Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
CTB-Locker, also known as Critoni Ransomware, is a Trojan that encrypts the files on the infected computer and blocks the user’s access to his data. Critoni Ransomware displays a ransom message demanding a high price for the decryption of the files. As researchers have established, the crypto-malware has been for sale on the black market for around 3000 US dollars. Experts warn that the threat is still actively infecting computers worldwide and recommend installing a trustworthy anti-malware tool no your machine and performing regular backups of your important files.
Name
CTB-Locker
Type
Ransomware
Short Description
The cyber-threat encrypts user files leaving a ransom note and asking for 0.2 BTC to decrypt the files.
Symptoms
The user may witness his files to become encrypted with the .ctb, .ctbl and .ctb2 as well as random file extensions.
CTB Locker has been reported by Microsoft Malware Protection Center to be spread via exploit kits or a Trojan.Downloader. Exploit kits may be created for plugins such as Java or Flash Player and it is easy to insert malicious code that creates weaknesses in Windows. Furthermore, the Trojan.Downloader that may be used might collect different information about the computer that will be infected so that the infection process is undetected. Such information may be details about the Windows version, type of Antivirus software used, etc. The Trojan may spread via malicious links that may contain drive-by-downloads or malicious attachments sent online.
CTB Locker Ransomware – What Does It Do?
Once it has been downloaded and activated, the ransomware may insert malicious code into the critical Windows process, called svchost.exe. Furthermore it may create randomly named files, such as sz0s8g2h.exe for example, in the following folders:
%Temp%
%AppData%
According to Microsoft researchers, after it has created its payload files, the ransomware begins to scan for and encrypt files with these file extensions:
→3fr 7z abu accdb ai arp arw bas bay bdcr bdcu bdd bdp bds blend bpdr bpdu bsdr bsdu c cdr cer config cpp cr2 crt crw cs dbf dbx dcr dd dds der dng doc docm docx dwg dxf dxg eps erf fdb gdb groups gsd gsf ims indd iss jpe jpeg jpg js kdc kwm md mdb mdf mef mrw nef nrw odb odm odp ods odt orf p12 p7b p7c pas pdd pdf pef pem pfx php pl ppt pptm pptx psd pst ptx pwm py r3d raf rar raw rgx rik rtf rw2 rwl safe sql srf srw txt vsd wb2 wpd wps xlk xls xlsb xlsm xlsx zip
After encrypting the files of users, it may add a suspicious file extension after the files. The following file extensions are reported by researchers from Microsoft and BleepingComputer to be used by CTB Locker:
.ctb
.ctb2
.ctbl
Random file extensions(newer versions)
The ransomware then may drop the following files that contain the demands of the cyber-criminals:
%MyDocuments%\AllFilesAreLocked{randomuserid}.bmp
%MyDocuments%\{randomname}.html
%MyDocuments%\DecryptAllFiles{randomuserid}.txt
These files contain the ransom instructions. One of them is the wallpaper that is changed to the following:
The encrypted files contain a decryption key held by the cyber criminals. As other ransomware Trojans, CTB-Locker uses Onion routing (Tor) in order to remain anonymous and protect the cyber-crooks’ identity. The good news is that compared to other crypto-viruses, CTB-Locker does not demand a ransom this high. The ransom amount demanded is 0.2 Bitcoins which is around 120 US dollars.
What is new about this ransomware is that the new variants may use random file extensions to encrypt the files such as .zz2dqj or .9jsaxsf. Upon opening, Windows claims that the questionable files are corrupt, and they cannot be fixed by simply removing the extension for the file. Here is an example of an encrypted file names by CTB-Locker:
New Document.docx.ctbl
New Picture.jpg.ctb
New Presentation.pptx.ctb2
New Text Document.vdi.adid2k
Even though paying the ransom money may bring back your files, we strongly advise you NOT to do it, even though the newer variant of CTB decrypts 5 files for free. This funds the cyber-criminals to develop further their virus plus it may be no guarantee that the decryption keys for your files will be sent back to you so you can restore them.
