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Remove CryptoJoker Ransomware and Restore .crjoker Files

A new ransomware has been detected to infect user PCs, encrypting sensitive files, called CryptoJoker. However, contradictory to its name the cyber-threat is not funny business at all. The ransomware variant has been outlined to infect files with multiple file extensions massively and encrypt them via a AES-256 bits encryption algorithm and the decryption may be possible only if there are holes in the decrypted file since it is very strong in bits. All users who have been infected should immediately disconnect from the internet and check whether or not they have backup. All users who have not been infected should back up their data to both an external drive and shadow volumes.

NameCryptoJoker Ransomware
TypeRansomware Trojan
Short DescriptionEncrypts user files, corrupting them hence making them impossible to be opened.
SymptomsUsers may witness a ransom note with instructions on how to pay and their files encrypted with the .crjoker extension. (ex. /filename/.jpg.crjoker)
Distribution MethodMalicious URLs, malicious email attachments
Detection ToolDownload Malware Removal Tool, to See If Your System Has Been Affected by CryptoJoker Ransomware
User ExperienceJoin our forum to follow the discussion about CryptoJoker Ransomware.
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.

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CryptoJoker – How Does It Spread

There are several ways by which this vile threat may be through malicious attachments in Spam e-mail messages. The Ransomware is distributed in near identical way most Trojan Horses are spread. CryptoJoker is reported to spread via several different documents and files, one of which was reported to be a .pdf document that may have been infected via a compilator. Users are advised also to keep their eyes peeled for any suspicious sites that they visit.

CryptoJoker Ransomware – How Does It Work?

Once activated on the user PC, the ransomware Trojan begins to deploy its payload files in the following locations:

%AppData%
%User%
%Temp%
%System%
%System32%
%Windows%

The payload modules may be of the following file formats:

.dll; .exe; .tmp; .dat; .bat; .vbs;

After they have been activated, the Trojan may perform different activities such as delete the Shadow Volume Copies of Windows, delete backups and modify the Windows Registry Editor. After this has been performed, the Trojan may begin to scan for the following file extensions:

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

After this process is complete the rasomware may encrypt either portion of the designated file or the whole file with a strong AES-256 bit encryption algorithm changing their extension to “.crjoker”.

The Ransomware leaves the following ransom note afterwards:

cryptojoker-ransomware-malicious-virus-message

The emails provided in the instructions by which the cyber criminals may be contacted for further ransom instructions and payment are file987@sigaint.org and file987@tutanota.com.

We strongly advise affected users by the CryptoJoker Ransomware NOT to pay the ransom money and to look for other ways to decrypt their data. This Is because paying the ransom may not be a guarantee that you will get your files restored and also it funds the cyber-criminal organization to further sophisticate their operation.

Removing CryptoJoker Ransomware Fully

In order to wipe this threat clean off, you need to isolate it first. This may happen in several different ways, the most accessible and fastest of which is if you boot your computer in Safe Mode. This will stop any third-party apps and processes from running and may allow you to scan your computer and eradicate all associated objects with CryptoJoker. For the removal itself it is recommended to use and advanced anti-malware program that will make sure there is not Trace of CryptoJoker and protect you from future intrusions.

1. Boot Your PC In Safe Mode to isolate and remove CryptoJoker Ransomware

1. Boot Your PC Into Safe Mode

1. For Windows 7,XP and Vista. 2. For Windows 8, 8.1 and 10.

For Windows XP, Vista, 7 systems:

1. Remove all CDs and DVDs, and then Restart your PC from the “Start” menu.
2. Select one of the two options provided below:

For PCs with a single operating system: Press “F8” repeatedly after the first boot screen shows up during the restart of your computer. In case the Windows logo appears on the screen, you have to repeat the same task again.

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For PCs with multiple operating systems: Тhe arrow keys will help you select the operating system you prefer to start in Safe Mode. Press “F8” just as described for a single operating system.

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3. As the “Advanced Boot Options” screen appears, select the Safe Mode option you want using the arrow keys. As you make your selection, press “Enter“.

4. Log on to your computer using your administrator account

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While your computer is in Safe Mode, the words “Safe Mode” will appear in all four corners of your screen.

Step 1: Open the Start Menu

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Step 2: Whilst holding down Shift button, click on Power and then click on Restart.
Step 3: After reboot, the aftermentioned menu will appear. From there you should choose Troubleshoot.

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Step 4: You will see the Troubleshoot menu. From this menu you can choose Advanced Options.

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Step 5: After the Advanced Options menu appears, click on Startup Settings.

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Step 6: Click on Restart.
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Step 7: A menu will appear upon reboot. You should choose Safe Mode by pressing its corresponding number and the machine will restart.

2. Remove CryptoJoker Ransomware with SpyHunter Anti-Malware Tool

2. Remove CryptoJoker Ransomware with SpyHunter Anti-Malware Tool

1. Install SpyHunter to scan for and remove CryptoJoker Ransomware.2. Scan with SpyHunter to Detect and Remove CryptoJoker Ransomware.
Step 1:Click on the “Download” button to proceed to SpyHunter’s download page.

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It is highly 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.

Step 2: Guide yourself by the download instructions provided for each browser.
Step 3: After you have installed SpyHunter, wait for it to automatically update.

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Step1: After the update process has finished, click on the ‘Scan Computer Now’ button.
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Step2: After SpyHunter has finished scanning your PC for any CryptoJoker Ransomware files, click on the ‘Fix Threats’ button to remove them automatically and permanently.
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Step3: Once the intrusions on your PC have been removed, it is highly recommended to restart it.

