KCTF Locker ransomware

September 28, 2018

What is KCTF Locker ransomware

KCTF Locker ransomware is a virus developed for educational purposes. At the moment, it is targeting Japanese-speaking users.

KCTF Locker ransomware is a file-encrypting virus that was supposedly invented for educational purposes. However, no educational organization or service is linked to this threat, and the only ones who should be blamed are hackers. The main targets of this ransomware are Japanese-speaking users as the ransom note it displays is written in this language, and the sample of the virus was uploaded from East Asia IP address. KCTF Locker modifies the victim’s data by using the XOR encryption method, and, after the process, marks locked files with .DWG file extension. After the encryption, files become useless. The ransom note, which was called as KCTF LOCKER, typically states that files have been encrypted and that the victim needs to pay 10 BTC to the provided wallet to get them restored.

KCTF Locker ransomware

Download Removal Toolto remove KCTF Locker ransomware

KCTF Locker ransomware is a cryptovirus that modifies various data on the infected system. For the encryption, it chooses anything from photos, videos to documents or even archives. The virus typically changes the code of the data by using the predetermined encryption algorithm to make it useless. You can identify encrypted files because ransomware is appending .DWG file extension to the locked data.

After the encryption is done using XOR encryption method, virus generates a ransom note and places it as a program window on the screen. The message called KCTF LOCKER displays the following text:

KCTF Locker ransomware demands to 10 BTC for the locked files, but we do not recommend paying this fee or even contacting these cybercriminals in any way. Any communication between the victim and hackers can lead you to the permanent data or money loss.

You need to remove KCTF Locker ransomware as soon as possible, so you can clean your device and restore locked data. Since the threat can block your antivirus, you should reboot the device in Safe Mode with Networking and then run a scan. You can find alternative removal methods down below as well as the ransomware tends to block its victims and prevent its removal.

After the proper KCTF Locker removal, you need to fix the damage this threat caused. You can use reputable anti-malware like for the job. This tool scans your system thoroughly and detects various system vulnerabilities and other possible threats. If you are planning to do a data recovery using a backup, you can only do that after the device is fully cleaned. Ransomware can encrypt newly added data too.

How does KCTF Locker ransomware works

Malicious actors have been widely using email campaigns to distribute their viruses. They have been luring people to open safe-looking emails and download file attachments with macro-virus or direct malware script. Typically, these malicious emails look legitimate because virus developers tend to hide their products under well-known company names and logos.

Download Removal Toolto remove KCTF Locker ransomware

You should be aware of these techniques and, every time you get an email you are not expecting, delete these messages without opening. If you downloaded the file from the email that was affected by ransomware, the minute you open it malware installs direct script to your device and your system gets infected.

You can avoid this if you scan every file with an antivirus before opening it on the device. Also, you can look for red flags on these emails. For example, if the email contains various ads or other commercial content you should be concerned. Researchers note that typos, grammar mistakes or lots of hyperlinks can indicate that this email is spam and has no important information.

How to delete KCTF Locker ransomware

To remove KCTF Locker ransomware properly and get rid of the damage, you need to be very cautious. Since this is a silent intruder, it may work in the background and change various settings on the device. Use our guide to block the virus and then scan the system using , or Anti-MalwareNorton Internet Security to clean the system thoroughly and fix the damage caused by the threat.

Manual KCTF Locker ransomware removal is not recommended as there are numerous files and components to look after. Then, don’t forget to clean up all the damage after the virus termination and restore your encrypted files. To recover this data, you can also rely on methods provided by our experts.

Stage 1: Delete Browser Extension

First of all, we would recommend that you check your browser extensions and remove any that are linked to KCTF Locker ransomware. A lot of adware and other unwanted programs use browser extensions in order to hijacker internet applications.

