Hoax.JS.ExtMsg.a is a cunning strategy employed by cybercriminals to deceive users. It tricks them into believing that a seemingly harmless file or program is benign when, in reality, it harbors malicious JavaScript code. This type of Trojan disguises itself as legitimate software or files, often mimicking popular applications or enticing content. Unsuspecting users may unwittingly download and execute these files.

Once executed, Hoax.JS.ExtMsg.a can carry out various malicious activities, including stealing sensitive information, compromising system security, or facilitating further malware infections. Its effectiveness lies in exploiting human trust and curiosity. Users tend to be less cautious when downloading seemingly harmless files from sources they perceive as safe. However, falling victim to Hoax.JS.ExtMsg.a can have serious consequences, ranging from data breaches and financial losses to system damage and identity theft.

Illustration for Hoax.JS.ExtMsg.a

How does it infect the computer?

Hoax.JS.ExtMsg.a infiltrates computers using deceptive methods, often masquerading as legitimate software or enticing content. Cybercriminals distribute this Trojan through email attachments, malicious websites, or file-sharing networks, skillfully employing social engineering tactics to deceive users into downloading and executing the malware. Once activated, Hoax.JS.ExtMsg.a can exploit system vulnerabilities or manipulate user permissions, granting it unauthorized access to carry out its malicious activities without detection.

How does this malware operate?

After infecting a computer, Hoax.JS.ExtMsg.a operates stealthily, often initiating its malicious activities without the user’s awareness. It may establish persistence by modifying system settings or creating hidden files to evade detection by antivirus software. Depending on its design, Hoax.JS.ExtMsg.a can perform a range of harmful actions, such as stealing sensitive information like passwords or financial data, hijacking the user’s browsing sessions, or remotely controlling the infected system. Additionally, Hoax.JS.ExtMsg.a may serve as a backdoor for cybercriminals, allowing them to execute further attacks or deploy additional malware onto the compromised computer.

Hoax.JS.ExtMsg.a may also attempt to spread itself across the network or to other connected devices, propagating its infection to maximize its impact. By remaining hidden and operating discreetly, the malware can evade detection for an extended period, enabling cybercriminals to carry out their malicious objectives while avoiding detection and remediation efforts.


Hoax.JS.ExtMsg.a infection manifests through several key symptoms, including:

  • Unanticipated System Behavior: Users may experience sudden slowdowns, frequent crashes, or encounter unusual error messages.
  • Unauthorized Access: Suspicious activity involving unauthorized access to sensitive information or accounts might occur, indicating potential data theft or other illicit actions.
  • Unfamiliar Programs or Files: The presence of unknown programs, files, or processes on the computer could signal an infection by Hoax.JS.ExtMsg.a.

For more help

Hoax.JS.ExtMsg.a is just one of the many variations of a computer virus that utilizes a malicious script in order to perform malevolent actions on the computer. A list of Trojan Script is provided on this website, along with respective removal guides that victims can use to eliminate the threat.

How to remove Hoax.JS.ExtMsg.a?

To totally remove Hoax.JS.ExtMsg.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.

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 Hoax.JS.ExtMsg.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.

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 Hoax.JS.ExtMsg.a, 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 Hoax.JS.ExtMsg.a 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 Hoax.JS.ExtMsg.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 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 Hoax.JS.ExtMsg.a 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 Hoax.JS.ExtMsg.a.

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 Hoax.JS.ExtMsg.a 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 Hoax.JS.ExtMsg.a.

11. You may now close Sophos Home. The computer is now free from Hoax.JS.ExtMsg.a, as well as associated malware and viruses.

After executing the above instructions, Hoax.JS.ExtMsg.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 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 Hoax.JS.ExtMsg.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 Hoax.JS.ExtMsg.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 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 Hoax.JS.ExtMsg.a. The process may take a while to complete.

7. After the scan, Delete/Quarantine identified threats, whether they were relevant to Hoax.JS.ExtMsg.a 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.

About the author

Leave a Comment

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