THREAT REMOVAL

Remove CryptoJoker Ransomware. Recover .cryptojoker Files


This article aims to help all victims of CryptoJoker to remove the ransomware completely from the infected host and recover encrypted data without paying the ransom to cyber criminals.

A new version of CryptoJoker ransomware has been spotted by security researchers. It differs from the one that has been released in January last year. Now the threat renames corrupted files with the malicious extensions .partially.cryptojoker or .fully.cryptojoker depending on whether it partially or fully encrypts a file.

Encrypted files become unusable until the unique decryption key is applied to the ransomware decryptor. Hackers guide victims how to act further via a ransom note CryptoJoker Recovery Information.txt that is dropped on the system during the infection process. They demand victims to pay a ransom of €100 in Bitcoin in exchange for the decryption key. Keep reading and find out how to remove CryptoJoker ransomware efficiently from the computer so you can recover encrypted data.

Threat Summary

NameCryptoJoker
TypeRansomware
Short DescriptionThe ransomware encrypts files on your computer and displays a ransom message.
SymptomsThe ransomware will encrypt your files and put the extension .cryptojoker once their encryption is finished.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware

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Malware Removal Tool

User ExperienceJoin Our Forum to Discuss CryptoJoker.
Data Recovery ToolWindows 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.

Technical Details of CryptoJoker Ransomware Virus

CryptoJoker malware belongs to the most destructive group of computer viruses. It is a data locker ransomware that targets frequently used file types so that it can blackmail users into paying a ransom to get the files back.

First, CryptoJoker ransomware drops its payload on the system. The payload starts a malicious executable file named CryptoJoker.exe that triggers the infection process. In order to perform all malicious activities the ransomware may drop or create additional files which are likely to be situated in the following Windows folders:

  • %AppData%
  • %LocalAppData%
  • %ProgramData%
  • %Temp%
  • %System32%
  • %Windows%

Some of these files are usually designed to modify Run and RunOnce registry keys and ensure persistent threat presence on the PC. By adding new value strings to these keys, CryptoJoker crypto virus set an automatic start of its executable file whenever the Windows OS is switched on:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

Moreover, CryptoJoker uses Windows Registry Editor to display its ransom note automatically on the PC screen. The ransom note is dropped on the computer during the infection process, and it contains a message by CryptoJoker’s authors. The file is named CryptoJoker Recovery Information.txt and all it reads is:

Hello, my name is CryptoJoker !!
My name is CryptoJoker. I have encrypted all your precious files including images, videos, songs, text files, word files and e.t.c So long story short, you are screwed … but you are lucky in a way. Why is that ?? I am ransomware that leave you an unlimited amount of time to gather the money to pay me. I am not gonna go somewhere, neither do your encrypted files.
FAQ
1. Can i get my precious files back ??
Answer: ofcourse you can. There is just a minor detail. You have to pay to get them back.
2. Ok, how i am gonna get them back ?
Answer: You have to pay 100€ in bitcoin.
3. There isn’t any other way to get back my files ?
Answer: Nahhh.
4. Ok, what i have to do then ?
Answer: Simply, you will have to pay 100€ to this bitcoin address: *** . When time comes to send me the money, make sure to include your e-mail and your personal lD(you can see it bellow) in the extra information box (it may apper also as ‘Extra Note’ or ‘optional message’) in order to get your personal decryption key. It may take up to 6-8 hours to take your personal decryption key.
5. What the heck bitcoin is ?
Answer: Bitcoin is a cryptocurrency and a digital payment system. You can see more information here: https://en.wikipedia.org/wiki/Bitcoin . I recommend to use ‘Coinbase’ or ‘Bitcoin wallet’ as a bitcoin wallet, if you are new to the bitcoin-wallet. Ofcourse you can pay me from whatever bitcoin wallet you want, it deosn’t really matter.
6. Is there any chance to unclock my files for free ?
Answer: Not really. After 1-2 or max 3 years there is propably gonna be released a free decryptor. So if you want to wait … it’s fine. As i said, i am not gonna go somewhere.
7. What i have to do after getting my decryption key ?
Answer: Simple. Just press the decryption button bellow. Enter your decryption key you received, and wait until the decryption process is done.
Your personal ID: [HWID goes here]

The additional impact caused by CryptoJoker may be usage of the vssadmin delete shadows command that prevents data recovery by means of Shadow Volume Copies.

