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.java file extension ransomware. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Ransomware
12

.Java file extension virus is an updated version of Dharma ransomware

.java file extension ransomware image

Java ransomware is a version of the Dharma/Crysis malware family. This malicious program uses AES cryptography[1] and locks files with one of the different file extensions. These extensions might include victim’s ID number, contact email address, and .java suffix. Currently malware locks files with these extensions:

  • .[crazy.hamster@aol.com].java,
  • .id-[random numbers].java,
  • .[workup@india.com].java,
  • .[decrypthelp@qq.com].java,
  • .id-8.[sabantui@tutanota.com].java.

The files which are encoded by the .Java file virus are usually the most useful ones, e.g., business documents, scientific data, photos, video files, etc. So, there is no surprise why hackers are successful in collecting ransoms from PC users.

Following data encryption, Java virus drops a ransom note in FILES ENCRYPTED.TXT file. However, different versions of malware might name this text file differently. Though, the provided instructions remain the same:

All your files have been encrypted!
All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail sabantui@tutanota.com
Write this ID in the title of your message B8F053EC
In case of no answer in 24 hours write us to theese e-mails:udacha@cock.li
You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the decryption tool that will decrypt all your files.

As you can see from the abstract, victims are asked to contact cyber criminals via provided email address. However, Java ransomware virus is known for using a couple of different emails for communicating with victims:

  • sabantui@tutanota.com,
  • udacha@cock.li,
  • ecrypthelp@qq.com.

Developers of .Java virus seems to be generous and promise free decryption for 5 files as a guarantee that they actually have a working data recovery tool:

Free decryption as guarantee
Before paying you can send us up to 5 files for free decryption. The total size of files must be less than 10Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.)

However, security specialists do not recommend taking this offer and having business with cyber criminals. There is no guarantee that you will receive a needed decryption tool[2] once you transfer the demanded sum of Bitcoins.

For this reason, we suggest you to remove .java file extension ransomware virus and try to either recover files from backups or use alternative recovery tools such as official Rakhni decryptor (used to decrypt Dharma ransomware files.) This way you will avoid financial losses and protect your computer from further malware infiltration.

Start .Java removal by downloading a reputable security software, such as Reimage. The detailed instructions are provided at the end of this article to ensure that you perform ransomware elimination safely and without any complications. In spite of that, we kindly ask you to follow the guidelines carefully.

Emails from Tim Brooks spread ransomware virus

Researchers from ZonderVirus.nl[3] have spotted that the file-encrypting virus is distributed via malspam campaigns. The malicious attachments holding an executable of the ransomware are sent as fake invoices from a sales department. The sender of the message is named Tim Brooks. However, it is merely an attempt to make the email look genuine.

Therefore, many people were convinced that the letter came from a legitimate company and opened the infected attachment. As a result, the ransomware infiltrated the system and began its bogus activity. Note that the crooks might disguise the malware under receipts, banking statements or other vital documents.

Likewise, you should be extremely cautious when opening email letters.[4] If you get a receipt for a specific purchase, you do not recall making, do not open the message. Even accidental clicks might trigger an installation of various high-risk computer infections and lead to enormous financial losses.

Additionally, cybercriminals might hack into social media accounts[5] and deliver messages with infected links to the people on the friend list. Thus, if you receive a dubious text from your peer, contact him or her in person to make sure that their account is safe.

Remove .Java ransomware virus with reputable software

If your files are marked using [decrypthelp@qq.com].java or similar extension, you are dealign with the ransomware. To ensure safety of your remaining files, we highly recommend you to remove Java ransomware virus. This elimination method will take care of all malicious components that were installed on your computer by this malware. Then, you are welcome to proceed to the data recovery procedure. Remember that it is crucial to avoid fake decryptors and contact cyber criminals for their help since their only aim is to swindle the money from gullible people.

For Dharma Java ransomware removal we recommend using these programs: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware. We can assure you that these security tools are developed by IT professionals to help victims of ransomware attack get rid of malicious files and improve their system security. Additionally, do not forget to check the decryption steps attached at the end of this article. 

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If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall .java file extension ransomware. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
More information about this program can be found in Reimage review.
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Manual .java virus Removal Guide:

Remove .java using Safe Mode with Networking

To remove .java file extension virus with Safe Mode with Networking, follow instructions below:

  • 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 .java

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

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

Remove .java using System Restore

If the first method was not helpful, try to reboot your PC into Safe Mode with Command Prompt function to remove [decrypthelp@qq.com].java virus from your computer.

  • 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 .java. 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 and make sure that .java removal is performed successfully.

Bonus: Recover your data

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

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

Data Recovery Pro Tool

In case you are unable to access your files with .java extension, try to restore them with the help of this tool.

Windows Previous Versions Feature might help

Note that if you have previously enabled System Restore function on you computer, this feature might help you to retrieve the most important files.

  • 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”.

You should try ShadowExplorer

Firstly, check if the ransomware hasn't deleted Shadow Volume Copies from your system. If not, follow the instructions below.

  • 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.

Use Dharma Decryptor from Kaspersky Lab

Since .java ransomware might be inextricably linked to Dharma virus, you should definitely try to recover your data with the help of an official decryptor which you can find here.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from .java and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Julie Splinters - Malware removal specialist

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References

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