Trojan:JS/FakeUpdate is a type of JavaScript-based scam that mimics a fake software update prompt on a webpage. It is designed to deceive users into clicking on the deceptive update notification, leading them to potentially harmful websites or triggering the download of malicious content. The goal of Trojan:JS/FakeUpdate is to exploit user trust and vulnerabilities to deliver malware or engage in other fraudulent activities.

Image of Trojan:JS/FakeUpdate

How does it infect the computer?

Once a user interacts with Trojan:JS/FakeUpdate and initiates its installation, the behavior typically involves deceptive tactics to mislead and compromise the affected system. After installation, Trojan:JS/FakeUpdate may exhibit the following behaviors:

  • Fake Update Prompts: Trojan:JS/FakeUpdate may continue to display convincing fake software update prompts on the user’s browser or system. These prompts often mimic legitimate update notifications to trick users into clicking on them.
  • Redirection to Malicious Sites: The script may redirect the user to malicious websites designed to deliver further malware, phishing scams, or other fraudulent content. These sites could exploit vulnerabilities in the user’s browser or attempt to gather sensitive information.
  • Malware Downloads: Trojan:JS/FakeUpdate might facilitate the download and installation of actual malware onto the user’s system. This could include viruses, ransomware, or other malicious software, depending on the intentions of the attacker.
  • Browser Manipulation: The script may manipulate browser settings by injecting unwanted extensions or plugins, altering the homepage, or changing search engine preferences. This can lead to a compromised browsing experience and expose the user to additional security risks.

How does this malware operate?

The payload of Trojan:JS/FakeUpdate typically involves the execution of malicious scripts that deceive users into believing they are encountering a legitimate software update. These scripts often create a convincing fake update notification on a webpage, prompting users to click on it. Upon interaction, the payload may redirect users to malicious websites, initiate the download of malware, or execute other harmful actions, compromising the security and privacy of the affected system. The specific payload can vary, but the primary aim is to exploit user trust, deliver malicious content, or engage in fraudulent activities.


Trojan:JS/FakeUpdate exhibits symptoms such as persistent and deceptive fake software update prompts appearing on webpages or within the user’s browser. Users may experience automatic redirection to malicious websites, leading to potential exposure to further scams or malware. The script may manipulate browser settings, alter the homepage, search engine preferences, or inject unwanted extensions. Trojan:JS/FakeUpdate can initiate the download and installation of actual malware onto the user’s system, compromising overall security. Some variants may engage in unauthorized data harvesting, putting user privacy at risk by collecting sensitive information for malicious purposes.

Versions of Trojan:JS/FakeUpdate
Version Name Alert Level Date Added
Trojan:JS/FakeUpdate.C Severe Apr. 12 , 2022
Trojan:JS/FakeUpdate is also detected as:
Avast Win32:FakeUpdate-C [Trj]
BitDefender Generic.MSIL.Bladabindi.B6D98624
ESET-NOD32 A Variant Of MSIL/Bladabindi.BB
F-Secure Generic.MSIL.Bladabindi.B6D98624
Fortinet MSIL/Bladabindi.BB!tr
Kaspersky HEUR:Trojan.Win32.Generic
Malwarebytes Backdoor.Bladabindi
McAfee RDN/Generic BackDoor
TrendMicro Trojan.Win64.FAKEUPDATE.AA

For more help

Multiple versions from a threat family, which includes Trojan:JS/FakeUpdate, have been made public. To see related threats and appropriate removal techniques, please browse the Trojan Script category.

How to remove Trojan:JS/FakeUpdate?

To totally remove Trojan:JS/FakeUpdate 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:JS/FakeUpdate 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:JS/FakeUpdate, 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:JS/FakeUpdate 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:JS/FakeUpdate. 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:JS/FakeUpdate 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:JS/FakeUpdate.

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:JS/FakeUpdate 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:JS/FakeUpdate.

11. You may now close Sophos Home. The computer is now free from Trojan:JS/FakeUpdate, as well as associated malware and viruses.

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

7. After the scan, Delete/Quarantine identified threats, whether they were relevant to Trojan:JS/FakeUpdate 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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