Remove KCTF Locker ransomware Extension from Google Chrome

  1. Launch Google Chrome.
  2. In the address bar, type: chrome://extensions/ and press Enter.
  3. Look for KCTF Locker ransomware or anything related to it, and once you find it, press ‘Remove’.

Uninstall KCTF Locker ransomware Extension from Firefox

  1. Launch Mozilla Firefox.
  2. In the address bar, type: about:addons and press Enter.
  3. From the menu on the left, choose Extensions.
  4. Look for KCTF Locker ransomware or anything related to it, and once you find it, press ‘Remove’.

Delete KCTF Locker ransomware Extension from Safari

  1. Launch Safari.
  2. Press on the Safari Settings icon, which you can find in the upper-right corner.
  3. Select Preferences from the list.
  4. Choose the Extensions tab.
  5. Look for KCTF Locker ransomware or anything related to it, and once you find it, press ‘Uninstall’.
  6. Additionally, open Safari Settings again and choose Downloads.
  7. If KCTF Locker ransomware.safariextz appears on the list, select it and press ‘Clear’.

Remove KCTF Locker ransomware Add-ons from Internet Explorer

  1. Launch Internet Explorer.
  2. From the menu at the top, select Tools and then press Manage add-ons.
  3. Look for KCTF Locker ransomware or anything related to it, and once you find it, press ‘Remove’.
  4. Reopen Internet Explorer.In the unlikely scenario that KCTF Locker ransomware is still on your browser, follow the additional instructions below.
  5. Press Windows Key + R, type appwiz.cpl and press Enter
  6. The Program and Features window will open where you should be able to find the KCTF Locker ransomware program.
  7. Select KCTF Locker ransomware or any other recently installed unwanted entry and press ‘Uninstall/Change’.

Alternative method to clear the browser from KCTF Locker ransomware

There may be cases when adware or PUPs cannot be removed by simply deleting extensions or codes. In those situations, it is necessary to reset the browser to default configuration. In you notice that even after getting rid of weird extensions the infection is still present, follow the below instructions.

Use Chrome Clean Up Tool to Delete KCTF Locker ransomware

  1. Launch Google Chrome.
  2. In the address box, type: chrome://settings/ and press Enter.
  3. Expand Advanced settings, which you can find by scrolling down.
  4. Scroll down until you see Reset and Cleanup.
  5. Press on Clean up computer. Then press Find.

This Google Chrome feature is supposed to clear the computer of any harmful software. If it does not detect KCTF Locker ransomware, go back to the Clean up computer and reset settings.

Reset Mozilla Firefox to Default

If you still find KCTF Locker ransomware in your Mozilla Firefox browser, you should be able to get rid of it by restoring your Firefox settings to default. While extensions and plug-ins will be deleted, this will not touch your browser history, bookmarks, saved passwords or Internet cookies.

Download Removal Toolto remove KCTF Locker ransomware
  1. Launch Mozilla Firefox
  2. Into the address box, type: about:support and press Enter.
  3. You will be redirected to a Troubleshooting Information page.
  4. From the menu on the right side, select Refresh Firefox.
  5. Confirm your choice by clicking Refresh Firefox in the new window.
  6. Your browser will close automatically in order to successfully restore the settings.
  7. Press Finish.

Reset Safari Browser to Normal Settings

  1. Launch Safari.
  2. Press on the Safari Settings icon, which you can find in the upper-right corner.
  3. Press Reset Safari.
  4. A new window will appear. Select the boxes of what you want to reset or use the screenshot below to guide you. Once you have selected everything, press ‘Reset’.
  5. Restart Safari.

Restore Internet Explorer to Default Settings

  1. Launch Internet Explorer.
  2. From the top menu, press on Tools and then Internet Options.
  3. In the new window that opens, choose the Advanced tab.
  4. At the bottom of the window, below Reset Internet settings, there will be a ‘Reset’ button. Press that.

While extensions and plug-ins will be deleted, this will not touch your browser history, bookmarks, saved passwords or Internet cookies.

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