Trojan:Win32/StealC!MSR is a detection by Microsoft Defender Antivirus for a computer threat that possesses illegal data collection on the infected system. If antivirus software displays an alert about Trojan:Win32/StealC!MSR, it indicates that sensitive computer data is at risk. It can steal information such as user names, passwords, contact information, and banking information. As a result, it is recommended that the computer be properly analyzed to eliminate this threat and prevent the theft of personal information.

Image of Trojan:Win32/StealC!MSR

How does it infect the computer?

Trojan:Win32/StealC!MSR may come to the computer as an abandoned threat from another Trojan horse. Multiple instances of infection are attributed to an accidental visit to a malicious website when the user encounters browser redirect adware. The destination site uses a player download technique that allows Trojan:Win32/StealC!MSR to enter the computer.

The virus also spreads through other channels, such as spam, malware bundles, fake software updates, and pirated software. It is therefore essential to stay away from these sources to avoid infecting the computer with the Trojan:Win32/StealC!MSR virus.

If Trojan:Win32/StealC!MSR could infect the computer; it may perform a number of malicious actions based on the command it receives from a remote attacker. Furthermore, the malicious file is injected into the computer with the associated registry entry, which runs the infected executable file on every Windows boot.

It works as a hidden threat to system processes, so there is a probability that some antivirus applications may not detect this virus. Luckily, most computer security programs can detect and remove Trojan:Win32/StealC!MSR.

How does this malware operate?

Trojan:Win32/StealC!MSR is a malicious program created by hackers. The intent is to infect the computer so that it can undertake malicious actions, including the following:

  • Download more malware from the infected computer.
  • Contact the remote server and update the existing infection.
  • Collect precious data like operating system version, ISP, IP address, and the like.
  • Periodically sends the collected data to a specific server.


This virus was designed to operate discreetly on the computer; therefore, users may not recognize its presence merely by observing the system’s behavior. The presence of Trojan:Win32/StealC!MSR on the computer may only be revealed if an antivirus program shows an alert message.

Trojan:Win32/StealC!MSR is also detected as:
Avast Win32:PWSX-gen [Trj]
BitDefender Trojan.Ransom.Loki.ALY
ESET-NOD32 A Variant Of Win32/Kryptik.HTRL
F-Secure Trojan.TR/AD.Stealc.ereio
Fortinet W32/Kryptik.HTRK!tr
Ikarus Trojan-Spy.Agent
Kaspersky HEUR:Backdoor.Win32.Mokes.pef
Malwarebytes Generic.Crypt.Trojan.DDS
Panda Trj/RansomGen.A
Sophos Troj/Krypt-XU
TrendMicro TrojanSpy.Win32.STEALC.A

For more help

Trojan:Win32/StealC!MSR belongs to a group of spyware programs that endanger the online privacy and security of computer users. To view similar threats, please browse the Trojan Spy category.

How to remove Trojan:Win32/StealC!MSR?

To totally remove Trojan:Win32/StealC!MSR 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 Trojan:Win32/StealC!MSR 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 Trojan:Win32/StealC!MSR, 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 Trojan:Win32/StealC!MSR 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

Windows 10 / 11 Guide

1. Click on the Windows logo and select the Power icon when options pop up.
2. Select Restart from the options while pressing the Shift key on the keyboard.
3. Choose an Option window will appear. Select the Troubleshoot button.
4. In next window, please choose the Advanced Option.
5. On the Advanced Option window, click on Startup Settings, and then, click the Restart button to reboot the computer.
6. When Windows boots in Startup Settings, press the function key F5 or number 5 on the keyboard.

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

Windows 8 Guide

1. Click the Windows Start icon in the lower left section of the screen.
2. Open the Search window and type Advanced in the field. It will open General PC Settings.
3. Click on Advanced Startup, and then click on the Restart Now button.
4. Once the computer starts in the Advanced Startup option menu, select Troubleshoot.
5. Next, click on Advanced Options to reveal the next section.
6. Click Startup settings, and then click the Restart button to boot the PC in Startup Settings.
7. Use function key F5 or number key 5 to Enable Safe Mode with Networking.

Step 2 : Run a virus scanner

To remove Trojan:Win32/StealC!MSR, 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 Trojan:Win32/StealC!MSR 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 Trojan:Win32/StealC!MSR.

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 Trojan:Win32/StealC!MSR and other suspicious entities. Be sure to remove all identified threats.

Screenshot of Sophos Virus Scan

After executing the above instructions, Trojan:Win32/StealC!MSR 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.

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 Trojan:Win32/StealC!MSR. For Windows 8 and 10/11 users, please run Windows Security. Users of Windows Vista and older versions can utilize Microsoft Security Essentials to remove the Trojan:Win32/StealC!MSR virus.

Windows 8 / 10 / 11 Instructions:

Windows Security is a free tool that was built to help you remove Trojan:Win32/StealC!MSR, viruses, and other malicious items from Windows 8 or 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 Trojan:Win32/StealC!MSR. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to Trojan:Win32/StealC!MSR or not. You may now restart Windows to complete the virus removal process.

How to protect the computer from Trojan:Win32/StealC!MSR?

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 Trojan:Win32/StealC!MSR 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 Trojan:Win32/StealC!MSR. 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 Trojan:Win32/StealC!MSR infection.

Be Careful When Downloading Files

Cracked software, serial key generators, and several freeware are seen as another method that spreads the Trojan:Win32/StealC!MSR 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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