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How to eliminate the one dark browser hijacker

Also Known As: yesjis.com redirect
Damage level: Medium

What kind of application is one dark?

We have discovered the one dark application while inspecting browser notifications delivered by various questionable websites. Once we installed one dark, it hijacked a web browser by changing its settings. We have learned that one dark is a browser hijacker designed to promote yesjis.com - a fake search engine.

yesjis.com browser hijacker

one dark browser hijacker in detail

Our team has noticed that one dark browser hijacker sets yesjis.com as the default search engine, homepage, and new tab page. At the time of the research, yesjis.com showed us search results generated by websearches.club - another shady search engine. We did a repetitive analysis and observed that one dark does not always change settings. In that case, it opens yesjis.com only when a search query is entered into the URL bar.

Typically, fake search engines show results generated by other (legitimate or untrustworthy) engines or generate misleading results. A big part of browser hijackers keeps their settings unchangeable while they are present. Thus, users cannot stop browser hijackers from opening specific addresses without removing them.

Threat Summary:
Name one dark
Threat Type Browser Hijacker, Redirect, Search Hijacker, Toolbar, Unwanted New Tab
Browser Extension(s) one dark
Supposed Functionality Dark mode for web browsers
Promoted URL yesjis.com
Detection Names (yesjis.com) N/A (VirusTotal)
Affected Browser Settings Homepage, new tab URL, default search engine
Symptoms Manipulated Internet browser settings (homepage, default Internet search engine, new tab settings). Users are forced to visit the hijacker's website and search the Internet using their search engines.
Distribution methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers.
Damage Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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Browser hijackers in general

Usually, browser-hijacking applications are promoted as useful apps (one dark is promoted as an extension that provides dark mode for web browsers). Apps of this type (and fake search engines) can be used to collect information about their users. More examples of browser hijackers are Duty-Search, PremiumSearch, Easy-Search.

How did one dark install on my computer?

The installer for one dark browser hijacker is promoted on a deceptive website offering to update the installed extension. That website is promoted through notifications delivered by questionable websites. Also, this app could be distributed through downloaders and installers for other programs.

When programs are bundled with browser hijackers, their downloaders and (or) installers have settings that can be used to deselect optional downloads and (or) installations. Browsers get hijacked when users download and (or) install programs without changing "Custom", "Advanced", or similar settings.

How to avoid installation of potentially unwanted applications?

Do not trust shady websites offering to download files/programs. Always use official websites and direct links as sources for downloading them. Check downloaders and installers for optional downloads or installations and deselect them before downloading or installing software.

Also, do not trust advertisements appearing on shady websites - clicking on them can result in opening malicious pages or downloading/installing unwanted apps. If your computer is already infected with one dark, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this browser hijacker.

Yesjis.com redirects to websearches.club (GIF):

one dark browser hijacker yesjis.com redirects to websearches.club

Deceptive pages promoting one dark browser hijacker:

one dark browser hijacker deceptive page promoting browser hijacker one dark browser hijacker deceptive website used for promotion

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Quick menu:

one dark browser hijacker removal:

Windows 11 users:

Accessing Apps and Features in Windows 11

Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.

Windows 10 users:

Accessing Programs and Features (uninstall) in Windows 8

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:

Accessing Programs and Features (uninstall) in Windows 7

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:

Uninstall app in OSX (Mac)

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.

yesjis.com browser hijacker uninstall via Control Panel

In the uninstall programs window: look for any recently installed suspicious applications (for example, "one dark"), select these entries and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted applications (which cause browser redirects to the yesjis.com website), scan your computer for any remaining unwanted components. To scan your computer, use recommended malware removal software.

one dark browser hijacker removal from Internet browsers:

Video showing how to remove one dark browser hijacker using Combo Cleaner:

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing yesjis.com related Google Chrome extensions

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate "one dark" and other recently-installed suspicious browser add-ons, and remove them.

Change your homepage:

Removing yesjis.com from Google Chrome homepage

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "Settings". In the "On startup" section, disable "one dark", look for a browser hijacker URL (hxxp://www.yesjis.com) below the “Open a specific or set of pages” option. If present click on the three vertical dots icon and select “Remove”.

