Krypton Ransomware

Also Known As: Krypton virus
Distribution: Low
Damage level: Severe

Krypton ransomware removal instructions

What is Krypton?

First discovered by malware security researcher, Karsten Hahn, Krypton is a ransomware-type virus that stealthily infiltrates the system and encrypts data. During encryption, Krypton adds the ".kryptonite" appendix to the name of each encrypted file. For example, "sample.jpg" is renamed to "sample.jpg.kryptonite". Once files are encrypted, Krypton changes the desktop wallpaper ("krypton.png" is placed on the desktop), creates a text file ("KRYPTON_RANSOMWARE.txt", placed in all existing folders), and opens a pop-up window.

The desktop wallpaper and pop-up window contain similar messages informing victims of the encryption and demanding a ransom payment. It is currently unknown which cryptography (symmetric/asymmetric) Krypton uses. This information is not specified, however, decryption requires a unique key. Criminals store these keys on a remote server, allowing them to make ransom demands for their release. Although the wallpaper states that the cost of a key is $150, the pop-up states $300. Therefore, it is not certain which is correct, Victim are instructed to pay using the Bitcoin cryptocurrency, which must be submitted within one week, otherwise decryption becomes impossible (criminals probably delete the keys). In addition, the new text file contains a number of obscenities. Furthermore, the malware encrypts only files placed only in "test.Krypton" folder, which is created on the desktop. Therefore, there is a high probability that Krypton is still in development and/or being tested. A full version will probably be released imminently. Despite the threats and demands, never attempt to contact cyber criminals. Research shows that many ransomware developers ignore victims, after the ransoms are paid. Paying typically gives no positive results - you will simply be scammed. As well as losing your money, you will support cyber criminals' malicious businesses. Therefore, never attempt to contact these people or pay any ransom. Unfortunately, there are no tools capable of decryption of files compromised by Krypton and you can only restore everything from a backup.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Krypton decrypt instructions

Although Krypton is in development, it shares many similarities with tens of other ransomware-type viruses such as Leon, SERVER, TripleM, Tastylock, and many others. Although these viruses are developed by different cyber criminals, they have identical behavior - all encrypt data and make ransom demands. In most cases, the only major differences are size of ransom (which typically fluctuates between $500 and $1500) and type of encryption algorithm used, however, most of these viruses employ algorithms (for instance, RSA, AES, etc.) that generate unique decryption keys. Therefore, unless the malware is still in development or has certain bugs/flaws (e.g., the key is hard-coded, stored locally, or similar), restoring files without involvement of developers (contacting these people is not recommended) is impossible. Ransomware is one of the main reasons for maintaining regular data backups, however, backup files must be stored on a remote server (for instance, Cloud) or an unplugged external storage. If not, ransomware encrypts them as well.

How did ransomware infect my computer?

To proliferate ransomware-type viruses, criminals typically employ spam emails, fake software update tools, third party software download sources, and trojans. Spam emails often contain malicious attachments (e.g., MS Office documents, JavaScript files, etc.) Once opened, these files stealthily download and install malware. Fake updaters exploit outdated software bugs/flaws to infect the system. Torrents, eMule, freeware download websites, free file hosting websites, and other unofficial download sources, present malicious executables as legitimate software. In doing so, they trick users into downloading and installing malware. Trojans are the simplest ones - they merely open "backdoors" for malware to infiltrate the system. Essentially, the main reasons for computer infections are poor knowledge and careless behavior.

Threat Summary:
NameKrypton virus
Threat TypeRansomware, Crypto Virus, Files locker
SymptomsCan't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Distribution methodsInfected email attachments (macros), torrent websites, malicious ads.
DamageAll files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection.

To eliminate Krypton virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

The key to computer safety is caution. Therefore, to prevent this situation be very cautious when browsing the Internet. Never open files received from suspicious email addresses. In fact, delete these emails without reading. It is also recommended that you download software only from official developers, using a direct download link (third party downloaders/installers often include unnecessary/rogue software). Furthermore, keep installed software updated and use a legitimate anti-virus/anti-spyware suite. Bear in mind, however, that criminals proliferate malware via fake updaters. Therefore, use implemented update functionality or a tool provided by the official developer.

Text presented in Krypton ransomware pop-up:

What has happened?
Sorry for the inconvenience, but your computer has been infected with KryptonRansom (
All your personal files are encrypted and cannot be used or accessed, you have 168 hours (1 Week) to pay fine
$300 to 1364J1RCXfW3gNrGQXP481661MhaNi7Nqq, if the time limit (168 Hours) is exceeded then your files will be deleted FOREVER! Restarting the PC wont do anything, safe mode is useless aswell. Dont try anything funny, this is a ransomware. If you remove this window your files will be deleted!

What is Bitcoin (BTC)?
We only accept Bitcoin, Bitcoin is a cryptocurrency. Think of it as money you can't touch.
How do I get Bitcoin? There are two major ways to get your hands on bitcoin. The fastest and easiest method is by buying bitcoin. Links to buy bitcoin will be down below. The other method is to mine Bitcoin by solving complicated algorithms. We will only give you 1 week (168 Hours) so that option is out of range. You will need to store your bitcoin somewhere. For that you will need a wallet. Here's a couple of examples: Electrum, Jaxxm mSIGNA, Blockchain, ArcBit etc. We ONLY accept bitcoin to ensure our safety and your safety stays at top. You wll send the bitcoins to the address above.

Screenshot of Krypton desktop wallpaper:

Krypton wallpaper

Screenshot of files encrypted by Krypton (".kryptonite" extension):

Files encrypted by Krypton

Krypton ransomware removal:

Instant automatic removal of Krypton virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Krypton virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Krypton virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Krypton ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Krypton ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Krypton are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Krypton, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Krypton ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Krypton ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Krypton virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Krypton virus on your mobile device.
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