TrojanDownloader:MSIL/PureCrypter.B!MTB is a computer virus or malicious application that might prevent the user from accessing its data. This threat may be detected by other computer security programs such as MSIL, Flamingo, PWSX, Cryptor, or FileCoder. The computer user’s data is in danger if the antivirus program alerts you to the existence of TrojanDownloader:MSIL/PureCrypter.B!MTB, which poses a risk to the system. Therefore, it is advised to do a rapid, thorough examination in order to eradicate the virus and prevent any potential harm to the system or data.

Image of TrojanDownloader:MSIL/PureCrypter.B!MTB


TrojanDownloader:MSIL/PureCrypter.B!MTB often infiltrates a computer via phishing websites, torrent downloads, malicious links from community forums, and spam email messages. In order to prevent this virus from causing damage, including locking up important data on the computer, computer users must take urgent action to eradicate it.

How does it infect the computer?

TrojanDownloader:MSIL/PureCrypter.B!MTB uses a variety of techniques to propagate via the Internet. Malware bundles, cracked applications, web injectors, shady ads, social engineering assaults, and mass mailing methods are all possible routes for it to enter the computer. When the first Trojan infection obtains it from a distant site, TrojanDownloader:MSIL/PureCrypter.B!MTB may potentially be introduced into the computer by another Trojan download infection.

After being executed on a computer, TrojanDownloader:MSIL/PureCrypter.B!MTB will spew several harmful files into different directories, particularly Windows System. This virus will install a registry entry that will run malicious code every time Windows boots up in order to have an auto-boot feature. In order to receive more directives from attackers, TrojanDownloader:MSIL/PureCrypter.B!MTB may establish a connection to a distant server.

How does this malware operate?

The primary purpose of TrojanDownloader:MSIL/PureCrypter.B!MTB viruses are intended to infect computers and lock up valuable data. In addition to its primary function of extorting money, the virus is capable of a number of other harmful tasks, such as the following:

  • Take in a great deal of data from the computer.
  • Transfer the data you’ve gathered to a distant server.
  • Get an additional threat from a remote server and launch it.
  • Permit the remote attacker to take over the computer from a distance.


The inability to access files, particularly documents, images, spreadsheets, and similar data, is one clear indication of a file infection. Furthermore, antivirus applications will notify users as soon as they identify this virus.

Versions of TrojanDownloader:MSIL/PureCrypter!MTB
Version Name Alert Level Date Added
TrojanDownloader:MSIL/PureCrypter.C!MTB Severe Feb. 22, 2023
TrojanDownloader:MSIL/PureCrypter.B!MTB is also detected as:
Alibaba TrojanDownloader:MSIL/PureCrypter.bca0487f
Kaspersky Trojan-Downloader.MSIL.PureCrypter.x

For more help

TrojanDownloader:MSIL/PureCrypter.B!MTB is one of the numerous variants that belong to this specific virus family. To find the removal guidelines and individual threat types, browse our list of Trojan Downloader.

How to remove TrojanDownloader:MSIL/PureCrypter.B!MTB?

To totally remove TrojanDownloader:MSIL/PureCrypter.B!MTB from the computer and get rid of relevant viruses and trojans, please execute the procedures as stated on this page. Make sure that you have completely scanned the system with the suggested malware removal tools and virus scanners.

Quick Fix - Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted PC security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of hazardous viruses like TrojanDownloader:MSIL/PureCrypter.B!MTB through this procedure.

1. Download the application from the following page:

2. Save the file to your preferred location.

3. Double-click the downloaded file CCSetup.exe and install with the default settings.

CC for Windows Installation

4. At the end of the setup process, click Finish to run Combo Cleaner.

5. The tool will update the signature file, please wait for this process to complete.

6. To begin checking for threats like TrojanDownloader:MSIL/PureCrypter.B!MTB, click on the Start Scan button. Wait for this scan to finish.

CC for Windows Start Scan

7. At the end of the scan process, click on Remove all threats to delete the TrojanDownloader:MSIL/PureCrypter.B!MTB virus, including all malicious objects from the computer.

Free features of Combo Cleaner for Windows include Disk Cleaner, Big Files finder, Duplicate files finder, and Uninstaller. To use antivirus, privacy scanner, and to delete identified threats, users have to upgrade to a premium version.

Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the virus and malicious items linked to it.

Step 1 : Start Windows in Safe Mode With Networking

The method of running Windows in Safe Mode before running a virus scan is effective in getting rid of TrojanDownloader:MSIL/PureCrypter.B!MTB. This process can prevent most viruses and malware from loading, making it easier to detect and remove them.

1. On the Windows Search bar, please type msconfig.

Screenshot of MSConfig Command

2. Select and open System Configutation on the list of found results.

3. Once you are in the System Configuration window, go to the Boot tab.

Screenshot of SafeBoot

4. Under the Boot Options area, please check Safe Boot and select Network. This will allow Windows to boot in Safe Mode with Networking.

