JS/Chromex.Agent.BZ is a detection for malicious JavaScript files. This virus is capable of doing so many malicious things on the computer. It can accept commands from a remote hacker and execute them on the infected computer to further compromise the system. Most of the time, JS/Chromex.Agent.BZ is detected on computers that pay a visit to a malicious website which can drop a copy of the virus using a drive-by-download scheme. Once the threat is inside the computer, it can perform various malicious actions to add additional malware, especially the dreaded ransomware virus.

Illustration for JS/Chromex.Agent.BZ

How does it infect the computer?

JS/Chromex.Agent.BZ commonly spreads via infected websites and dubious pages put up by the attackers. The suspicious website can run a web injector to install the virus on the internet browser program, and from there, it can exploit the vulnerabilities to further infect the computer with additional viruses.

The JavaScript code of JS/Chromex.Agent.BZ is able to infect various executable files on the computer, particularly Portable Executable (PE) data. It can also operate as a network worm, wherein it can contaminate computers that are connected to a network environment. By integrating itself into more files inside the computer or network systems, infection multiplies as computer users run the host-infected file.

How does this malware operate?

Hackers developed JS/Chromex.Agent.BZ primarily to infect the computer and partly control it from a remote location. This is a detection pertains to the relevant computer threat that is in the form of JavaScript. When it runs on the system, it can download additional malware from a remote location, particularly ransomware viruses. With the capability of spreading over the network by infecting executable files, JS/Chromex.Agent.BZ can rapidly get inside multiple computers through its local connection.


One of the visible symptoms of JS/Chromex.Agent.BZ infection is the constant redirection on the internet browser programs. Users will be forced to visit several web pages that are relevant to the virus, and attempts will be made to lure them to download a file that could lead to adware, malware, or computer virus infections. The same objective applies to the aggressive pop-up advertisements that will show up on the computer if it is infected with JS/Chromex.Agent.BZ

Aside from the browser issues, security programs, especially ESET will display a warning stating the following:

Threat Removed
A threat JS/Chromex.Agent.BZ was found in a file that Google Chrome tried to access.
The file has been deleted.

How to remove JS/Chromex.Agent.BZ?

To totally remove JS/Chromex.Agent.BZ 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 JS/Chromex.Agent.BZ 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 JS/Chromex.Agent.BZ, 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 JS/Chromex.Agent.BZ virus, 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 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 JS/Chromex.Agent.BZ. 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 Sophos Home Virus Scanner

To remove JS/Chromex.Agent.BZ, 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 JS/Chromex.Agent.BZ or similar attacks, you can activate Sophos to have real-time scanning and complete defense against all forms of threats.

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 Sophos Home Terms and Conditions

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 dashboard, click the Scan button to start checking the computer for JS/Chromex.Agent.BZ components.

Screenshot of Sophos Home Dashboard

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 JS/Chromex.Agent.BZ.

11. You may now close Sophos Home. The computer is now free from JS/Chromex.Agent.BZ, as well as associated malware and viruses.

After executing the above instructions, JS/Chromex.Agent.BZ 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 JS/Chromex.Agent.BZ. 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 JS/Chromex.Agent.BZ, 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 JS/Chromex.Agent.BZ. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to JS/Chromex.Agent.BZ 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.

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