Tapsnake CronDNS, Dubfishicv virus: what it is and how to remove it
Tapsnake is a fake alert that users might encounter while browsing the internet on Google Chrome, Mozilla Firefox, Safari, or another browser. This social engineering attacks typically starts with adware infection - these ad-supported applications enter computers without permission and modify web browser settings in order to link users to predetermined websites.
Facts checked October 6, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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Tapsnake CronDNS, Dubfishicv virus: summary
| Detection names | No Microsoft detection name is known |
|---|---|
| Distribution | Not recorded in the old report |
| Damage | Not recorded in the old report |
| Name | Tapsnake CronDNS, Dubfishicv virus |
| Type | Adware extension |
| Symptoms | Redirects to an unknown domain |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 6 more facts
| Evidence | 5 write-ups by security sites; details still limited |
|---|---|
| Domains | virusler.info |
| Ads shown as | Redirects through ad pages |
| Browsers | Chrome, Edge and Firefox |
| First seen | 1 April 2019 |
| Facts checked | 6 October 2026 |
What the Tapsnake CronDNS, Dubfishicv virus ads look like
Your Computer is heavily damaged! (33.2%) Please download PC Keeper™ application to remove (3) Viruses from your Pc. VIRUS INFORMATION
Is Tapsnake CronDNS, Dubfishicv virus dangerous?
From our report of Apr 2019 · not reviewed since
The way adware infects users' computers
It is extremely doubtful if there are people who look for ad-supported software themselves (unless they are tricked into it, like in case of online scams).
Therefore, PUP authors need to find efficient ways to get their programs into users' machines.
One of the most effective adware and PUP distribution methods is software bundling. Freeware developers inject their installers with additional components and hope that users will pick Recommended/Quick mode during the installation.
Users are also prompted to tick the "By downloading this software, you agree to Terms and Conditions." And who reads Terms and Conditions? Not many - although they should.
As soon as users click "Next" several times they already missed the opportunity to decline optional programs. Thus, users should always select Advanced/Custom installation mode and get rid of every additional application.
From our report of Apr 2019 · not reviewed since
More from our earlier report on Tapsnake CronDNS, Dubfishicv virus
- Online scam (redirected by adware)
- Exposure of personal details, malware infections, loss of money
- Excessive ads, redirects; slowdown of the browser, etc.
- * Don't Restart Your Computer ** Mac Detected TAPSNAKE infection, The Infections detected, indicate some recent downloads on the computer which in turn has created problems on the computer.
- Call Mac professionals at +1-800-865-4168 and share this code B2957E to the Technician to Fix This.
- PLEASE DO NOT SHUT DOWN OR RESTART THE COMPUTER, DOING THAT MAY LEAD TO DATA LOSS AND POSSIBLE FAILURE OF THE OPERATING SYSTEM, AND POTENTIAL NON BOOTABLE DATA LOSS.
- CONTACT LIVE CERTIFIED TECHNICIANS TO RESOLVE THE ISSUE CALLING TOLL FREE: +1-800-865-4168
From our report of Apr 2019 · not reviewed since
Tapsnake virus is a bogus message that prompts users to download potentially harmful software
Tapsnake is a fake alert that users might encounter while browsing the internet on Google Chrome, Mozilla Firefox, Safari, or another browser.
This social engineering attacks typically starts with adware infection - these ad-supported applications enter computers without permission and modify web browser settings in order to link users to predetermined websites. Tapsnake is actually a fake virus, and the name of such malware does not exist.
However, those who are less experienced might get convinced that their device is exposed to potential harm and download the promoted software, such as MacKeeper or PC Keeper to allegedly save their systems from virus destruction. Do not believe these claims, as Tapsnake CronDNS, Dubfishicv virus scam is merely a browser infection that can be terminated relatively easily, without downloading the unwanted apps pushed by such fake alerts.
Tapsnake CronDNS, Dubfishicv virus can affect any browser, including Google Chrome, Internet Explorer, Mozilla Firefox or Safari. The fake message can occur at any time, showing the following text:
As you can see, cybercrooks are trying to make users believe that Tapsnake; CronDNS; Dubfishicv names are real and that their PCs are heavily damaged. It is not true, and the message is a scam! Simply close down your browser, and proceed with Tapsnake virus removal.
