Home > Trojan > “Suspicious Surfing Behavior” Captcha Miner Virus – How to Remove It

“Suspicious Surfing Behavior” Captcha Miner Virus – How to Remove It

This article has been created in order to explain the idea behind the “Your Device is Showing Supsicious Surfing Behaviour” Scam and how to remove this pop-up from your web browser.

A new scam promoting a browser redirect web page, which accuses the user of “suspicious surfing behavior” has been reported by cyber-security researchers. The pop-up displays a screen which begins to mine for the cryptocurrency Monero as the victim sits and does absolutely nothing. The pop-up asks from victims to type a captcha in order to discontinue the mining operation, however many have reported this not to be advisable as a course of action. If you have started seeing pop-ups accusing you of suspicious browsing behavior, such as the one on the picture on the right, we recommend that you read the following article in order to learn how to stop seeing such pop-ups in the future.

Threat Summary

Name “Suspicious Surfing Behavior”
Type PUA/Miner
Short Description Aims to mine for various different cryptocurrencies as a result of a browser redirect, caused by unwanted advertisements or banners.
Symptoms Random browser redirects caused by unwanted program residing on the victim’s computer.
Distribution Method Via bundled installers, fake setups or via other PUP that has already been installed on your PC.
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join Our Forum to Discuss “Suspicious Surfing Behavior”.

“Suspicious Surfing Behavior” – Distribution Methods

“Suspicious Surfing Behavior” pop-up may have found itself on your PC as a result of you visiting a website that may have the JavaScript code in it, causing browser redirects to such suspicious and malicious web links.

Another method by which this browser redirect may have situated itself onto your computer system is via a potentially unwanted program, whose primary purpose is to display such redirects as a result of a scheme that generates funds to it’s creators. Such unwanted software is usually spread when you download the setup of a free program which you may be looking for online, such as a free extension or a free media player, torrent downloader or other type of freewar. What happens is that most sites “advertise” ad-supported programs since this is one way to generate income. And some of those sites do not mind what types of programs they advertise as long as the publishers of freeware get paid.

“Suspicious Surfing Behavior More Information

As soon as it find itself on your computer system this program’s primary purpose is to inject JavaScript. This JavaScript aims to attack your CPU and GPU and use them in order to perform the so-called hashing operation, which is basically the mining procedure for the Monero cryptocurrency. Monero usually overloads the GPU (VideoCard) of the computers in which it is mined, since it’s most often used mining algorithm is called “Cryptonight” and it is used by many legitimate miners as well. What the first activity of this JavaScript is, is to connect your computer to various different types of CryptoCurrency mining pools – virtual places where the infected computers combine mining power in order to generate more of the Monero tokens which the miner hashes for.

The pop-up itself aims to get victims to write down captcha in order to stop it, however we’d advise against It as this may lead to more problems for your computer. Instead, since the Monero miner may lead to more trouble on your computer, we’d advise you to remove it as soon as possible, preferrably by following the instructions below.

Remove “Suspicious Surfing Behavior” Miner from Your Compter

Since this miner may also be associated with other types of unwanted software and malware which can also obtain your crucial information, like web passwords keystrokes you have typed and other info, we would advise that you follow the removal instructions down below to discontinue the software causing these pop-ups to appear. If the manual removal does not solve your issue, be advised that security experts often advise removing the malware automatically by scanning your computer with an advanced anti-malware software. Such will make sure that the “Suspicious Surfing Behavior” miner is fully gone from your PC and it stays protected against various forms of online threats and the newest malware at all times.

Delete “Suspicious Surfing Behavior” from Windows and Your Browser

1.Remove or Uninstall “Suspicious Surfing Behavior” in Windows

Remove or Uninstall “Suspicious Surfing Behavior” in Windows.

Step 1: Remove/Uninstall “Suspicious Surfing Behavior” in Windows

Here is a method in few easy steps to remove that program. No matter if you are using Windows 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program get left behind, and that can lead to unstable work of your PC, mistakes with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

  • Hold the Windows Logo Button and “R” on your keyboard. A Pop-up window will appear (fig.1).
  • uninstall-virus-fig1

  • In the field type in “appwiz.cpl” and press ENTER (fig.2).
  • uninstall-virus-fig2

  • This will open a window with all the programs installed on the PC.
    Select the program that you want to remove, and press “Uninstall” (fig.3).
  • uninstall-virus-fig3

    Follow the instructions above and you will successfully uninstall “Suspicious Surfing Behavior”.

