QuasarRAT Removal Guide

Do you know what QuasarRAT is?

According to our cybersecurity experts, QuasarRAT is a highly malicious computer infection that can infect your PC by stealth and then perform one or several of its malicious actions. There are many variations of this Trojan because it is an open-source Trojan available for all to get and modify to suit their needs. If your PC becomes infected with this Trojan, then your system and your privacy can become compromised. Therefore, we recommend that you remove it from your PC as soon as you notice it and get an anti-malware program to protect your PC from similar software infecting it in the future.

Let us jump right into the things QuasarRAT can do on an infected PC. Again, there are many variations of it created and released by different people, so the list of functions it can perform varies between iterations. Research has revealed that this Trojan can be configured to collect information about your system and download and upload files from and to your computer secretly. Trojans such as QuasarRAT are often used to infect computers with ransomware that usually encrypts files or locks the screen and demands that you pay a ransom. It can also manage startup settings and prevent particular programs and services from launching. It can also access Task Manager and end certain processes.

Furthermore, it can modify Windows registry settings, reverse proxy settings, open a remote desktop connection, restart or shut down your PC without permission. Moreover, cybercriminals can spy on you as this Trojan can be configured to let them observe your desktop actions. It can also be set to issue remote mouse clicks and keystrokes. Also, it can log your keystrokes to obtain passwords, logins, and other information you enter with your keyboard.

As mentioned, QuasarRAT is an open source Trojan that is a publicly available commodity RAT (Remote Access Trojan) that was coded in C#. Researchers say that it is a newer version of xRAT, a Trojan created by a German developer. QuasarRAT was first released in 2014 and has been re-released by cybercriminals who added new features and functions and modified it to suit their requirements for performing illegal activities. Since there are so many iterations, the distribution methods vary with each case. Our researchers have tested several versions, and they are dropped in different locations, and their executable files have different names. See the list below which contains the file paths of the malicious executables.

  • %APPDATA%\Microsoft\MicrosoftUP.exe
  • %APPDATA%\system\core.exe
  • %WINDIR%\SysWOW64\SubDir\Client.exe
  • %PROGRAMFILES(x86)%\[random characters]\servce.exe

As you can see, it can be placed in hidden folders as well as regular ones, and the names of its executables are rather unassuming, so they could pass as regular programs.

In closing, QuasarRAT is a dangerous computer infection that can cause much trouble for you as it can steal your personal information and infect your PC with more malware. Therefore, if you want to restore your computer’s security, then you obviously have to remove this malicious program as soon as possible. See the guide below on how you can delete it manually. If you cannot find the malware, however, then get an anti-malware program such as SpyHunter to remove it for you.

Removal Instructions

  1. Simultaneously hold down Win+E keys.
  2. Enter each of the following file paths in the File Explorer’s address box.
    • %APPDATA%\Microsoft
    • %APPDATA%\system
    • %WINDIR%\SysWOW64\SubDir
    • %PROGRAMFILES(x86)%\[random characters]
  3. Find MicrosoftUP.exe, core.exe, Client.exe or servce.exe
  4. Right-click the executable file and click Delete.
  5. Empty the Recycle Bin.

In non-techie terms:

Our cybersecurity experts say that QuasarRAT is a dangerous computer infection because it can perform many malicious actions on your PC that can compromise its security and your privacy. Therefore, it is of utmost importance that you remove it from your computer as soon as the opportunity arises.