The primary goal of adware creators is to generate revenue by advertising various products or services of less-known retailers. In such cases, users are exposed to a variety of pop-ups, offers, deals, coupons and other ads. This is done to boost traffic and sales of partners. In return, adware authors receive the monetary benefit.
Sometimes though, ad-supported software might use dirty tricks to make users install bogus software or purchase other products. Tapsnake fake virus is one of the examples of an online scam. There are plenty others created, such as Your Windows Computer Is Infected With (4) Viruses, Your system is heavily damaged by (4) virus! and many others.
The mentioned scams are called tech support scams and urge users to contact cybercrooks via a provided telephone number. In Tapsnake CronDNS, Dubfishicv case, users are prompted to install fake software that might damage their PC. Typically, these programs will flash various messages that the PC needs fixing. For that, users are then asked to buy licensed version of the program.
Tapsnake is a non-existent virus that is not only used in Tapsnake, CronDNS, Dubfishicv scam, but also by Don't Restart Your Computer scam that targets Mac users. The pop-up message states the following:
The Don't Restart Your Computer was also used by Zeus trojan virus scam. As evident, do not trust this technical support scam and do not contact any fake technicians. Instead, remove Tapsnake bogus alert by terminating adware that is redirecting you to suspicious websites.
Regardless of which type of scam you encounter, it is never a good idea to proceed with what is being asked for. Nothing good will come out of it, and you might simply lose your money or even disclose sensitive information, which might later be used for illegal activities.
You should remove Tapsnake virus using a robust security tool, such as . You can also delete the potentially unwanted program manually. Cybersecurity experts from virusler.info.tr warn that even if you ignore fake alerts, the suspicious app will:
Thus, do not hesitate whether or not you should execute Tapsnake CronDNS, Dubfishicv removal.
- Spam your browser with other ads and redirect you to questionable websites;
- Collect non-personally identifiable information about you and share it with third parties;
- Any personal data disclosed might be stolen by cybercrooks;
- Additional add-ons, toolbars, search engines, etc. might be installed without your permission;
- Your browser might become slow and struggle to load pages, etc.
Check your browser and PC
- Address:
virusler.info
How to remove Tapsnake CronDNS, Dubfishicv virus
How to remove the Tapsnake CronDNS, Dubfishicv virus extension
Do the browser steps in every browser and profile on the PC, then check Windows for the program that installed the extension.
Step 1: Remove extensions you did not add
In Chrome open
chrome://extensions, in Edgeedge://extensions, and in Firefox the menu > Extensions and themes.Remove every extension you do not remember adding, especially search, new tab, coupon, PDF, weather or video downloader add-ons. Check every browser and every profile, because each keeps its own list.
If an extension has no Remove button or comes back, a browser policy holds it (see "Managed by your organization" in the procedure below). The pages are the same on Windows 11 and Windows 10.
Chrome on Windows 11: More > Extensions > Manage extensions. Full procedure with screenshots: Remove a browser extension
Step 2: Uninstall programs you did not mean to install
Tapsnake CronDNS, Dubfishicv virus rarely comes alone: it is usually installed by, or together with, a free program. In Windows 11 open Settings > Apps > Installed apps, in Windows 10 Settings > Apps > Apps & features, and sort by install date.
Uninstall every entry from the day the trouble began that you did not install on purpose, for example a download manager, a converter or a browser you never chose.
Keep drivers and entries from Microsoft, Intel, AMD, NVIDIA or your PC's maker unless you are sure.
Full procedure with screenshots: Uninstall a program or app in Windows On uGetFix
Step 3: Reset the browser
A reset removes what the steps above could miss:
- changed start pages
- site permissions
- hidden settings
In Chrome open Settings > Reset settings > Restore settings to their original defaults; in Edge Settings > Reset settings; in Firefox Help > More troubleshooting information > Refresh Firefox.
Tip: Bookmarks and saved passwords stay, while extensions are turned off and the search engine and start page return to the defaults.
Reset every browser on the PC, including Edge, which Windows 11 and Windows 10 always have.
