Trojan:JS/Kovter.A is a threat identified by Microsoft Security Software. This is typical malware that targets the core system of Windows in order to complete its tasks. Trojan:JS/Kovter.A was made to execute a series of commands once it got inside the system. It will gather data like system settings, Windows version, network configuration, and so on. The collected data will be sent to a remote attacker for analysis.

As soon as an antivirus program detects the existence of Trojan:JS/Kovter.A, computer users must take immediate action to eliminate the threat. Scanning the computer thoroughly is the best course of action for a virus infection like this.

Image of Trojan:JS/Kovter.A

How does it infect the computer?

In general, the system will get infected with Trojan:JS/Kovter.A if malicious code is executed on the computer. The source of this Trojan may vary due to the changing ways in which it is deployed. Typically, spam email messages disguised as open letters from reputable institutions are used to deceive recipients. The body of the message contains enticing phrases that try to convince the user to open the attached file.

Malicious links from social media sites and instant messaging programs are also seen as methods used in distributing Trojan:JS/Kovter.A. Illegally distributed software and media materials may also contain code that can lead to the infection of this malware.

How does this malware operate?

In order to run itself on Windows start-up, Trojan:JS/Kovter.A will make a copy of itself under system files. Then, a registry entry is created to call the file on each Windows boot-up. Apart from that, this malware will also drop non-malicious files in various folders of the compromised PC.

Trojan:JS/Kovter.A occasionally connects to a remote host to execute tasks like the following:

  • Notify attacker of the new infection
  • Sends gathered data from the infected computer
  • Download and execute additional files, including an updated version of the Trojan
  • Accept command from a remote attacker


There are not many obvious symptoms of this malware. Trojan:JS/Kovter.A operates silently in the background. However, Microsoft Security Software may alert you to the presence of this Trojan.

Trojan:JS/Kovter.A is also detected as:
Avast Win32:Evo-gen [Trj]
BitDefender Gen:Variant.Fugrafa.70919
ESET-NOD32 Win32/Kovter.A
F-Secure Trojan.TR/Kazy.onbeubba
Fortinet W32/Kovter!tr
Kaspersky HEUR:Trojan.Win32.Generic
Malwarebytes Malware.AI.188926334
McAfee Trojan-FEXC!BC8E0C39CC66
Panda Trj/Genetic.gen
Sophos Mal/Generic-S
Symantec ML.Attribute.HighConfidence
TrendMicro TROJ_SPNR.29K914

How to remove Trojan:JS/Kovter.A?

To totally remove Trojan:JS/Kovter.A 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:JS/Kovter.A 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:JS/Kovter.A, 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:JS/Kovter.A 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 Trojan:JS/Kovter.A. 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 Trojan:JS/Kovter.A, 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:JS/Kovter.A 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:JS/Kovter.A.

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:JS/Kovter.A and other suspicious entities. Be sure to remove all identified threats.

Screenshot of Sophos Virus Scan

After executing the above instructions, Trojan:JS/Kovter.A 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 Trojan:JS/Kovter.A. 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:JS/Kovter.A, 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 Trojan:JS/Kovter.A. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to Trojan:JS/Kovter.A 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 Trojan:JS/Kovter.A?

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:JS/Kovter.A 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:JS/Kovter.A. 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:JS/Kovter.A infection.

Be Careful When Downloading Files

Cracked software, serial key generators, and several freeware are seen as another method that spreads the Trojan:JS/Kovter.A 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.

About the author

13 thoughts on “Trojan:JS/Kovter.A”

  1. Defender is not removing JS/Kovter.A virus from my laptop, although I’ve tried numerous times.

  2. This has been driving me crazy since Christmas Day. I’d be notified, I’d give Defender the go ahead to clean it up, and then then I’d be asked to send the info to Microsoft. Every day since Christmas. Finally I reinstalled Malwarebytes (thanks so much for uninstalling it, Best Buy), and at this point (fingers crossed) things may be okay.


    I have tried everything to remove the Kovter.a virus, Nothing works. Anyone have any new ideas?


  4. GUYS! This does work, but you need to run MSE Quick/Full scan with no internet connection. MSE knows that it will replicate with an internet connection and isn’t able to get rid of it, that’s why it doesn’t work. Just disable your internet adapter temporarily and then run the scan. It will work.

  5. I disabled my internet connection, did the quick scan and MSE is still saying additional cleaning is required and that I need to download Microsoft Defender Offline… yet when I tried that MDOffline just froze. I will see if a Full Scan changes anything…
    … well I did the Full Scan with my internet connection still disabled… and still nothing!
    This thing will live on my computer forever!

  6. Every day I get kovter.a on my win 10 pc. Defender finds it, deletes it, reboots and defender sits. I get this virus while NOT at home on PC! I clean it before I go to work. Come home and defender has found it again. Nobody is on my pc from time I leave until I come home. Microsoft must have isolated websites & software suspicious for this virus distribution! Publish a list so I can remove software and/or avoid sites!

  7. Ok so I did some more research and I downloaded Malwarebytes Anti-Malware, it scanned and found 8 threats which it then deleted… I wanted to double check so I ran MSE again and this time it came up completely clean!! I think this has solved it for now!

Leave a Comment

Your email address will not be published. Required fields are marked *