Cancer virus. How to remove? (Uninstall guide)

removal by Jake Doevan - - | Type: Malware
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How dangerous is Cancer virus?

Cancer virus has been recently noticed spreading and pretending to be a hazardous file-encrypting malware[1]. However, it does not act like a typical encryption malware. It does not use any strong encryption algorithm to encrypt targeted files. What is more, malware does not demand to pay the ransom for data recovery. Cancer malware also resembles a lockscreen ransomware[2]. After infiltration, it starts running various processes and delivers unknown errors warning about system-related problems. These alerts might be impossible to close, or they may lock computer’s screen. Surprisingly, malware does not leave any ransom note[3] with instructions how you should treat this cyber infection. It only drops an ewwwwww ~ cancer.png file, which becomes a new background picture that includes unpleasant words “I have cancer.” Sadly, changing the wallpaper won’t help. In order to get rid of this cyber threat and all its negative features, you have to perform Cancer removal.

Cancer ransomware aims at Microsoft Office and OpenOffice documents, PDF and text files, various formats of images, audio or video files, archives, databases, and many other mostly used files. In this way, it makes the attack even worse because users are scared of losing their files. During this fake file-encryption process, malware appends a .cancer file extension to each affected file. However, it seems that you might be able to recover your files simply from Shadow Volume Copies, using Windows Previous Versions features or using other data recovery tools. After infiltration Cancer virus also renames C: drive to “CANCERRRRRRRRRRRRRRRRRRRRRRRRR.” The reason why it behaves in this way it’s unknown. This fake crypto-malware might be just a test version of a serious cyber threat that might appear on the Web soon. Cyber criminals may update the virus and launch another attack. However, next time they might use unbreakable encryption algorithms and demand to pay few Bitcoins for decryption software. Therefore, you should remove Cancer as soon as it appears on your computer and starts messing up with it. When you notice suspicious warnings or the changed wallpaper, run a full system scan with Reimage. However, if your computer’s screen is locked or you cannot install security software, scroll down till the end. There you will find instructions how to start the automatic removal.

How do hackers distribute the malware?

Cancer screenlocker virus is a brand new malware, and specific distribution techniques have not been discovered yet. Though, it seems that developers apply same old strategies to infiltrate computers. Malicious spam emails[4] and their attachments stay the main way how malware travels on the Web. Cyber criminals think of many reasons to convince people to open an infected email attachment; so, always be careful and do not rush opening the attachments. What is more, Cancer malware might also be using exploit kits, fake software updates[5], and installers. Hence, it’s important to choose secure sources for software installation and keep your programs updates. We highly recommend setting automatic updates because you won’t be bothered by suspicious ads claiming about the necessity to install some updates.

The step-by-step guide for Cancer removal

Cancer removal requires performing a full system scan with reputable malware removal software. Scanning the system with such tools as Reimage or Malwarebytes Anti Malware ensures that all virus related-components will be found and removed from the system. Malware not only makes a havoc on your PC by messing up with your files, running various processes and delivering system warnings. It also makes your computer vulnerable. As a result, other malware and viruses may try to attack and cause even more damage to you. Therefore, remove Cancer as soon as it steps inside your computer and replaces the wallpaper. However, if you have difficulties with installing an anti-malware program or cannot run a full system scan, follow the instructions below.

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall Cancer virus. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.

More information about this program can be found in Reimage review.

More information about this program can be found in Reimage review.

Manual Cancer virus Removal Guide:

Remove Cancer using Safe Mode with Networking

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

If your computer’s screen is locked or malware prevents from installing security tools to run the system scan, follow the instructions to reboot your PC to the Safe Mode.

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Cancer

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Cancer removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Cancer using System Restore

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

Sometimes malware can lock affected computer’s screen and block access to the malware removal software. In this case you won’t be able to start malware removal. Follow the instructions to get access to the anti-malware software.

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Cancer. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that Cancer removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Cancer from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If Cancer virus encrypted your files, try these methods below to restore them.

If your files are encrypted by Cancer, you can use several methods to restore them:

Use Data Recovery Pro to restore files encrypted by Cancer ransomware

Data Recovery Pro offers an automatic solution to recover damaged, deleted or encrypted files. We can assure that this tool is simple to use even for not experienced computer users.

Restore individual files encrypted by Cancer virus using Windows Previous Versions feature

This method may help to recover individual files only if System Restore function has been enabled before ransomware attack.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

Use ShadowExplorer to restore files encrypted by Cancer screenlocker virus

If malware failed to delete Shadow Volume Copies of the targeted files, you could use ShadowExplorer to restore them. Follow the instructions:

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Cancer and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Jake Doevan
Jake Doevan - Computer technology expert

If this free removal guide helped you and you are satisfied with our service, please consider making a donation to keep this service alive. Even a smallest amount will be appreciated.

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  • me

    People have cancer, computers have cancer…

  • virus

    I need decryptor so much!

  • josh

    thanks to you guys, i got rid of this virus!