Chrome on Windows 11: Settings > Reset settings. Full procedure with screenshots: Reset a browser and fix a hijacked search engine
Step 4: Scan the PC, then run the offline scan
A scan finds the parts of Tapsnake CronDNS, Dubfishicv virus that the manual steps cannot see. In Windows Security > Virus & threat protection > Scan options, start a Full scan and quarantine what it reports.
Follow it with Microsoft Defender Antivirus (offline scan) > Scan now, which restarts the PC and checks the disk while Windows and the malware are not running.
It takes about 15 minutes and works the same in Windows 11 and Windows 10. If either scan finds something, run the full scan again after removal until it comes back clean.
Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Uninstall from Windows
To terminate Tapsnake virus from Windows OS, follow these steps:
Uninstall from Windows 10/8:
- Type Control Panel into the Windows search box and open the result.
- Under Programs, select Uninstall a program.
Uninstall from Windows 7/XP:
- Click on Windows Start > Control Panel (Windows XP users should click on Add/Remove Programs).
- In Control Panel, select Programs > Uninstall a program.
Remove the unwanted program:
- In the Programs and Features window, look for any recently installed suspicious entries, select them, and click Uninstall.
- If User Account Control appears, click Yes to confirm, then complete the removal.
Remove from Google Chrome
Delete malicious extensions from Google Chrome:
- Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
- In the newly opened window, you will see all the installed extensions. Uninstall all suspicious extensions related to the unwanted program by clicking Remove.
Clear cache and web data from Chrome:
- Click on Menu and pick Settings.
- Under Privacy and security, select Clear browsing data.
- Select Browsing history, Cookies and other site data, as well as Cached images and files.
- Click Clear data.
Change your homepage:
- Click menu and choose Settings.
- Look for a suspicious site in the On startup section.
- Click on Open a specific or set of pages and click on three dots to find the Remove option.
Reset Google Chrome:
If the previous methods did not help you, reset Google Chrome to eliminate all the unwanted components:
- Click on Menu and select Settings.
- In the Settings, scroll down and click Advanced.
- Scroll down and locate Reset and clean up section.
- Now click Restore settings to their original defaults.
- Confirm with Reset settings.
Remove from Microsoft Edge
You need to reset MS Edge as soon as all the PUPs are deleted:
Delete unwanted extensions from MS Edge:
- Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
- From the list, pick the extension and click on the Gear icon.
- Click Remove.
Clear cookies and other browser data:
- Click on the Menu (three horizontal dots at the top-right of the browser window) and select Settings > Privacy, search, and services..
- Under Clear browsing data, pick Choose what to clear.
- Select Cookies and other site data and Cached images and files. (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.
Restore new tab and homepage settings:
- Click the menu icon and choose Settings.
- Then find On startup section.
- Click Remove next to any suspicious startup page.
Reset MS Edge if the above steps did not work:
- Press on Ctrl + Shift + Esc to open Task Manager.
- Click on More details arrow at the bottom of the window.
- Select Details tab.
- Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.
Delete extensions from MS Edge (Chromium):
- Open Edge and click select Settings > Extensions.
- Delete unwanted extensions by clicking Remove.
Clear cache and site data:
- Click on Menu and go to Settings.
- Select Privacy, search and services.
- Under Clear browsing data, pick Choose what to clear.
- Under Time range, pick All time.
- Select Clear now.
Reset Chromium-based MS Edge:
- Click on Menu and select Settings.
- On the left side, pick Reset settings.
- Select Restore settings to their default values.
- Confirm with Reset.
- This will disable extensions and reset startup pages but will not delete bookmarks, saved passwords, or browsing history.
Remove from Mozilla Firefox (FF)
Remove dangerous extensions:
- Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
- Select Add-ons.
- In here, select the unwanted extension and click Remove.
Reset the homepage:
- Click three horizontal lines at the top right corner to open the menu.
- Choose Settings.
- Under Home, set your preferred homepage and new tab settings.
Clear cookies and site data:
- Click Menu and pick Settings.
- Go to Privacy & Security section.
- Scroll down to locate Cookies and Site Data.
- Click on Clear Data...