Here is the decryption screen users see when they are following the decryption instructions:
Source: Bleeping Computer
Removing CTB-Locker Ransomware Completely
To remove this nasty ransomware virus, you should boot your PC into safe mode and install an anti-malware scanner that will locate its registry entries and restore any scheduled tasks for the malware to run on system start. For maximum effectiveness, it is advisable to download the anti-malware software from a safe PC and install it via offline installer to the infected one while you are offline.
1. Boot Your PC In Safe Mode to isolate and remove CTB-Locker
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.
– 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.
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
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
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.
Step 4: You will see the Troubleshoot menu. From this menu you can choose Advanced Options.
Step 5: After the Advanced Options menu appears, click on Startup Settings.
Step 6: Click on Restart.
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 CTB-Locker with SpyHunter Anti-Malware Tool
2. Remove CTB-Locker with SpyHunter Anti-Malware Tool
1. Install SpyHunter to scan for and remove CTB-Locker.2. Scan with SpyHunter to Detect and Remove CTB-Locker.
Step 1:Click on the “Download” button to proceed to SpyHunter’s download page.
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.
Step1: After the update process has finished, click on the ‘Scan Computer Now’ button. Step2: After SpyHunter has finished scanning your PC for any CTB-Locker files, click on the ‘Fix Threats’ button to remove them automatically and permanently. Step3: Once the intrusions on your PC have been removed, it is highly recommended to restart it.
3. Back up your data to secure it against infections and file encryption by CTB-Locker in the future
3. 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 CTB-Locker (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 2-Type Backup And Restore 3-Open it and click on Set Up Backup 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. 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. 6-Click on ‘Save settings and run backup’ on the next window in order to protect your files from possible attacks by CTB-Locker.
1-Press Windows button + R 2-In the window type ‘filehistory’ and press Enter 3-A File History window will appear. Click on ‘Configure file history settings’ 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. 5-Select the drive then click on ‘Ok’ in order to set up file backup and protect yourself from CTB-Locker.
1- Press Windows button + R keys. 2- A run windows should appear. In it type ‘sysdm.cpl’ and then click on Run. 3- A System Properties windows should appear. In it choose System Protection. 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 CTB-Locker is on. Restoring a file via Windows Defense feature: 1-Right-click on the encrypted file, then choose Properties. 2-Click on the Previous Versions tab and then mark the last version of the file. 3-Click on Apply and Ok and the file encrypted by CTB-Locker should be restored.
Optional: Using Alternative Anti-Malware Tools
4. Remove CTB-Locker Using Other Alternative Tools
Malwarebytes Anti-MalwareSTOPZilla Anti Malware
1. Install Malwarebytes Anti-Malware to scan for and remove CTB-Locker. 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. Step 3: After you have downloaded the setup, simply open it. Step 4: The installer should appear. Click on the ‘Next’ button. Step 5: Check the ‘I accept the agreement’ check circle if not checked if you accept it and click the ‘Next’ button once again. Step 6: Review and click on ‘Next’ on the following 4 steps that will appear afterwards and after that click on the ‘Install’ button. Step 7: After the installation process has completed click on the ‘Finish’ button and check the ‘Launch MalwareBytes AntiMalware’ check box.
2. Scan your PC with MalwareBytes to remove all CTB-Locker associated files automatically.
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. 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. Step 4: After the scan has been complete and all of the threats have been identified, click on the ‘Remove Selected’ button to delete them permanently. 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.
1. Download and Install STOPZilla Anti-malware to Scan for And Remove CTB-Locker. 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. Step 3: After you have downloaded the setup, simply open it. Step 4: The installer should appear. Click on the ‘Next’ button. Step 5: Check the ‘I accept the agreement’ check circle if not checked if you accept it and click the ‘Next’ button once again. Step 6: Review and click on the ‘Install’ button. Step 7: After the installation process has completed click on the ‘Finish’ button.