    2.Remove “Suspicious Surfing Behavior” from Your Browser

    Remove “Suspicious Surfing Behavior” from Your Browser.

    Remove a toolbar from Mozilla FirefoxRemove a toolbar from Google Chrome Remove a toolbar from Internet Explorer Remove a toolbar from Safari
    Start Mozilla Firefox Open the menu window


    Select the “Add-ons” icon from the menu


    Select “Suspicious Surfing Behavior” and click “Remove


    After “Suspicious Surfing Behavior” is removed, restart Mozilla Firefox by closing it from the red “X” in the top right corner and start it again.

    Start Google Chrome and Open the drop menu


  • Move the cursor over “Tools” and then from the extended menu choose “Extensions
  • uninstall-fig8

  • From the opened “Extensions” menu locate “Suspicious Surfing Behavior” and click on the garbage bin icon on the right of it.
  • uninstall-fig9

  • After “Suspicious Surfing Behavior” is removed, restart Google Chrome by closing it from the red “X” in the top right corner and start it again.
  • Start Internet Explorer:

  • Click “‘Tools’ to open the drop menu and select ‘Manage Add-ons’
  • uninstall-fig10

  • In the ‘Manage Add-ons’ window, make sure that in the first window ‘Add-on Types’, the drop menu ‘Show’ is on ‘All add-ons’
  • uninstall-fig11

    Select “Suspicious Surfing Behavior” to remove, and then click ‘Disable’. A pop-up window will appear to inform you that you are about to disable the selected toolbar, and some additional toolbars might be disabled as well. Leave all the boxes checked, and click ‘Disable’.


    After “Suspicious Surfing Behavior” has been removed, restart Internet Explorer by closing it from the red ‘X’ in the top right corner and start it again.

    Start Safari

    Open the drop menu by clicking on the sprocket icon in the top right corner.

    From the drop menu select ‘Preferences’
    In the new window select ‘Extensions’
    Click once on “Suspicious Surfing Behavior”
    Click ‘Uninstall’


    A pop-up window will appear asking for confirmation to uninstall “Suspicious Surfing Behavior”. Select ‘Uninstall’ again, and the “Suspicious Surfing Behavior” will be removed.

    Remove “Suspicious Surfing Behavior” automatically by downloading an advanced anti-malware program.

    1. Remove “Suspicious Surfing Behavior” with SpyHunter Anti-Malware Tool

    Remove “Suspicious Surfing Behavior” with SpyHunter Anti-Malware Tool

    1. Install SpyHunter to scan for and remove “Suspicious Surfing Behavior”.2. Scan with SpyHunter to Detect and Remove “Suspicious Surfing Behavior”.
    Step 1: Click here to go to SpyHunter’s download instruction page.
    Step 2: Guide yourself by the download instructions provided for each browser.
    Step 3: After you have installed SpyHunter, wait for it to automatically update.


    Step1: After the update process has finished, click on the ‘Scan Computer Now’ button.
    Step2: After SpyHunter has finished scanning your PC for any “Suspicious Surfing Behavior” files, click on the ‘Fix Threats’ button to remove them automatically and permanently.
    Step3: Once the intrusions on your PC have been removed, it is highly recommended to restart it.

    2. Back up your data to secure it against attacks related to “Suspicious Surfing Behavior” in the future

    Back up your data to secure it against attacks in the future

    IMPORTANT! Before reading the Windows backup instructions, we highly recommend to back up your data automatically with cloud backup and insure it against any type of data loss on your device, even the most severe. We recommend reading more about and downloading SOS Online Backup .

    1. For Windows 7 and earlier 1. For Windows 8, 8.1 and 10 1. Enabling the Windows Defense Feature (Previous Versions)

    1-Click on Windows Start Menu
    2-Type Backup And Restore
    3-Open it and click on Set Up Backup
    4-A window will appear asking you where to set up backup. You should have a flash drive or an external hard drive. Mark it by clicking on it with your mouse then click on Next.
    5-On the next window, the system will ask you what do you want to backup. Choose the ‘Let Me Choose’ option and then click on Next.
    6-Click on ‘Save settings and run backup’ on the next window in order to protect your files from possible attacks by “Suspicious Surfing Behavior”.