- Select Cookies and Site Data and Temporary cached files and pages, then click Clear.
Reset Mozilla Firefox
If clearing the browser as explained above did not help, reset Mozilla Firefox:
- Open Mozilla Firefox browser and click the Menu.
- Go to Help and then choose Troubleshooting Information.
- Under Give Firefox a tune up section, click on Refresh Firefox...
- Once the pop-up shows up, confirm the action by pressing on Refresh Firefox.
Delete from Safari
Remove dangerous extensions:
- Open Safari, click Safari in the menu at the top-left of the screen, and select Preferences.
- Go to the Extensions tab, look for any suspicious entries, and click Uninstall to remove them.
Clear history and website data:
- Click Safari in the menu and pick Clear History.
- Set Clear to all history and confirm with Clear History.
Reset Safari:
- Click Safari in the menu and select Preferences > Advanced.
- Enable Show Develop menu in menu bar.
- From the menu bar, click Develop and select Empty Caches.
Delete from macOS
If your macOS is redirecting you to predetermined websites and claims that your device is affected by Tapsnake virus, perform these steps to stop the unwanted activity:
Remove the unwanted application:
- From the menu bar, select Go > Applications.
- In the Applications folder, look for any suspicious entries, then drag them to Trash (or right-click and pick Move to Trash).
Delete leftover files and folders:
- Select Go > Go to Folder.
- Enter /Library/Application Support and remove any suspicious folders related to the unwanted program.
- Repeat the same check in the /Library/LaunchAgents and /Library/LaunchDaemons folders, deleting any suspicious entries.
- Finally, empty the Trash to permanently remove the leftovers.
Reset Internet Explorer
Remove dangerous add-ons:
- Open Internet Explorer, click on the Gear icon (IE menu) on the top-right corner of the browser
- Pick Manage Add-ons.
- You will see a Manage Add-ons window. Here, look for suspicious plugins. Click on these entries and select Disable.
Change your homepage if it was altered:
- Open IE and click on the Gear icon.
- Select Internet Options.
- In the General tab, delete the Home page address and replace it by your preferred one (for example, Google.com).
- Click Apply and then select OK.
Delete temporary files:
- Press on the Gear icon and select Internet Options.
- Under Browsing history, click Delete...
- Select relevant fields and press Delete.
Reset Internet Explorer:
- Click on Gear icon > Internet options and select Advanced tab.
- Select Reset.
- In the new window, check Delete personal settings and select Reset.
Do not let government spy on you
The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices.
Avoid any unwanted government tracking or spying by going totally anonymous on the internet.
You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using VPN.
Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.
Backup files for the later use, in case of the malware attack
Computer users can suffer from data losses due to cyber infections or their own faulty doings.
Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact - you can set this process to be performed automatically.
When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use for the data restoration process.
From our report of Apr 2019 · not reviewed since
Terminate Tapsnake CronDNS, Dubfishicv fake virus by removing adware secretly installed on your computer
Tapsnake CronDNS, Dubfishicv virus removal can be executed either manually or automatically.
Regardless if it sounds serious, adware is typically not that difficult to eliminate - even manually. So pick the best option for you.
First off, you should know that if you want to remove Tapsnake manually you should have some basic computer skills. Also, this procedure might take awhile.
For those who want to get rid of Tapsnake virus quickly, we suggest downloading and installing security software that can take care of everything automatically.
Questions about Tapsnake CronDNS, Dubfishicv virus
How do I stop virusler.info from opening?
Find and remove whatever opens it. Start with the browser's extensions page and remove anything you do not remember adding. Next, open the notification settings and take away permission from sites you do not recognise.
Then check Settings > Apps > Installed apps for programs added around the day the redirects began, and uninstall those. Restart the browser and test a few links after each step.
If virusler.info still appears, reset the browser, which restores the default search engine, start page and permissions without deleting bookmarks or saved passwords. Redirects that survive a reset in every browser point to a program in Windows, and a full scan is the next step.
Is it safe that my browser was redirected to virusler.info?