2. Scan your PC with STOPZilla Anti Malware to remove all CTB-Locker associated files completely. Step 1:Launch STOPZilla if you haven’t 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. Step 3: After the removal of all threats and associated objects, you should Restart your PC.
Restore Files Encrypted by CTB-Locker Ransomware
Security engineers strongly advise users NOT to pay the ransom money and attempt restoring the files using other methods. Here are several suggestions:
To restore your data, your first bet is to check again for shadow copies in Windows using this software:
Another method of restoring your files is by trying to bring back your files via data recovery software. Here are some examples of data recovery programs:
NOTE! Substantial notification about the CTB-Locker threat: Manual removal of CTB-Locker 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.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
CTB-Locker may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
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.
Preparation before removing CTB-Locker.
Before starting the actual removal process, we recommend that you do the following preparation steps.
Make sure you have these instructions always open and in front of your eyes.
Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
Be patient as this could take a while.
Step 1: Boot Your PC In Safe Mode to isolate and remove CTB-Locker
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: Clean any registries, created by CTB-Locker 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 CTB-Locker 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.
Step 3: Find files created by CTB-Locker
For Windows 8, 8.1 and 10. For Windows XP, Vista, and 7.
For Newer Windows Operating Systems
1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.
2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.
3: Navigate to the search box in the top-right of your PC’s screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be “fileextension:exe”. After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:
N.B. We recommend to wait for the green loading bar in the navination box to fill up in case the PC is looking for the file and hasn’t found it yet.
For Older Windows Operating Systems
In older Windows OS’s the conventional approach should be the effective one:
1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.
2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.
3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.
Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.
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 CTB-Locker 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.
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.
If any threats have been removed, it is highly recommended to restart your PC.
Step 5 (Optional): Try to Restore Files Encrypted by CTB-Locker.
Ransomware infections and CTB-Locker aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested several alternative methods that may help you go around direct decryption and try to restore your files. Bear in mind that these methods may not be 100% effective but may also help you a little or a lot in different situations.
Method 1: Scanning your drive’s sectors by using Data Recovery software. Another method for restoring your files is by trying to bring back your files via data recovery software. Here is one advanced software for preferred data recovery software solution:
Method 2: Trying Kaspersky and EmsiSoft’s decryptors. If the first method does not work, we suggest trying to use decryptors for other ransomware viruses, in case your virus is a variant of them. The two primary developers of decryptors are Kaspersky and EmsiSoft, links to which we have provided below:
To restore your data in case you have backup set up, it is important to check for Volume Shadow Copies, if ransomware has not deleted them, in Windows using the below software:
Method 4: Finding the decryption key while the cryptovirus sends it over a network via a sniffing tool.
Another way to decrypt the files is by using a Network Sniffer to get the encryption key, while files are encrypted on your system. A Network Sniffer is a program and/or device monitoring data traveling over a network, such as its internet traffic and internet packets. If you have a sniffer set before the attack happened you might get information about the decryption key. See how-to instructions below:
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
CTB-Locker may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
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.
Preparation before removing CTB-Locker.
Before starting the actual removal process, we recommend that you do the following preparation steps.
Make sure you have these instructions always open and in front of your eyes.
Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
Be patient as this could take a while.
Step 1: Boot Your PC In Safe Mode to isolate and remove CTB-Locker
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: Clean any registries, created by CTB-Locker 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 CTB-Locker 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.
Step 3: Find files created by CTB-Locker
For Windows 8, 8.1 and 10. For Windows XP, Vista, and 7.
For Newer Windows Operating Systems
1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.
2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.
3: Navigate to the search box in the top-right of your PC’s screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be “fileextension:exe”. After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:
N.B. We recommend to wait for the green loading bar in the navination box to fill up in case the PC is looking for the file and hasn’t found it yet.
For Older Windows Operating Systems
In older Windows OS’s the conventional approach should be the effective one:
1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.
2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.
3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.
Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.
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 CTB-Locker 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.
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.
If any threats have been removed, it is highly recommended to restart your PC.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
CTB-Locker may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
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.
Preparation before removing CTB-Locker.