5. Lastly, click on Apply and OK to save the changes.

6. Please restart Windows.

Do not forget to restore the normal boot process of Windows after running the virus scan. Simply repeat the method above, and this time, uncheck the Safe Boot option to run Windows normally.

Step 2 : Run a virus scanner

To remove TrojanDownloader:MSIL/PureCrypter.B!MTB, we suggest that you scan the infected computer with this powerful virus removal tool. It can detect and get rid of Trojans, viruses, malware, and adware from the infected computer. To fully protect the computer against TrojanDownloader:MSIL/PureCrypter.B!MTB or similar attacks, you can activate Sophos to have real-time scanning and complete defense against all forms of threats.

1. Download Sophos Virus Removal Tool from the link below. Save the file on your computer where you can easily access it.

2. Once the download completes, browse the location of the file. Double-click to run the program and begin the install process.

3. On the first window of installation wizard, click Next to continue. Then, it will display the program’s License Agreement. You need to Accept the terms in order to proceed. If Windows prompts for User Account Control, please click Yes to proceed.

Screenshot of Sophos EULA Page

4. On succeeding windows, click Next or Continue to carry on with the installation. After completing the installation process, Launch Sophos Virus Removal Tool.

5. An internet connection is required when running this scanner in order to download important updates. Make sure that everything is up-to-date to effectively remove viruses like TrojanDownloader:MSIL/PureCrypter.B!MTB.

6. Click the Start Scanning button to  carry out the Scan. This will check the system for the presence of malicious objects, malware, and viruses. The tool reveals items that were found linked to TrojanDownloader:MSIL/PureCrypter.B!MTB and other suspicious entities. Be sure to remove all identified threats.

Screenshot of Sophos Virus Scan

After executing the above instructions, TrojanDownloader:MSIL/PureCrypter.B!MTB should have been completely removed from the computer. If there are still signs of infection or the computer is displaying unusual behaviors, please continue with the remaining procedures.

Another alternative for Windows 10/11 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Step 3 : Double Check with Windows Security Apps

Microsoft Windows has a built-in security application that you can use to double-check if your computer is still infected with TrojanDownloader:MSIL/PureCrypter.B!MTB. For Windows 10/11 users, please run Windows Security.

Windows 10 / 11 Instructions:

Windows Security is a free tool that was built to help you remove TrojanDownloader:MSIL/PureCrypter.B!MTB, viruses, and other malicious items from Windows 10/11 systems. Follow these procedures to scan your computer with the tool:

1. Tap or click the Search charm, search for Windows Security, and then open the application.

Image of Windows Security Search

2. On the Home tab, click Virus and threat protection from the sidebar.

3. On the main window, click on Scan Options. Then, click on Full Scan button.

Image of Scan Options

4. Lastly, click on the Scan now button to start scanning for the presence of TrojanDownloader:MSIL/PureCrypter.B!MTB. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to TrojanDownloader:MSIL/PureCrypter.B!MTB or not. You may now restart Windows to complete the virus removal process.

For older versions of Windows, you can scan the computer for free with the Microsoft Malicious Software Removal Tool (MSRT 64-Bit). It is a stand-alone virus scanner tool that targets prevalent malware groups.

How to protect the computer from TrojanDownloader:MSIL/PureCrypter.B!MTB?

The initial defense that comes to mind for any computer user is to install an anti-virus or anti-malware program. This move is sensible and probably the most practical way to protect the computer against a TrojanDownloader:MSIL/PureCrypter.B!MTB attack. Hence, keep in mind that having security software does not guarantee full protection. The majority of the prevention still lies in being cautious of users, and therefore, we are providing the following information as guidelines to protect the computer from virus infection.

Avoid Malicious Websites

There are enormous numbers of websites that were made for the primary purpose of spreading TrojanDownloader:MSIL/PureCrypter.B!MTB. Normally, these sites are involved in integrating malicious pop-up and browser hijacker, that will eventually cause further virus infections. Avoid such websites.

Ignore and Delete Phishing Emails

The mass-mailing of computer viruses gives the attackers the luxury of spreading their malicious code in just one send-off. This will arrive in the inbox as an email that appears to be from a legitimate organization. So, if you receive an unexpected email with a link or an attached file, better delete it immediately.

Do Not Click a Suspicious Link

Links from social media, forums, and blog sites are sometimes being utilized by attackers to drive web users to a malicious page that contains malicious code. Therefore, do not just click on any link, especially if it looks suspicious. Accidental access to the destination site may lead to a TrojanDownloader:MSIL/PureCrypter.B!MTB infection.

Be Careful When Downloading Files

Cracked software, serial key generators, and several freeware are seen as another method that spreads the TrojanDownloader:MSIL/PureCrypter.B!MTB virus. Avoid acquiring these types of applications, and if there is a need to download freeware or shareware, be sure to obtain it from the official website or trusted providers.

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