A ransomware virus has been spotted to attack primarily Czech speaking users, according to malware researchers. It is dubbed Czech ransomware and uses the ??? file extension which it appends to the files encrypted by it. The affected files by Czech ransomware are appended an AES-256 encryption algorithm, one of the several military grade encryptions, for which at this stage a direct solution may take a lot of time. Czech ransomware demands users to pay the sum of 200 Czech krona which is approximately 9 USD via a Paysafe card to get their files back. This is yet another ransomware specifically oriented towards a nation. Infected users by the Czech virus are advised not to pay any ransom money and read this article to learn more about what this malware does and how to remove it and try to restore the encrypted files.
|Short Description||Encrypts widely used files on the compromised computer with an AES-256 encryption and asks for 200 Czech Kronas for decryption.|
|Symptoms||Adds the ??? file extension and the above posted picture.|
|Distribution Method||Spam Emails, File Sharing Networks, Executable Files|
|Detection Tool|| See If Your System Has Been Affected by malware |
Malware Removal Tool
|User Experience||Join Our Forum to Discuss Czech Ransomware.|
|Data Recovery Tool||Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.|
Czech Ransomware Virus – How Does It Spread
To infect the maximum amount of users, Czech ransomware may use a spam oriented towards Czech speaking users. The spam may be via e-mail and may carry either a malicious URL or attachment with the opening of both leading to infection. This all looks primitive and simple, but it is not. The malware writers behind Czech crypto-virus have focused on making this malware to be undetected and widespread, and this is a huge investment of tools and spamming services they may have used to fool the antivirus of most computers.
Czech Crypto Virus – Detailed Description
Once the virus file enters your device, it may drop the payload of Czech ransomware in the following Windows folders:
- %User’s Profile%
The Czech ransomware may also modify the following registry keys to run everytime Windows boots:
The Czech ransomware’s encryption process includes the modification of the code of the files and it’s replacement with the highly sophisticated and strong AES-256 encryption algorithm, decryption for which is not available unless there is a bug in the malware and researchers exploit it or the decryption key is known.
Czech ransomware looks for different types of files to encrypt, including:
- Audio files.
- Database files.
- Files associated with Microsoft Office.
- Adobe Reader files.
- Files used by widely downloaded programs that are well known.
After detecting the files, Czech ransomware begins the encryption process. The encrypted files are appended the ???, extension that may either be in front of them or after their original extension, for example:
After encryption, the file icon is removed, and Windows does not recognize the original type of software used to open this file. The Czech ransomware then drops the following ransom note:
→“Váš počítač a vaše soubory byly uzamknuty!
Co se stalo?
Veškeré vaše soubory byly zašifrovány šifrovacím algoritmem AES-256 společně s vaším osobním počítačem.
Pokud nesplníte všechny dané požadavky uvedené níže do 2 DNÍ, váš dešifrovací klíč se SMAŽE a vy své soubory a ÚČTY NIKDY NEUVIDÍTE.
Jak získat klíč?
– Stačí zakoupit kartu PaySafe Card v hodnotě 200Kč ,zadat její kód (číslo) do textového pole pod tímto textem a stisknout zelené tlačítko.
Vaše platba pak bude odeslána k ověření. Po ověření budou vaše soubory a váš počítač uvedeny do původního stavu.
– Kde koupím PaySafe Card?
PaySafe Card se dá zakoupit v jakékoliv trafice, či pumpě. Stačí se zeptat prodejce.”
Remove Czech Ransomware and Restore ??? Encrypted Files
In case you have decided to fight this threat on your own instead of paying the ransom, we recommend removing it and then attempting to decrypt your files. One method to remove Czech ransomware is to follow the removal instructions below. Malware researchers strongly advise users to use an advanced anti-malware program for best removal results, since Czech ransomware may situate multiple objects that are concealed in various places.
To try and restore files that have been encrypted by Czech ransomware, please make sure to check the alternative solutions in step “Restore file encrypted by Czech Ransomware” below.
- Guide 1: How to Remove Czech Ransomware from Windows.
- Guide 2: Get rid of Czech Ransomware from Mac OS X.
- Guide 3: Remove Czech Ransomware from Google Chrome.
- Guide 4: Erase Czech Ransomware from Mozilla Firefox.
- Guide 5: Uninstall Czech Ransomware from Microsoft Edge.
- Guide 6: Remove Czech Ransomware from Safari.
- Guide 7: Eliminate Czech Ransomware from Internet Explorer.
How to Remove Czech Ransomware from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove Czech Ransomware
Step 2: Uninstall Czech Ransomware and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it.
Step 3: Clean any registries, created by Czech Ransomware on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by Czech Ransomware there. This can happen by following the steps underneath:
Get rid of Czech Ransomware from Mac OS X.
Step 1: Uninstall Czech Ransomware and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove Czech Ransomware via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove malware from your Mac
When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove Czech Ransomware from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase Czech Ransomware from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall Czech Ransomware from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove Czech Ransomware from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Czech Ransomware will be removed.
Eliminate Czech Ransomware from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.