    1-Press Windows button + R
    2-In the window type ‘filehistory’ and press Enter
    3-A File History window will appear. Click on ‘Configure file history settings’
    4-The configuration menu for File History will appear. Click on ‘Turn On’. After its on, click on Select Drive in order to select the backup drive. It is recommended to choose an external HDD, SSD or a USB stick whose memory capacity is corresponding to the size of the files you want to backup.
    5-Select the drive then click on ‘Ok’ in order to set up file backup and protect yourself from “Suspicious Surfing Behavior”.

    1- Press Windows button + R keys.
    2- A run windows should appear. In it type ‘sysdm.cpl’ and then click on Run.
    3- A System Properties windows should appear. In it choose System Protection.
    5- Click on Turn on system protection and select the size on the hard disk you want to utilize for system protection.
    6- Click on Ok and you should see an indication in Protection settings that the protection from “Suspicious Surfing Behavior” is on.
    Restoring a file via Windows Defense feature:
    1-Right-click on the encrypted file, then choose Properties.
    2-Click on the Previous Versions tab and then mark the last version of the file.
    3-Click on Apply and Ok and the file encrypted by “Suspicious Surfing Behavior” should be restored.

    Optional: Using Alternative Anti-Malware Tools

    Remove “Suspicious Surfing Behavior” Using Other Alternative Tools

    STOPZilla Anti Malware
    1. Download and Install STOPZilla Anti-malware to Scan for And Remove “Suspicious Surfing Behavior”.
    Step 1: Download STOPZilla by clicking here.
    Step 2: A pop-up window will appear. Click on the ‘Save File’ button. If it does not, click on the Download button and save it afterwards.
    Step 3: After you have downloaded the setup, simply open it.
    Step 4: The installer should appear. Click on the ‘Next’ button.
    Step 5: Check the ‘I accept the agreement’ check circle if not checked if you accept it and click the ‘Next’ button once again.
    Step 6: Review and click on the ‘Install’ button.
    Step 7: After the installation process has completed click on the ‘Finish’ button.

    2. Scan your PC with STOPZilla Anti Malware to remove all “Suspicious Surfing Behavior” associated files completely.
    Step 1: Launch STOPZilla if you haven’t launched it after install.
    Step 2: Wait for the software to automatically scan and then click on the ‘Repair Now’ button. If it does not scan automatically, click on the ‘Scan Now’ button.
    Step 3: After the removal of all threats and associated objects, you should Restart your PC.

    Ventsislav Krastev

    Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

    More Posts - Website

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    with Anti-Malware
    “Suspicious Surfing Behavior” may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
    SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy

    Preparation before removing “Suspicious Surfing Behavior”.

    Before starting the actual removal process, we recommend that you do the following preparation steps.

    • Make sure you have these instructions always open and in front of your eyes.
    • Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
    • Be patient as this could take a while.

    Step 1: Boot Your PC In Safe Mode to isolate and remove “Suspicious Surfing Behavior”


    Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
    We Recommend To Scan Your PC with SpyHunter

    Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

    1. Hold Windows key () + R
    Remove Virus Trojan Step 1

    2. The "Run" Window will appear. In it, type "msconfig" and click OK.
    Remove Virus Trojan Step 2

    3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
    Remove Virus Trojan Step 3
    Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

    4. When prompted, click on "Restart" to go into Safe Mode.
    Remove Virus Trojan Step 4

    5. You can recognize Safe Mode by the words written on the corners of your screen.
    Remove Virus Trojan Step 5

    Step 2: Clean any registries, created by “Suspicious Surfing Behavior” on your computer.

    The usually targeted registries of Windows machines are the following:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

    You can access them by opening the Windows registry editor and deleting any values, created by “Suspicious Surfing Behavior” there. This can happen by following the steps underneath:

    1. Open the Run Window again, type "regedit" and click OK.
    Remove Virus Trojan Step 6

    2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.
    Remove Virus Trojan Step 7

    3. You can remove the value of the virus by right-clicking on it and removing it.
    Remove Virus Trojan Step 8 Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

    Step 3: Find virus files created by “Suspicious Surfing Behavior” on your PC.

    For Windows 8, 8.1 and 10. For Windows XP, Vista, and 7.

    For Newer Windows Operating Systems

    1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.

    <Remove Virus Trojan Step 9

    2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.

    Remove Virus Trojan Step 10

    3: Navigate to the search box in the top-right of your PC's screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be "fileextension:exe". After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:

    file extension malicious

    N.B. We recommend to wait for the green loading bar in the navination box to fill up in case the PC is looking for the file and hasn't found it yet.

    For Older Windows Operating Systems

    In older Windows OS's the conventional approach should be the effective one:

    1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.

