be as well.

Files encrypted by JSWorm ransomware are not damaged but rather locked

The misconception about file locking viruses is that they corrupt the files, which is not true. The sophisticated encryption algorithm is used to encrypt them, which essentially puts a unique password on each of the files. To recover the data, users need a specific key that is generated during the encryption process and is sent to a remote server which only hackers has access to. 

During the encryption process, JSWorm ransomware makes use of AES algorithm to lock a variety of different files, such as:

  • photos;
  • documents;
  • archives;
  • audio files;
  • videos;
  • databases.

Although JSWorm ransomware cannot encrypt system files, it makes additional alterations on your system. Windows Registry values are changed, so ransomware is launched every time you restart your PC.[4] Additionally, Shadow Volume Copies are also deleted, which complicates data recovery. These changes are made before the virus starts file encryption so that it would not be interrupted during the process.

JSWorm ransomware virus.JSWorm file extension virus belongs to a ransomware category. That means you are demanded to pay up for your locked data.

JSWorm ransomware displays a ransom note in an HTML or HTA format that reads the following:




Email us
Write your ID at title of mail and country at body of mail and wait answer.
You have to pay some bitcoins to unlock your files!


If you try to unlock your files, you may lose access to them!

No one can guarantee you a 100% unlock except us!
How to buy bitcoin

You should remove JSWorm ransomware using trustworthy antivirus program as many researchers[5] advise. This is a crucial step that ensures your system is clear and prepared for data recovery. To repair ransomware-affected system files and fix virus damage, use Reimage Reimage Cleaner Intego or similar repair tools before file restoration processes.

JSWorm ransomware virus is one of the most dangerous cyber threats, and you may need additional help for the proper virus termination. Since this virus can alter the registry, you should enter the system in a Safe Mode with Networking, so anti-malware tools work correctly. We have prepared a few additional tips down below.

JSWorm 2.0 ransomware decryption tool and how to use it

JSWorm 2.0 ransomware was first spotted in April 2019, used a compound file extension [ID-XXXXXXXXX][].JSWORM and dropped a ransom note in a text format – JSWORM-DECRYPT.txt. This variant was prevalent in the US, Italy, France, Germany, Argentina, Brazil, Turkey, and a few other countries.

Fortunately, Emsisoft security researchers released a decrypter that can retrieve victims' files for free. To be able to decipher data with the said tool, you will have to make sure you still have the ransom note JSWORM-DECRYPT.txt, as it is required for decryption. You can find such a file in any folder that holds the locked data.

  1. Download the decrypt_JSWorm2.exe file from the official Emsisoft site
  2. Run the executable
  3. If User Account Control shows up, click Yes
  4. Agree to License Terms
  5. Once the program opens, click on Browse and locate the ransom note
  6. Click on Start
  7. The decryptor will show the key it detected
  8. Click OK and wait till the process finishes

Do not forget that you need to remove JSWorm 2.0 ransomware before you proceed with file recovery, as all the data would be encrypted repeatedly. JSWorm 2.0 ransomware decrypterJSWorm 2.0 ransomware is now decryptable with Emsisoft's decryption tool. Victims can now recover locked data for free.

Email spam campaigns are one of the most popular ransomware distribution techniques

Phishing[6] tactics can be used to infect devices with various cyber threats including ransomware. People get tricked that they received a legitimate email and when the attachment is opened malicious script launches the virus on your system directly. Infected documents or even direct links contain malicious macros, and you enable them with one click of the button.

Document files, presentations or databases attached to these emails contain the payload or direct malware. You can avoid getting these threats by scanning the file before opening and deleting suspicious emails from the box immediately. Any email from the company or service you are not using can be designed to infect your computer. Pay more attention to emails you get when you are not expecting them.

Use professional help for JSWorm ransomware elimination 

When you need to remove JSWorm ransomware from the system completely, employ a reputable and trustworthy anti-malware program or your antivirus tool. This step ensures that every cyber threat is eliminated from the system. You should also clean the virus damage or fix additional changes with tools like Reimage Reimage Cleaner Intego, SpyHunter 5Combo Cleaner pr Malwarebytes.

JSWorm ransomware encrypted filesAn example of JSWorm ransomware encrypted files.

However, JSWorm ransomware removal might get difficult when the system is altered further. For that, we offer you to reboot the device in Safe Mode before scanning the system thoroughly. This way your anti-malware program is performing properly.

If you still focusing on data recovery using file backups or data restoring software, make sure that the computer is clear after the .JSWorm virus termination. Ransomware can perform yet another round of encryption on your files if you restore them while the computer is still infected.

do it now!
Reimage Happiness
Intego Happiness
Compatible with Microsoft Windows Supported versions Compatible with OS X Supported versions
What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage 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 Reimage, 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.

To remove JSWorm virus, follow these steps:

Remove JSWorm using Safe Mode with Networking

For the best JSWorm ransomware removal results, reboot your PC in the Safe Mode with Networking and then scan the system using your antivirus:

  • Step 1: Reboot your computer to Safe Mode with Networking

    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 Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    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 Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove JSWorm

    Log in to your infected account and start the browser. Download Reimage Reimage Cleaner Intego or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete JSWorm removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove JSWorm using System Restore

When the device gets affected by malware, you can try System Restore feature:

  • 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 JSWorm. 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 Reimage Reimage Cleaner Intego and make sure that JSWorm removal is performed successfully.

Bonus: Recover your data

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

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

If you need an alternative for file backups, Data Recovery Pro can help you

Data Recovery Pro is the program that restores encrypted or accidentally deleted files on the computer

  • 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 JSWorm ransomware;
  • Restore them.

Windows Previous Versions — a feature that recovers files encrypted by JSWorm ransomware

When System Restore gets enabled, you can use Windows Previous Versions as an alternative for data backups and recover your locked data

  • 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”.

ShadowExplorer helps after JSWorm ransomware attack

When Shadow Volume Copies remain untouched by the virus, ShadowExplorer helps in data recovery

  • Download Shadow Explorer (;
  • 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.

Make use of Emsisoft JSWorm 2.0 decrypter

Download decrypter from Emsisoft for the official site:

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

Access your website securely from any location

When you work on the domain, site, blog, or different project that requires constant management, content creation, or coding, you may need to connect to the server and content management service more often. It is a hassle when your website is protected from suspicious connections and unauthorized IP addresses.

The best solution for creating a tighter network could be a dedicated/fixed IP address. If you make your IP address static and set to your device, you can connect to the CMS from any location and do not create any additional issues for server or network manager that need to monitor connections and activities. This is how you bypass some of the authentications factors and can remotely use your banking accounts without triggering suspicious with each login. 

VPN software providers like Private Internet Access can help you with such settings and offer the option to control the online reputation and manage projects easily from any part of the world. It is better to clock the access to your website from different IP addresses. So you can keep the project safe and secure when you have the dedicated IP address VPN and protected access to the content management system.

Backup files for the later use, in case of the malware attack

Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.

About the author
Julie Splinters
Julie Splinters - Malware removal specialist

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