What is captcha-sourcecenter[.]com?
Captcha-sourcecenter[.]com is an untrustworthy website that can load dubious content or open other pages of this kind (it depends on its visitor's geolocation). In one way or another, it is strongly advisable not to visit websites like captcha-sourcecenter[.]com. Although, most users end up on them unwillingly.
For example, by clicking on deceptive advertisements or while visiting other shady pages. Also, it is common that browsers to open sites like captcha-sourcecenter[.]com because they have some potentially unwanted application (PUA) installed on them.
Captcha-sourcecenter [.]com is likely to be used to promote download websites for browser hijackers, adware-type applications, and other potentially unwanted apps, other untrustworthy websites (e.g., lottery scams, technical support scams).
It is known that captcha-sourcecenter[.]com can load dubious content as well. At the time of the research, this page showed a deceptive message encouraging to click the "Allow" button to determine whether or not the visitor is human (to prove that a visitor is not a robot).
It is one of the popular clickbait techniques to trick a visitor into allowing a page like captcha-sourcecenter[.]com to show its notifications. If allowed, sites like captcha-sourcecenter[.]com begin to show notifications with deceptive advertisements, links to unreliable sites in them, or other dubious notifications.
Therefore, it is strongly recommended not to allow captcha-sourcecenter[.]com or any other similar (or different) unreliable page to show notifications.
It is noteworthy that sites like captcha-sourcecenter[.]com often are promoted via PUAs, and these apps can be designed to generate ads. For instance, coupons, banners, surveys, pop-up ads. Those can be designed to execute scripts and cause unwanted downloads, installations, or open shady websites.
Also, it is common for PUAs to functions as data collectors targeting browsing data. For example, IP addresses, geolocations, addresses of visited websites, entered search queries.
Sometimes apps of this kind can access sensitive details as well. Data collected by PUAs can be misused for marketing purposes, sold to third parties, or monetized in other ways.
|Name||Ads by captcha-sourcecenter.com|
|Threat Type||Push notifications ads, Unwanted ads, Pop-up ads|
|Detection Names||Fortinet (Spam), Spamhaus (Spam), Full List Of Detections (VirusTotal)|
|Serving IP Address||220.127.116.11|
|Observed Domains||a.captcha-sourcecenter[.]com, b.captcha-sourcecenter[.]com, c.captcha-sourcecenter[.]com, d.captcha-sourcecenter[.]com, e.captcha-sourcecenter[.]com, f.captcha-sourcecenter[.]com|
|Symptoms||Seeing advertisements not originating from the sites you are browsing. Intrusive pop-up ads. Decreased Internet browsing speed.|
|Distribution Methods||Deceptive pop-up ads, potentially unwanted applications (adware)|
|Damage||Decreased computer performance, browser tracking - privacy issues, possible additional malware infections.|
|Malware Removal (Windows)||
To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
To sum up, potentially unwanted applications and addresses that they open/promote (including pages like captcha-sourcecenter[.]com) cannot be trusted.
A typical PUA is designed only to generate revenue for its developer and is useless to its users (even when a PUA is advertised as a legitimate, useful application). If an app of this type is already installed on a browser (or computer), then it should be removed as soon as possible.
How did adware install on my computer?
It is common that developers distribute their potentially unwanted applications by including them in downloaders, installers of other programs as extra offers. This distribution method is known as "bundling".
Typically, bundled applications can be found in settings like "Advanced", "Custom", or near certain checkboxes that those downloaders, installers have.
Bundled applications get permission to be downloaded or installed together with other programs when users download or install those programs without declining unwanted offers (changing the aforementioned settings).
In some cases, unwanted downloads, installations can be caused by clicking deceptive advertisements. Although, only when those ads are designed to execute certain scripts.
How to avoid installation of potentially unwanted applications?
Third-party downloaders, unofficial websites, Peer-to-Peer networks like torrent clients, eMule, etc., should not be used to download software or third-party installers to install it. Users should download programs (and files) from legitimate, official websites and through direct links.
Downloads and installations should not be finished without checking setups for "Advanced", "Custom" (or other settings), or included checkboxes and declining offers to download or install potentially unwanted apps. Advertisements on various questionable, untrustworthy websites should not be trusted as well.
