Severity scale:  
  (98/100)

Krypton ransomware. How to remove? (Uninstall guide)

removal by Lucia Danes - - | Type: Ransomware

Krypton ransomware threatens to delete your files permanently

Image of Krypton ransomware

Krypton is a dangerous ransomware virus that sneakily invades your machine, encrypts all your files. After encryption, this HiddenTear[1] based virus appends .kryptonite file extension to the targeted data and demands to pay the ransom in exchange for decryption software.

Krypton virus can affect a variety of popular files, including .doc, .exe, .xls, .jpg, .png, .gif, .mp3, .html and similar. Malware uses a sophisticated encryption algorithm to make files inaccessible by appending a specific file extension. Thus, after the attack, the file called “video.mpg” would be turned into “video.mpg.kryptonite.”

Following data encryption, malware places “KRYPTON_RANSOMWARE.txt” file into each folder that contains encrypted files, changes computer’s desktop picture and shows a pop-up message. The new wallpaper displays the following text:

All your files have been encrypted by Krypton Ransomware. Please pay 150$ USD in Bitcoin to us and we will decrypt your files. Not paying after one week (168 hours) will result in a loss of all your files.

Additionally, the pop-up window called “KryptonRansom -v1.0.10.2” appears. It explains what happened to your system (ironically, it apologizes for the inconvenience caused) and how to pay ransom in bitcoin cryptocurrency. It will place a timer for 168 hours, which, upon expiration, would delete your files permanently.

However, the wallpaper states the ransom demand is 150$ while the pop-up – 300$. Hence, it is very unclear what the actual requirement is. Regardless, we highly advise you not to engage with these cybercriminals[2] as there is no guarantee that you will recover your files, even after paying the ransom.

Quite often, users are ignored and not provided with the promised decryption key. Hence, it is a waste of money and time. Additionally, it encourages hackers to create and distribute more ransomware.

Keep in mind that the only way to keep your data safe is to have an external backup source (like Cloud, for example). Hence, it is critical to back up your files regularly. If you have them, you can call yourself lucky because developers of the Krypton cannot cause you any harm. Otherwise, you are in trouble.

Unfortunately, there is no official software which would decrypt your files at the moment. However, at the end of the article, you can find our alternative suggestions that might help you to get back at least some of your files. But you should try them after Krypton removal.

In order to remove Krypton entirely, you have to uninstall the virus and all files or programs related to it using reputable and professional malware removal software. We recommend completing task using Reimage. However, you can choose your preferred software as well.

Stealthy virus spreads in various ways

There are many different ways ransomware can invade victims’ computer. Most common source for such infection is through spam e-mails. Users tend to be very careless when it comes to computer safety. Therefore, victims open the malicious e-mail and click on the attached file (various file types can be used, such as .doc, .xls, .txt, .zip and many others). To avoid that, users should always be vigilant while going through their mailbox.

Peer-to-peer (P2P) networks can be potentially dangerous as hackers might upload their virus as a file which might seem like free software, a security team from lesvirus.fr[3] say. Therefore it is highly recommended avoiding third-party websites and only download software from official sites.

Additionally, fake updates and redirects can lead to ransomware infection. Therefore, we advise always downloading updates from official sources and be alert when being redirected to a third-party website. You should leave the suspicious websites immediately.

Krypton virus removal and file recovery

The very first step after the cyber attack is to remove Krypton virus from your machine. Afterwards, you can proceed with file recovery.

The Krypton ransomware is a severe infection so you should NOT try eliminating it manually. Please be aware that manual Krypton removal requires an in-depth knowledge of system files and registries. Otherwise, accidental Windows system files deletion could lead to permanent computer damage.

To proceed with Krypton ransomware removal, make sure you run a full system scan using Reimage or similar anti-malware software. Please be aware that ransomware virus might block the software to protect itself from deletion. Hence, you should use one of your guides which explains how to deal with this problem.

Once you delete Krypton, please proceed with the file recovery. As mentioned above, there is no official software capable of decrypting your files, but we suggest you some alternative ways which might help if you do not have backups.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. 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.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Malwarebytes.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove Krypton virus, follow these steps:

Remove Krypton using Safe Mode with Networking

Rebooting the computer to Safe Mode with Networking can help to disable the virus and run automatic removal smoothly.

  • 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 Krypton

    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 Krypton removal.

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

Remove Krypton using System Restore

System Restore can also help to disable the virus and perform its elimination.

  • 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 Krypton. 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 Krypton removal is performed successfully.

Bonus: Recover your data

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

If you do not have data backups, your chances to get back encrypted data are not high. However, you should still not pay the ransom, try the additional software and wait for the official decryptor to be released soon.

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

Data Recovery Pro – third-party tool that might restore some of the lost data

This professional software might help to restore some of the files encrypted by Krypton ransomware. However, it's not an official decryptor, so you should not expect full data recovery.

  • 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 Krypton ransomware;
  • Restore them.

Windows Previous Versions feature might help to recover the most important files

If System Restore was enabled before the cyber attack, you can copy individual versions of files by following these steps:

  • 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 ShadowExplorer if malware left Shadow Volume Copies untouched

In order to use ShadowExplorer for data recovery, you have to make sure that Krypton did not delete Shadow Volume Copies of the targeted data.

  • 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.

The official Krypton decryptor is not released yet.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Krypton and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Lucia Danes
Lucia Danes - Virus researcher

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References