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Description of Contosor.exe virus. How does it act on a compromised computer?

While gathering information about this new ransomware we found that it is a Ransomware-as-a-Service-type (RaaS) ransomware, which means that its developers grant certain people permission or license to distribute and use this ransomware. Obviously, it has nothing to do with Contosor.exe because it is a piece of software designed to encrypt your files and demand that you pay a ransom. For example, a fictitious survey could be used to collect information about you beforehand. According to our analysts’ team, it is possible to decrypt files by entering a combination of specific letters into the “Serial code” boxes that are represented via the screen-locking message.


Download Removal Toolto remove Contosor.exe

* WiperSoft scanner, available at this website, only works as a tool for virus detection. To have WiperSoft in its full capacity, to use removal functionality, it is necessary to acquire its full version. In case you want to uninstall WiperSoft, click here.

Since this ransomware is indeed a RaaS, it means that it could be spread on the web in a number of ways. Ransomware applications are often spread either through Spam emails or malicious web pages. //pagebin.com/xxqZ8VES. Be sure you do NOT let this Trojan and other malicious components remain on your computer. Following the successful entrance, Contosor.exe drops a file readme.txt on Desktop. \, and other directories and drives that usually contain the most valuable information and media files. No matter which of these messages left for users you read, you will not need much time to realize that this ransomware infection wants your money.

How did this malicious program enter your computer system?

Soon after the Trojan gets in it should start creating various randomly titled files in the %USERPROFILE%, %APPDATA%, %TEMP%, %PROGRAMFILES%, or any other folders as well. Well, what happens if the time runs out? In order to launch the file itself, Contosor.exe employs the rundll32.exe from %WINDIR%\SysWOW64 or %WINDIR%\System32. It is also possible that it could be used to spy on the victim and record sensitive information. Each enciphered file should be marked with .Contosor.exeed extension, e.g. Besides these threats, the malicious program’s creators wrote instructions on how to decipher affected data.

Our research and tests show that this ransomware encrypts your photos, documents, archives, and program files using XOR and RSA algorithms. The removal of this threat is quite a challenging task, especially if you make a decision to erase it manually. If you received such mail, be sure to ignore it and never click on the link, which leads to the infiltration of Contosor.exe. If you choose to continue yourself, please use the comment section below to ask questions about the obstacles you encounter, because we do not want you creating more troubles for yourself. The good news is that this threat does not disrupt your operating system and browsers so that you can download anti-malware software without any obstacles. If you have any questions about the process, you can use the comments section to communicate with us.

How does Contosor.exe Trojan spread?

According to the message, the threat is programmed to delete a particular amount of files each 60 minutes until the victim pays the ransom. The reason is also simple; Hence, we have found that this program is disseminated using email spam. Those who prefer working with automatic features, could employ a reliable antimalware tool and perform a system scan. Keep in mind that even after protecting your system with antimalware software, your encrypted files will not be available for you to use.

Download Removal Toolto remove Contosor.exe

* WiperSoft scanner, available at this website, only works as a tool for virus detection. To have WiperSoft in its full capacity, to use removal functionality, it is necessary to acquire its full version. In case you want to uninstall WiperSoft, click here.


Learn how to remove Contosor.exe from your computer

Step 1. Remove Contosor.exe via Safe Mode with Networking

a) Windows 7/Windows Vista/Windows XP

  1. Press the Start menu, select Shut down and press Restart. win7-restart Remove Contosor.exe
  2. Tap the key F8 until Advanced Boot Options appears.
  3. Go down to Safe Mode with Networking and press Enter. win7-safe-mode Remove Contosor.exe
  4. When your computer loads, download anti-malware software and use it to delete Contosor.exe.

b) Windows 8/Windows 10

  1. Start → the shut down button.
  2. Hold Shift and press Restart. win10-restart Remove Contosor.exe
  3. Troubleshoot → Advanced options → Startup Settings. win-10-startup Remove Contosor.exe
  4. Enable Safe Mode → Restart. win10-safe-mode Remove Contosor.exe
  5. When your computer loads, download anti-malware software and use it to delete Contosor.exe.

Step 2. Remove Contosor.exe via System Restore

a) Windows 7/Windows Vista/Windows XP

  1. Press the Start menu, select Shut down and press Restart. win7-restart Remove Contosor.exe
  2. Tap the key F8 until Advanced Boot Options appears.
  3. Go down to Safe Mode with Command Prompt. win7-safe-mode Remove Contosor.exe
  4. When the Advanced Boot Options appears, type in cd restore.
  5. Press Enter.
  6. Type in rstrui.exe and press Enter. win7-command-prompt Remove Contosor.exe
  7. In the System Restore Window, press Next.
  8. Choose restore point, and press Next . win7-restore Remove Contosor.exe
  9. Press Yes.

b) Windows 8/Windows 10

  1. Start → Shut down button.
  2. Hold Shift and press Restart. win10-restart Remove Contosor.exe
  3. Troubleshoot → Advanced options → Command Prompt. win-10-startup Remove Contosor.exe
  4. When the Advanced Boot Options appear type in cd restore.
  5. Press Enter.
  6. Type in rstrui.exe and press Enter. win10-command-prompt Remove Contosor.exe
  7. In the System Restore Window, press Next.
  8. Choose restore point, and press Next . win10-restore Remove Contosor.exe
  9. Press Yes.

Step 3. Recover your data

Below are three ways you can attempt to recover files. However, depending on a few factors, they might not necessarily work for you. Thus, to ensure you do not lose your files, create copies of all important files and store them safely.

a) Method 1. File recovery via Data Recovery Pro

  1. You will need to download Data Recovery Pro from a reliable source.
  2. After installation, open the program and launch a scan. data-recovery-pro Remove Contosor.exe
  3. If encrypted files are recoverable, the program will allow you to do that.

b) Method 2. File recovery via Windows Previous Versions

If System Restore was enabled, file recovery via Windows Previous Versions is possible.
  1. Right mouse click on the file you want recovered.
  2. Properties → Previous versions. win-previous-version Remove Contosor.exe
  3. Select the version of the file you want, press Restore.

c) Method 3. File recovery via Shadow Explorer

Shadow copies are copies of your files that your computer automatically creates in order to ensure you do not lose anything in case of computer crash. However, some ransomware is sophisticated enough to delete them. If the ransomware that infected your computer did not do that, there should be no problem with file recovery.
  1. Download Shadow Explorer from shadowexplorer.com.
  2. Open the installed program, select the disk and the date. shadowexplorer Remove Contosor.exe
  3. If the folders/files appear, Export them.

Disclaimer
This site provides reliable information about the latest computer security threats including spyware, adware, browser hijackers, Trojans and other malicious software. We do NOT host or promote any malware (malicious software). We just want to draw your attention to the latest viruses, infections and other malware-related issues. The mission of this blog is to inform people about already existing and newly discovered security threats and to provide assistance in resolving computer problems caused by malware.

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