If clicked, those ads can open unreliable sites or even cause unwanted downloads, installations. Any unwanted, suspicious extensions, add-ons, plug-ins that are installed on a browser should be removed. Any software of this kind that is installed on a computer should be uninstalled too.
If your computer is already infected with rogue applications, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate them.
Appearance of captcha-sourcecenter[.]com website (GIF):
IMPORTANT NOTE! This deceptive site asks to enable web browser notifications.
Therefore, before commencing, perform these steps:
Google Chrome (PC):
- Click the Menu button (three dots) on the right upper corner of the screen
- Select "Settings", scroll down to the bottom and click "Advanced"
- Scroll down to the "Privacy and security" section, select "Content settings" and then "Notifications"
- Click three dots on the right hand side of each suspicious URL and click "Block" or "Remove" (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again)
Google Chrome (Android):
- Click on the Menu button (three dots) on the right upper corner of the screen and click "Settings"
- Scroll down, click on "Site settings" and then "Notifications"
- In the opened window, locate all suspicious URLs and click on them one-by-one
- Select "Notifications" in the "Permissions" section and set the toggle button to "OFF"
- Click the Menu button (three bars) on the right upper corner of the screen
- Select "Options" and click on "Privacy & Security" in the toolbar on the left hand side of the screen
- Scroll down to the "Permissions" section and click the "Settings" button next to "Notifications"
- In the opened window, locate all suspicious URLs, click the drop-down menu and select "Block"
- Click the Gear button on the right upper corner of the IE window
- Select "Internet options"
- Select the "Privacy" tab and click "Settings" under "Pop-up Blocker" section
- Select suspicious URLs under and remove them one by one by clicking the "Remove" button
- Click the menu button (three dots) on the right upper corner of the Edge window
- Scroll down, find and click "Settings"
- Scroll down again and click "View advanced settings"
- Click "Manage" under "Website permissions"
- Click the switch under each suspicious website
- Click "Safari" button on the left upper corner of the screen and select "Preferences..."
- Select the "Websites" tab and then select "Notifications" section on the left pane
- Check for suspicious URLs and apply the "Deny" option for each
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
- What is captcha-sourcecenter[.]com?
- STEP 1. Uninstall adware applications using Control Panel.
- STEP 2. Remove rogue plug-ins from Google Chrome.
- STEP 3. Remove adware-type extensions from Mozilla Firefox.
- STEP 4. Remove malicious extensions from Safari.
- STEP 5. Remove rogue plug-ins from Microsoft Edge.
- STEP 6. Remove adware from Internet Explorer.
Windows 10 users:
Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.
Windows 7 users:
Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.
macOS (OSX) users:
Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.
In the uninstall programs window, look for any potentially unwanted applications, select these entries and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted application that causes captcha-sourcecenter[.]com redirects, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.
Remove adware from Internet browsers:
Video showing how to remove potentially unwanted browser add-ons:
Remove malicious extensions from Google Chrome:
Click the Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons and remove them.
If you continue to have problems with removal of the ads by captcha-sourcecenter.com, reset your Google Chrome browser settings. Click the Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.
After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.
In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.
Remove malicious plug-ins from Mozilla Firefox:
Click the Firefox menu (at the top right corner of the main window), select "Add-ons". Click "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.
Computer users who have problems with ads by captcha-sourcecenter.com removal can reset their Mozilla Firefox settings.
Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.
Select Troubleshooting Information.
In the opened window, click the Refresh Firefox button.
In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.
Remove malicious extensions from Safari:
Make sure your Safari browser is active, click Safari menu, and select Preferences....
In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.
Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...
In the opened window select all history and click the Clear History button.
Remove malicious extensions from Microsoft Edge:
Click the Edge menu icon (at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.
If you continue to have problems with removal of the ads by captcha-sourcecenter.com, reset your Microsoft Edge browser settings. Click the Edge menu icon (at the top right corner of Microsoft Edge) and select Settings.
In the opened settings menu select Reset settings.
Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.
- If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.
Remove malicious add-ons from Internet Explorer:
Click the "gear" icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".
If you continue to have problems with removal of the ads by captcha-sourcecenter.com, reset your Internet Explorer settings to default.
Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.
Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.
Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.
In the opened window, select the Advanced tab.
Click the Reset button.
Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.
Commonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.
If you are experiencing problems while trying to remove ads by captcha-sourcecenter.com from your computer, please ask for assistance in our malware support forum.
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