    Remove Virus Trojan Step 10

    2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.

    Remove Virus Trojan Step 11

    3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.

    Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.

    Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
    This will enable you to install and use SpyHunter 5 successfully.

    Step 4: Scan for “Suspicious Surfing Behavior” with SpyHunter Anti-Malware Tool

    1. Click on the "Download" button to proceed to SpyHunter's download page.

    It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

    2. After you have installed SpyHunter, wait for it to update automatically.

    SpyHunter 5 Scan Step 1

    3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

    SpyHunter 5 Scan Step 2

    4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

    SpyHunter 5 Scan Step 3

    If any threats have been removed, it is highly recommended to restart your PC.

    “Suspicious Surfing Behavior” FAQ

    What Does “Suspicious Surfing Behavior” Trojan Do?

    The “Suspicious Surfing Behavior” Trojan is a malicious computer program designed to disrupt, damage, or gain unauthorized access to a computer system. It can be used to steal sensitive data, gain control over a system, or launch other malicious activities.

    What Damage Can “Suspicious Surfing Behavior” Trojan Cause?

    The “Suspicious Surfing Behavior” Trojan is a malicious type of malware that can cause significant damage to computers, networks and data. It can be used to steal information, take control of systems, and spread other malicious viruses and malware.

    Is “Suspicious Surfing Behavior” Trojan a Harmful Virus?

    Yes, it is. A Trojan is a type of malicious software that is used to gain unauthorized access to a person's device or system. It can damage files, delete data, and even steal confidential information.

    Can Trojans, Like “Suspicious Surfing Behavior” Steal Passwords?

    Yes, Trojans, like “Suspicious Surfing Behavior”, can steal passwords. These malicious programs are designed to gain access to a user's computer, spy on victims and steal sensitive information such as banking details and passwords.

    Can “Suspicious Surfing Behavior” Trojan Hide Itself?

    Yes, it can. A Trojan can use various techniques to mask itself, including rootkits, encryption, and obfuscation, to hide from security scanners and evade detection.R

    Can a Trojan Virus be Removed by Factory Reset?

    Yes, a Trojan Virus can be removed by factory resetting your device. This is because it will restore the device to its original state, eliminating any malicious software that may have been installed.

    Can “Suspicious Surfing Behavior” Trojan Infect WiFi?

    Yes, it is possible for a Trojan to infect WiFi networks. When a user connects to the infected network, the Trojan can spread to other connected devices and can access sensitive information on the network.

    Can Trojans Be Deleted?

    Yes, Trojans can be deleted. This is typically done by running a powerful anti-virus or anti-malware program that is designed to detect and remove malicious files. In some cases, manual deletion of the Trojan may also be necessary.

    Are Trojans Hard to Remove?

    Yes, Trojans can be very hard to remove as they often disguise themselves as legitimate programs, making them difficult to detect and extremely tricky to remove.

    Can Trojans Steal Files?

    Yes, Trojans can steal files if they are installed on a computer. This is done by allowing the malware author or user to gain access to the computer and then steal the files stored on it.

    Which Anti-Malware Can Remove Trojans?

    Anti-malware programs such as SpyHunter are capable of scanning for and removing Trojans from your computer. It is important to keep your anti-malware up to date and regularly scan your system for any malicious software.

    Can Trojans Infect USB?

    Yes, Trojans can infect USB devices. USB Trojans typically spread through malicious files downloaded from the internet or shared via email, allowing the hacker to gain access to a user's confidential data.

    About the “Suspicious Surfing Behavior” Research

    The content we publish on SensorsTechForum.com, this “Suspicious Surfing Behavior” how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific trojan problem.

    How did we conduct the research on “Suspicious Surfing Behavior”?

    Please note that our research is based on an independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware definitions, including the various types of trojans (backdoor, downloader, infostealer, ransom, etc.)

    Furthermore, the research behind the “Suspicious Surfing Behavior” threat is backed with VirusTotal.

    To better understand the threat posed by trojans, please refer to the following articles which provide knowledgeable details.


    1. Trojan Horse – What Is It?
    2. Trojanized AnyDesk App Delivered through Fake Google Ads
    3. Hackers Continue to Use Malicious Excel 4.0 Macros to Deliver Banking Trojans
    4. Ficker Infostealer Uses Fake Spotify Ads to Propagate
    5. Jupyter Infostealer Malware Targets Chrome and Firefox Browser Data

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