Trojan:MSIL/Lazy!MTB is a detection for a deadly virus that uses phishing schemes to infect the computer. This type of threat is disguised as a valid Windows or Program file. Online users are normally lured to download the file when they visit suspicious sites, particularly those that are involved in the piracy of movies and software. On the other hand, computer users may acquire the infection of Trojan:MSIL/Lazy!MTB when opening an infected email attachment sent out by hackers.

Image of Trojan:MSIL/Lazy!MTB

How does it infect the computer?

Trojan:MSIL/Lazy!MTB can infect the computer through file download and execution. The deceptive methods of attackers to lure users into such actions have been successful due to the application of phishing schemes. There are infection cases where a Trojan:MSIL/Lazy!MTB arrives at the computer through spam email messages posing as legitimate documents from a prominent organization.

Once Trojan:MSIL/Lazy!MTB is executed on the computer, it immediately drops a malicious file in the System folder of Windows. The creation of a registry entry follows, and this is meant to run Trojan:MSIL/Lazy!MTB on each Windows boot-up.

How does this malware operate?

The moment that Trojan:MSIL/Lazy!MTB is operational; it can perform different harmful actions, including the following:

  • Collect various data, like computer software and hardware.
  • Upload the gathered information to a remote server.
  • Communicate with a remote server and download more threats.
  • Open a backdoor port, giving a remote attacker access to the infected computer.


A Trojan:MSIL/Lazy!MTB infection can manifest through various symptoms on a computer. First, computer users may experience a sudden decline in system performance, such as slow response times and sluggishness, as Trojan:MSIL/Lazy!MTB often consumes significant resources. Second, frequent crashes or system instability may occur, disrupting normal operation. Third, unauthorized access to personal information and data theft are common Trojan behaviors, leading to potential privacy breaches. Furthermore, users might observe an influx of unsolicited pop-up ads or redirections to unfamiliar websites, signaling the presence of malicious activity. Additionally, unusual network behavior, such as increased data traffic or communication with suspicious servers, may indicate Trojan:MSIL/Lazy!MTB infection. Finally, changes in system settings, the appearance of unfamiliar programs, or disabled security software are red flags suggesting the need for thorough malware investigation and removal.

Versions of Trojan:MSIL/Lazy!MTB
Version Name Alert Level Date Added
Trojan:MSIL/Lazy.AMBA!MTB Severe Jan. 15, 2024
Trojan:MSIL/Lazy.PSBW!MTB Severe Dec 21, 2023
Trojan:MSIL/Lazy!MTB is also detected as:
Avast Win32:TrojanX-gen [Trj]
Avira HEUR/AGEN.1203561
BitDefender Gen:Variant.Lazy.148164
eScan Gen:Variant.Lazy.148164
Fortinet MSIL/Agent.VFA!tr
Kaspersky UDS:Trojan.Multi.GenericML.xnet
Malwarebytes Trojan.Crypt.MSIL
McAfee RDN/Generic.dx
TrendMicro TROJ_GEN.R035C0PDI22

For more help

Trojan:MSIL/Lazy!MTB threat family has disclosed various threats to the public. To access similar threats and effective removal methods, refer to the Trojan category.

How to remove Trojan:MSIL/Lazy!MTB?

To totally remove Trojan:MSIL/Lazy!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.

Step 1 : Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted computer security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of computer virus like Trojan:MSIL/Lazy!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.

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

5. The tool will update the database file; please wait for this process to complete.

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

Screenshot of Combo Cleaner PC

7. At the end of the scan process, click on Remove all threats to delete Trojan:MSIL/Lazy!MTB malware, including all malicious objects from the computer.

To fully optimize the features of antivirus and privacy scanners, users may have to upgrade to the premium version.

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

Step 2 : 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 Trojan:MSIL/Lazy!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 Win 11 Search

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 Msconfig Win 11

4. Under the Boot Options area, please check Safe Boot so that it starts in Safe Mode after restarting.

5. Next, select Network. This will allow Windows to boot in Safe Mode with Networking.

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

7. 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 3 : Run Sophos Home Virus Scanner

To remove Trojan:MSIL/Lazy!MTB automatically, scanning the computer with this powerful virus and malware removal tool is recommended. This scanner does not just uncover known threats like viruses or malware; it is also effective in discovering harmful files associated to Trojan:MSIL/Lazy!MTB.

1. Please click on the link below to download the program.

2. After downloading, locate the file SophosInstall.exe in the Downloads folder.

3. Install by double-clicking on the file.

4. If it prompts "Do you want to allow this app to make changes on your device?" please click Yes.

5. Next, it will display the Terms and Conditions page. Click the Install button to begin.

Screenshot of Terms by Sophos Home

6. Run the installation with the default settings. Please note that an internet connection is required in order to download important updates.

7. After finishing the installation, you must login to the dashboard. If you already have a Sophos account, please login. Otherwise, please enter your details and click on the Create Account button.

8. Once you are in the Sophos Home console, click the Scan button to start checking the computer for Trojan:MSIL/Lazy!MTB components.

Screenshot of Sophos Home

9. Scanning may take a while; please wait for this process to finish.

10. After scanning the computer, Sophos Home will start cleaning or deleting files infected with Trojan:MSIL/Lazy!MTB.

11. You may now close Sophos Home. The computer is now free from Trojan:MSIL/Lazy!MTB, as well as associated malware and viruses.

After executing the above instructions, Trojan:MSIL/Lazy!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 4 : 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 Trojan:MSIL/Lazy!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 Trojan:MSIL/Lazy!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 and search for Windows Security

2. Click Open to run the program.

Screenshot of Win 11 Search

3. On the Dashboard, click Virus and threat protection from the sidebar.

Screenshot of Win 11 Virus Protection

4. On the right panel, click on Scan Options to see different levels of checking the computer.

5. Next, please select Full Scan button.

Screenshot of Full Scan Win 11

6. Lastly, click on the Scan now button to start scanning for the presence of Trojan:MSIL/Lazy!MTB. The process may take a while to complete.

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

For Windows 8.1 and Windows 7, 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.

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