Change your default search engine:

Removing yesjis.com from Google Chrome default search engine

To change your default search engine in Google Chrome: Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "Settings", in the "Search engine" section, click "Manage search engines...", in the opened list look for "yesjis.com", when located click the three vertical dots near this URL and select "Remove from list".

Optional method:

If you continue to have problems with removal of the yesjis.com redirect, reset your Google Chrome browser settings. Click the Chrome menu icon Google 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.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plugins from Mozilla Firefox:

Removing yesjis.com related Mozilla Firefox extensions

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click on "Extensions" and remove "one dark", as well as all other recently installed browser plug-ins.

Change your homepage:

Removing yesjis.com from Mozilla Firefox homepage

To reset your homepage, click the Firefox menu firefox menu icon (at the top right corner of the main window), then select "Options", in the opened window disable "one dark", remove hxxp://yesjis.com and enter your preferred domain, which will open each time you start Mozilla Firefox.

Change your default search engine:

Removing yesjis.com from Mozilla Firefox default search engine

In the URL address bar, type about:config and press Enter.
Click "I'll be careful, I promise!".
In the search filter at the top, type: "extensionControlled"
Set both results to "false" by either double-clicking each entry or clicking the Mozilla Firefox switch about:config entry button button.

Optional method:

Computer users who have problems with yesjis.com redirect removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

Removing browser hijackers from safari step 1 - accessing preferences

Make sure your Safari browser is active and click Safari menu, then select Preferences...

removing browser hijacker from safari step 2 - removing extensions

In the preferences window select the Extensions tab. Look for any recently installed suspicious extensions and uninstall them.

Removing browser hijackers from safari step 3 - changing homepage

In the preferences window select General tab and make sure that your homepage is set to a preferred URL, if its altered by a browser hijacker - change it.

removing browser hijackers from safari step 4 - changing the default Internet search engine

In the preferences window select Search tab and make sure that your preferred Internet search engine is selected.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing browser hijackers from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Extensions". Locate any recently-installed suspicious browser add-ons, and remove them.

Change your homepage and new tab settings:

Removing browser hijackers from Microsoft Edge step 2

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Settings". In the "On startup" section look for the name of the browser hijacker and click "Disable".

Change your default Internet search engine:

Removing browser hijackers from Microsoft Edge step 3

To change your default search engine in Microsoft Edge: Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Privacy and services", scroll to bottom of the page and select "Address bar". In the "Search engines used in address bar" section look for the name of the unwanted Internet search engine, when located click the "Disable" button near it. Alternatively you can click on "Manage search engines", in the opened menu look for unwanted Internet search engine. Click on the puzzle icon Microsoft Edge (Chromium) puzzle icon near it and select "Disable".

Optional method:

If you continue to have problems with removal of the yesjis.com redirect, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

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.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Summary:

declining installation of browser hijackers while downloading free software sampleA browser hijacker is a type of adware infection that modifies Internet browser settings by assigning the homepage and default Internet search engine settings to some other (unwanted) website URL. Commonly, this type of adware infiltrates operating systems through free software downloads. If your download is managed by a download client, ensure that you decline offers to install advertised toolbars or applications that seek to change your homepage and default Internet search engine settings.

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Frequently Asked Questions (FAQ)

What is the purpose of forcing users visit yesjis.com website?

The page is promoted because the higher the number of users who visit the page is, the more revenue page creators generate.

Is visiting yesjis.com a threat to my privacy?

Both fake search engines and browser hijackers can be designed to collect information about their users. Therefore, having browsers hijacked by apps of this type can cause browsing safety/online privacy problems.

How did a browser hijacker infiltrate my computer?

Most browser hijackers are promoted/distributed using social engineering tactics, such as browser notifications, intrusive advertisements. Also, they are distributed by bundling them with other programs.

Will Combo Cleaner help me remove one dark browser hijacker?

Yes, Combo Cleaner will scan the operating system and get rid of all existing browser-hijacking apps. It is worth mentioning that browser hijackers can reinstall one another. It makes it difficult for users who have their browsers hijacked by multiple browser hijackers to remove all of them at once. Thus, it is recommended to remove browser hijackers automatically (with specialized software like Combo Cleaner).

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Software uninstall instructions
Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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