3. Remove CryptoJoker Ransomware with Malwarebytes Anti-Malware.

3. Remove CryptoJoker Ransomware with Malwarebytes Anti-Malware

1. Install Malwarebytes Anti-Malware to scan for and remove CryptoJoker Ransomware. 2. Scan your PC with MalwareBytes to remove all CryptoJoker Ransomware associated files automatically.
Step 1: Download Malwarebytes by clicking here.
Step 2: A pop-up window will appear. Click on the ‘Save File’ button. If it does not, click on the Download button and save it afterwards.
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Step 3: After you have downloaded the setup, simply open it.
Step 4: The installer should appear. Click on the ‘Next’ button.
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Step 5: Check the ‘I accept the agreement’ check circle if not checked if you accept it and click the ‘Next’ button once again.
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Step 6: Review and click on ‘Next’ on the following 4 steps that will appear afterwards and after that click on the ‘Install’ button.
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Step 7: After the installation process has completed click on the ‘Finish’ button and check the ‘Launch MalwareBytes AntiMalware’ check box.
Step 1: Launch MalwareBytes if you havent launched it after install.
Step 2: Wait for the software to update and then click on the blue ‘Scan Now’ button. If it doesnt start updating automatically, click on the blue ‘Update Now’ highlighted text.
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Step 3: At this point, after clicking the ‘Scan Now’ button, the system should start scanning your PC. It may take a while but be patient – it is worth it.
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Step 4: After the scan has been complete and all of the threats have been identified, click on the ‘Remove Selected’ button to detelete them permanently.
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Step 5: Once the scan has completed, MalwareBytes will prompt you to restart your computer. It is recommended to save all your data you are working on before restarting.

4. Remove CryptoJoker Ransomware with STOPZilla AntiMalware

4. Remove CryptoJoker Ransomware with STOPZilla AntiMalware

1. Install STOPZilla Anti Malware to scan for and remove CryptoJoker Ransomware. 2. Scan your PC with STOPZilla Anti Malware to remove all CryptoJoker Ransomware associated files completely.
Step 1: Download STOPZilla by clicking here.
Step 2: A pop-up window will appear. Click on the ‘Save File’ button. If it does not, click on the Download button and save it afterwards.
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Step 3: After you have downloaded the setup, simply open it.
Step 4: The installer should appear. Click on the ‘Next’ button.
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Step 5: Check the ‘I accept the agreement’ check circle if not checked if you accept it and click the ‘Next’ button once again.
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Step 6: Review and click on the ‘Install’ button.
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Step 7: After the installation process has completed click on the ‘Finish’ button.
Step 1: Launch STOPZilla if you havent launched it after install.
Step 2: Wait for the software to automatically scan and then click on the ‘Repair Now’ button. If it does not scan automatically, click on the ‘Scan Now’ button.
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Step 3: After the removal of all threats and associated objects, you should Restart your PC.

5. Back up your data to secure it against infections and file encryptions by CryptoJoker Ransomware in the future

5. Back up your data to secure it against attacks in the future

Security engineers recommend that you back up your files immediately, preferably on an external memory carrier in order to be able to restore them. In order to protect yourself from CryptoJoker Ransomware (For Windows Users) please follow these simple steps:

1. For Windows 7 and earlier 1. For Windows 8, 8.1 and 10 1. Enabling the Windows Defense Feature (Previous Versions)

1-Click on Windows Start Menu
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2-Type Backup And Restore
3-Open it and click on Set Up Backup
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4-A window will appear asking you where to set up backup. You should have a flash drive or an external hard drive. Mark it by clicking on it with your mouse then click on Next.
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5-On the next window, the system will ask you what do you want to backup. Choose the ‘Let Me Choose’ option and then click on Next.
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6-Click on ‘Save settings and run backup’ on the next window in order to protect your files from possible attacks by CryptoJoker Ransomware.
backup-5

1-Press Windows button + R
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2-In the window type ‘filehistory’ and press Enter
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3-A File History window will appear. Click on ‘Configure file history settings’
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4-The configuration menu for File History will appear. Click on ‘Turn On’. After its on, click on Select Drive in order to select the backup drive. It is recommended to choose an external HDD, SSD or a USB stick whose memory capacity is corresponding to the size of the files you want to backup.
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5-Select the drive then click on ‘Ok’ in order to set up file backup and protect yourself from CryptoJoker Ransomware.

1- Press Windows button + R keys.
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2- A run windows should appear. In it type ‘sysdm.cpl’ and then click on Run.
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3- A System Properties windows should appear. In it choose System Protection.
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5- Click on Turn on system protection and select the size on the hard disk you want to utilize for system protection.
6- Click on Ok and you should see an indication in Protection settings that the protection from CryptoJoker Ransomware is on.
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Restoring a file via Windows Defense feature:
1-Right-click on the encrypted file, then choose Properties.
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2-Click on the Previous Versions tab and then mark the last version of the file.
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3-Click on Apply and Ok and the file encrypted by CryptoJoker Ransomware should be restored.

NOTE! Substantial notification about the CryptoJoker Ransomware threat: Manual removal of CryptoJoker Ransomware requires interference with system files and registries. Thus, it can cause damage to your PC. Even if your computer skills are not at a professional level, don’t worry. You can do the removal yourself just in 5 minutes, using a malware removal tool.
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Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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