CryptoJoker Ransomware Virus Payload Distribution

Cyber criminals are always seeking for new ways to trick users into installing malware on their PC. Ransomware attacks like CryptoJoker usually use spam email campaigns for payloads delivery. Such emails generally impersonate legitimate sources like bank or government institutions, Internet providers, courier services and current or past employers. This approach aims to trick users into opening file attachment, clicking displayed button or following presented link without any doubt whether this action will harm their system or not. All these activities can deliver the CryptoJoker ransomware payload on the computer. And once it penetrates the system it can infect it.

Another way of delivery may be freeware programs and pirated content as well. Once hackers inject CrpytoJoker malicious code into an app or a torrent file, it comes bundled with the primary product without asking users for any additional installing permission.

CryptoJoker Ransomware Virus Data Encryption Process

CryptoJoker ransomware initiates a scan of all PC drives in order to find all file types that are predefined as targets in its data encryption list. Like its previous version CryptoJoker is likely to target the following file types:

.txt, .docx, .doc, .xls, .pdf, .java, .jpeg, .sql, .db, .docm, .odt, .csv, .xlsb, .xlsm, .aspx, .html, .psd, .pptx, .mdb, .sln, .xlsx

Whenever a file matches a value set in its list, CrptoJoker is likely to encrypt part of the original file code or the whole file with the AES-256 bit encryption algorithm. This encryption method is used by the previous version of the ransomware that has appeared in January 2016. The code analysis of new CryptoJoker version is in progress so it may be reprogrammed to utilize other cipher algorithms.

At the end of the encryption process, this new strain of CrptoJoker ransomware family appends double extension to the file names. The malicious extensions .fully.cryptojoker is used when the whole file is encoded while the .partially.cryptojoker file extensions rename data with partially corrupted code.

A unique decryption key that is generated during the encryption process is supposed to be useful for .cryptojoker data recovery. The key is possessed by hackers, so they demand € 100 in bitcoins ransom for it. However, beware that they may be bluff just to gain the money. On one hand, there is no guarantee that after ransom payment they will send the decryption key, on the other hand, the ransomware code may be broken in a way to generate useless keys that won’t restore .cryptojoker files.

Remove CryproJoker Ransomware and Restore .cryptojoker Files

For the sake of your security, it is always better to avoid any negotiations with cyber criminals and skip the ransom payment.

It is better to get rid of CryproJoker ransomware by removing all malicious files and objects created on the system. Then back up all encrypted files and attempt to restore .cryptojoker files with the help of alternative data recovery solutions. Follow the step-by-step removal guide below and cope with CryproJoker ransomware by yourself.

Have in mind that the complexity of ransomware code may make the removal of all malicious files and objects associated with CryptoJoker a challenging task even for tech savvy guys. If unsure, use the automatic option below and clean your system right away.

Milena Dimitrova

Milena Dimitrova

An inspired writer and content manager who has been with SensorsTechForum since the beginning. Focused on user privacy and malware development, she strongly believes in a world where cybersecurity plays a central role. If common sense makes no sense, she will be there to take notes. Those notes may later turn into articles! Follow Milena @Milenyim

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Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer

How to Remove CryptoJoker from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove CryptoJoker

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall CryptoJoker 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. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by CryptoJoker on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by CryptoJoker 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.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for CryptoJoker with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


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.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer

Get rid of CryptoJoker from Mac OS X.


Step 1: Uninstall CryptoJoker and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


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 CryptoJoker:

Tip: To quit a process completely, choose the “Force Quit” option.


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 CryptoJoker. 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 CryptoJoker. 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 CryptoJoker 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:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

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 CryptoJoker. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

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.



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Remove CryptoJoker 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.


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Erase CryptoJoker 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.



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Uninstall CryptoJoker 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.



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Remove CryptoJoker 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".

stf-safari preferences


Step 4: After that, select the 'Extensions' Tab.

stf-safari-extensions


Step 5: Click once on the extension you want to remove.


Step 6: Click 'Uninstall'.

stf-safari uninstall

A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the CryptoJoker will be removed.


How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.

Start Safari and then click on the gear leaver icon.

Click the Reset Safari button and you will reset the browser.


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Eliminate CryptoJoker 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.


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