Before starting the actual removal process, we recommend that you do the following preparation steps.
Make sure you have these instructions always open and in front of your eyes.
Be patient as this could take a while.
Step 1: Uninstall CTB-Locker and related software from Windows
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
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 2: Clean your Browsers from CTB-Locker.
Remove an extension from Mozilla FirefoxRemove an extension from Google Chrome Remove an extension from Internet Explorer Remove an extension from Microsoft Edge
1. Start Mozilla Firefox. Open the menu window
2. Select the “Add-ons” icon from the menu.
3. Select the unwanted extension and click “Remove“
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.
1. Start Google Chrome and open the drop menu
2. Move the cursor over “Tools” and then from the extended menu choose “Extensions“
3. From the opened “Extensions” menu locate the unwanted extension and click on its “Remove” button.
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.
1. Start Internet Explorer: 2. Click on the gear icon labeled ‘Tools’ to open the drop menu and select ‘Manage Add-ons’
3. In the ‘Manage Add-ons’ window.
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’.
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.
1. Start Edge
2. Open the drop menu by clicking on the icon at the top right corner.
3. From the drop menu select “Extensions”.
4. Choose the suspected malicious extension you want to remove and then click on the gear icon.
5. Remove the malicious extension by scrolling down and then clicking on Uninstall.
Step 3: Clean any registries, created by CTB-Locker 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 CTB-Locker 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 CTB-Locker 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.
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.
If any threats have been removed, it is highly recommended to restart your PC.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
CTB-Locker may remain persistent on your system and may re-infect it. We recommend you to download Combo Cleaner and run free scan to remove all virus files on your Mac. This saves you hours of time and effort compared to doing the removal yourself.
Combo Cleaner’s scanner is free but the paid version is needed to remove the malware threats. Read Combo Cleaner’s EULA and Privacy Policy
Preparation Phase:
Before starting to follow the steps below, be advised that you should first do the following preparations:
Backup your files in case the worst happens.
Make sure to have a device with these instructions on standy.
Arm yourself with patience.
Step 1: Uninstall CTB-Locker 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 Combo Cleaner
Keep in mind, that Combo Cleaner needs to purchased to remove the malware threats. Click on the corresponding links to check Combo Cleaner’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 CTB-Locker:
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 CTB-Locker. 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 CTB-Locker. 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”.
Step 2: Remove CTB-Locker – related extensions from your Mac’s browsers
Remove a toolbar from Mozilla FirefoxRemove a toolbar from Google Chrome Remove an extension from Safari and reset it.
1. Start Mozilla Firefox. Open the menu window
2. Select the “Add-ons” icon from the menu.
3. Select the Extension and click “Remove“
4. After the extension is removed, restart Mozilla Firefox by closing it from the red “X” in the top right corner and start it again.
1. Start Google Chrome and open the drop menu
2. Move the cursor over “Tools” and then from the extended menu choose “Extensions“
3. From the opened “Extensions” menu locate the add-on and click on the garbage bin icon on the right of it.
4. After the extension is removed, restart Google Chrome by closing it from the red “X” in the top right corner and start it again.
1. Start Safari
2. After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
3. From the menu, click on “Preferences“
4. After that, select the ‘Extensions’ Tab
5. Click once on the extension you want to remove.
6. Click ‘Uninstall’
A pop-up window will appear asking for confirmation to uninstall the extension. Select ‘Uninstall’ again, and the CTB-Locker 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.
Step 3: Scan for and remove CTB-Locker files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as CTB-Locker, 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.
Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.
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Source: Bleeping Computer
1. For Windows 7,XP and Vista.
2. For Windows 8, 8.1 and 10.
1. Install SpyHunter to scan for and remove CTB-Locker.
1. For Windows 7 and earlier
Malwarebytes Anti-Malware
STOPZilla Anti Malware
Remove an extension from Mozilla Firefox
Remove an extension from Google Chrome
Remove an extension from Internet Explorer
Remove an extension from Microsoft Edge
Remove an extension from Safari and reset it.
