Backdoor:MSIL/Quasar.GG!MTB Virus Removal Guide

The Backdoor:MSIL/Quasar.GG!MTB alert, is a sign that your computer has a problem. Allowing it to run may lead to really bad consequences.

Quasar.GG!MTB stands for a QuasarRAT malware family – an exceptionally dangerous remote access trojans. Certain computer viruses can operate without the user’s knowledge, such as RATs like Quasar. These viruses are designed to create a remote connection to the infected system and can be used in staged attacks. Once installed, Backdoor:MSIL/Quasar.GG!MTB can perform a variety of malicious activities, including:

• Stealing your personal information, such as passwords, credit card numbers, and Social Security numbers
• Spying on your online activity
• Installing other malware on your computer
• Using your computer to launch attacks against other computers
• Disabling your computer’s security features

It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.

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How to remove the Backdoor:MSIL/Quasar.GG!MTB from my PC?

Quasar.GG!MTB malware is incredibly difficult to remove manually. It places its documents in multiple places throughout the disk, and can recover itself from one of the elements. Additionally, a range of modifications in the windows registry, networking configurations and also Group Policies are really hard to find and change to the initial. It is much better to use a specific program – exactly, an anti-malware program. GridinSoft Anti-Malware will fit the best for malware removal reasons.

Why GridinSoft Anti-Malware? It is pretty light-weight and has its detection databases updated nearly every hour. Furthermore, it does not have such problems and exploits as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware ideal for clearing away malware of any type.

Manual Backdoor:MSIL/Quasar.GG!MTB Removal

You can remove Quasar.GG!MTB manually, through the system Settings app. Click the Windows button with the right mouse button and find Settings in the appeared list. In Settings, go to Apps → Installed Apps menu.

There, find the apps you do not remember installing. If you know a specific one that Avast/AVG is complaining on with the Win32/Uwamson detection, seek for them. Click the three-dot symbol to the right, and then choose “Uninstall”.

Remove Backdoor:MSIL/Quasar.GG!MTB with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common Backdoors as shown from our tests with the software, and we assure you that it can remove Backdoor:MSIL/Quasar.GG!MTB as well as other malware hiding on your computer.

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website gridinsoft.com.

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.

3.Follow the installation setup wizard's instructions diligently.

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “Backdoor:MSIL/Quasar.GG!MTB” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website (gridinsoft.com) and download Trojan Killer to a computer that is not infected.

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing Backdoor:MSIL/Quasar.GG!MTB and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

Reset your browser settings

As Quasar.GG!MTB may modify your browser settings, it is recommended to turn them back to factory settings. You can do it both manually and with the help of GridinSoft Anti-Malware.

Reset your browsers with GridinSoft Anti-Malware

To reset your browser with GridinSoft Anti-Malware, open the Tools tab, and click the “Reset browser settings” button.

You may see the list of options for each browser. By default, they are set up in a manner that fits the majority of users. Press the “Reset” button (lower right corner). In a minute your browser will be as good as new.

The browser reset is recommended to perform through the antivirus tool by GridinSoft, because the latter is also able to reset the HOSTS file without any additional commands.

Reset your browsers manually

To reset Edge, do the following steps:

1. Open “Settings and more” tab in upper right corner, then find here “Settings” button. In the appeared menu, choose “Reset settings” option:

2. After picking the Reset Settings option, you will see the following menu, stating about the settings which will be reverted to original:

For Mozilla Firefox, do the next actions:

1. Open Menu tab (three strips in upper right corner) and click the “Help” button. In the appeared menu choose “troubleshooting information”:

2. In the next screen, find the “Refresh Firefox” option:

After choosing this option, you will see the next message:

If you use Google Chrome

1. Open Settings tab, find the “Advanced” button. In the extended tab choose the “Reset and clean up” button:

2. In the appeared list, click on the “Restore settings to their original defaults”:

3. Finally, you will see the window, where you can see all the settings which will be reset to default:

Opera can be reset in the next way

1. Open Settings menu by pressing the gear icon in the toolbar (left side of the browser window), then click “Advanced” option, and choose “Browser” button in the drop-down list. Scroll down, to the bottom of the settings menu. Find there “Restore settings to their original defaults” option:


2. After clicking the “Restore settings…” button, you will see the window, where all settings, which will be reset, are shown:

When the browsers are reset, you need to ensure that your browser will connect the right DNS while connecting to the web page you need. Create a text file titled “hosts” on your pc’s desktop, then open it and fill it with the following lines¹:

1. Official Microsoft guide for hosts file reset.