Landing on virusler.info does not infect the PC by itself. A browser does not run programs from a page without your action. The danger is in the pages that come next:
- some ask you to allow notifications
- some show fake virus warnings
- some offer downloads
- ask for card details
If you only saw those pages and closed them, nothing more is needed than removing whatever caused the redirect. If you allowed notifications, remove that permission.
If you downloaded a file, delete it unopened, or uninstall it if you ran it. If you typed a password or card number on one of the pages, change the password and call your bank.
Why does Tapsnake CronDNS, Dubfishicv virus show me ads?
Because that is its whole purpose. Tapsnake CronDNS, Dubfishicv virus is an adware extension, and its operators are paid for every ad it displays and every click it gets. In this case the ads take the form of redirects through ad pages.
They are chosen by ad networks that accept almost any advertiser, which is why so many look like warnings or prizes. The ads are not a sign that your PC is broken or infected with something worse; they are a sign that something on it, or in the browser, has permission to advertise. Removing that permission or program stops them.
Do I have to clean every browser?
Yes, if you use more than one. We saw Tapsnake CronDNS, Dubfishicv virus in Chrome, Edge and Firefox, and each browser keeps its own extensions, notification permissions and settings. Chrome and Edge share the same extension format, so one installer can add the same adware to both, while Firefox has its own add-ons.
Check every browser on the PC, including ones you rarely open. If you sync a browser with an account, clean it while signed in, so that the removal reaches your other computers rather than the adware returning from them.
How do I know the ads come from Tapsnake CronDNS, Dubfishicv virus?
Look for redirects to virusler.info. That is the trace Tapsnake CronDNS, Dubfishicv virus leaves, and it shows up as redirects through ad pages. Ads that appear on every site, including ones that never carried ads before, point to something on your PC or in the browser rather than to the sites themselves.
A quick test is a private window, where extensions are off by default: if the ads disappear there, an extension is responsible. If they appear even with the browser closed, the source is a notification permission or a program in Windows.
Can adware slow down my PC?
Yes. Adware runs in the background, loads ad scripts, opens extra tabs and contacts its servers, all of which use processor time, memory and bandwidth. Ad-heavy extensions also slow down every page, because they inspect and change it before you see it.
The effect is strongest on older PCs and when several adware programs arrived together. After removal, restart the PC and check Task Manager for anything still using a lot of resources that you do not recognise. Speed usually returns to normal once the ads stop.
I clicked on one of the ads. Am I infected?
Probably not. Clicking an ad usually only opens a page, and a page cannot install programs on an up-to-date Windows PC without your help.
You are at risk only if you then downloaded and ran a file, allowed notifications, entered card or login details, or called a phone number shown on the page. Delete any download and run a full and offline scan.
Change passwords you typed, from a clean device. Call your bank if you gave card details. If you called a number or allowed remote access, see the next question.
Why didn't my antivirus catch Tapsnake CronDNS, Dubfishicv virus?
Many security products do not block adware or notification sites by default, because users often agreed to them, even through a misleading prompt. Notification spam installs nothing at all, so there is no file to detect.
In Windows 11 you can make Microsoft Defender block potentially unwanted apps: open Windows Security > App & browser control > Reputation-based protection settings and turn on Potentially unwanted app blocking. If notifications caused the pop-ups, no scanner will report them; the fix is in the browser's site settings.
An ad showed a phone number and I called it. What now?
The number belongs to scammers, not to Microsoft or an antivirus company. If you only talked, hang up and do not call back. If you let them connect to the PC, disconnect it from the internet, uninstall the remote access program they used, such as AnyDesk, TeamViewer, ScreenConnect or UltraViewer, and run a full and offline scan.
If you paid or gave bank details, call your bank at once on the number printed on your card. Change any passwords you typed while they were connected, and report the call.
Will Fortect remove Tapsnake CronDNS, Dubfishicv virus?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For Tapsnake CronDNS, Dubfishicv virus, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- Trend Micro: Adware (read October 6, 2026)
- Microsoft: Tech support scams (read October 6, 2026)
- Latentview: Non (Personally Identifiable Information) PII Data (read October 6, 2026)
- Google Chrome Help: Use notifications to get alerts (no longer online) (read October 6, 2026)
- FTC: How to recognize, remove and avoid malware (read October 6, 2026)