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|
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|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 on Mac OS X.
- Guide 3: Remove Czech Ransomware in 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.
- Guide 8: Disable Czech Ransomware Push Notifications in Your Browsers.
About the Czech Ransomware Research
The content we publish on SensorsTechForum.com, this Czech Ransomware how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific, adware-related problem, and restore your browser and computer system.
How did we conduct the research on Czech Ransomware?
Please note that our research is based on independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware, adware, and browser hijacker definitions.
Furthermore, the research behind the Czech Ransomware threat is backed with VirusTotal https://www.virustotal.com/gui/home/upload.
To better understand this online threat, please refer to the following articles which provide knowledgeable details.
1.Browser Redirect – What Is It?
2.Adware Is Malicious, and It Uses Advanced Techniques to Infect
3.The Thin Red Line Between Potentially Unwanted Programs and Malware
4.The Pay-Per-Install Affiliate Business – Making Millions out of Adware
5.Malicious Firefox Extensions Installed by 455,000 Users Blocked Updates
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:
1. Open the Run Window again, type "regedit" and click OK.
2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.
3. You can remove the value of the virus by right-clicking on it and removing it.
Step 4: Scan for Czech Ransomware with SpyHunter Anti-Malware Tool
1. Click on the "Download" button to proceed to SpyHunter's download page.
2. After you have installed SpyHunter, wait for it to update automatically.
3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.
4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.
Video Removal Guide for Czech Ransomware (Windows).
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:
2. Find Activity Monitor and double-click it:
3.In the Activity Monitor look for any suspicious processes, belonging or related to Czech Ransomware:
4.Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.
5.In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Czech Ransomware. If you find it, right-click on the app and select “Move to Trash”.
6: Select Accounts, after which click on the Login Items preference.
Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Czech Ransomware. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.
7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:
- 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:
1: Click on "Go" and Then "Go to Folder" as shown underneath:
2: Type in "/Library/LauchAgents/" and click Ok:
3: Delete all of the virus files that have similar or the same name as Czech Ransomware. If you believe there is no such file, do not delete anything.
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 Czech Ransomware files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as Czech Ransomware, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Video Removal Guide for Czech Ransomware (Mac)
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.
Remove Push Notifications caused by Czech Ransomware from Your Browsers.
Turn Off Push Notifications from Google Chrome
To disable any Push Notices from Google Chrome browser, please follow the steps below:
Step 1: Go to Settings in Chrome.
Step 2: In Settings, select “Advanced Settings”:
Step 3: Click “Content Settings”:
Step 4: Open “Notifications”:
Step 5: Click the three dots and choose Block, Edit or Remove options:
Remove Push Notifications on Firefox
Step 1: Go to Firefox Options.
Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":
Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”
Stop Push Notifications on Opera
Step 1: In Opera, press ALT+P to go to Settings.
Step 2: In Setting search, type “Content” to go to Content Settings.
Step 3: Open Notifications:
Step 4: Do the same as you did with Google Chrome (explained below):
Eliminate Push Notifications on Safari
Step 1: Open Safari Preferences.
Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".
Czech Ransomware FAQ
What is Czech Ransomware?
The Czech Ransomware threat is adware or browser redirect virus. It may slow your computer down siginficantly and display advertisements. The main idea is for your information to likely get stolen or more ads to appear on your device.
The creators of such unwanted apps work with pay-per-click schemes to get your computer to visit risky or different types of websites that may generate them funds. This is why they do not even care what types of websites show up on the ads. This makes their unwanted software indirectly risky for your OS.
What are the symptoms of Czech Ransomware?
There are several symptoms to look for when this particular threat and also unwanted apps in general are active:
Symptom #1: Your computer may become slow and has poor performance in general.
Symtpom #2: You have toolbars, add-ons or extensions on your web browsers that you don't remember adding.
Symptom #3: You see all types of ads, like ad-supported search results, pop-ups and redirects to randomly appear.
Symptom #4: You see installed apps on your Mac running automatically and you do not remember installing them.
Symptom #5: You see suspicious processes running in your Task Manager.
If you see one or more of those symptoms, then security experts reccomend that you check your computer for viruses.
What types of Unwanted Programs are there?
According to most malware researchers and cyber-security experts, the threats that can currently affect your Mac can be the following types:
- Rogue Antivirus programs.
- Browser hijackers.
- Fake optimizers.
What to do if I have a "virus" like Czech Ransomware?
Do not panic! You can easily get rid of most adware or unwanted program threats by firstly isolating them and then removing them from your browser and computer. One reccomended way to do that is by using a reputable malware removal software that can take care of the removal automatically for you. There are many anti-malware apps out there that you can choose from. SpyHunter is one of the reccomended anti-malware apps, that can scan your computer for free and detect any viruses, tracking cookies and unwanted adware apps and eliminate them quickly. This saves time when compared to doing the removal manually.
How to secure my passwords and other data from Czech Ransomware?
With few simple actions. First and foremost, it is imperative that you follow these steps:
Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.
Step 2: Change all of your passwords, starting from your e-mail passwords.
Step 3: Enable two-factor authentication for protection of your important accounts.
Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activiites with your card.
Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.
Step 6: Change your Wi-Fi password.
Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.
Step 8: Install anti-malware software with real-time protection on every device you have.
Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.
If you follow these reccomendations, your network and all devices will become significantly more secure against any threats or information invasive software and be virus free and protected in the future too.
More tips you can find on our website, where you can also ask any questions and comment underneath the articles about your computer problems. We will try to respond as fast as possible.