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Removing the notifications/ads displayed by the defendersystem.xyz website

Also Known As: Ads by defendersystem.xyz
Damage level: Medium

What kind of page is defendersystem[.]xyz?

Defendersystem[.]xyz is rogue page that our researchers discovered while inspecting suspicious websites. This webpage promotes scams, pushes spam browser notifications, and redirects visitors to other (likely untrustworthy/dangerous) sites. Most users enter such webpages via redirects caused by sites using rogue advertising networks.

defendersystem[.]xyz pop-up redirects

Defendersystem[.]xyz overview

The content encountered on and via rogue pages might vary depending on the visitor's IP address (geolocation). When we accessed defendersystem[.]xyz, it presented us with a scam similar to "Norton Security Update Is Available Now", "McAfee Total Protection has expired", "Your Antivirus Has Expired", "Norton subscription has expired today", and thousands of others.

The deceptive content will be displayed regardless of whether the user has the Norton anti-virus installed or its expiration status. It must be stressed that this scheme is in no way associated with the actual Norton AntiVirus. This scam model (expired/outdated software alert) is usually used to proliferate untrustworthy, fraudulent, and malicious applications.

What is more, defendersystem[.]xyz requests visitors to allow it to deliver browser notifications (ads). If enabled, this site will spam users with advertisements promoting online scams, untrustworthy/harmful software, and even malware.

To summarize, through webpages like defendersystem[.]xyz - users can experience system infections, severe privacy issues, financial losses, and identity theft.

Threat Summary:
Name Ads by defendersystem.xyz
Threat Type Push notifications ads, Unwanted ads, Pop-up ads
Detection Names Forcepoint ThreatSeeker (Suspicious), Full List Of Detections (VirusTotal)
Serving IP Address 104.21.73.183
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, false claims within visited websites, 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.
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To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Browser notification spam in general

We have inspected thousands of rogue websites; datadesktopsecurity[.]online, protectwatcher[.]xyz, and wilycaptcha[.]live are merely a couple of examples.

These pages display browser notifications endorsing online scams and malicious content. Note that any legitimate products encountered through these adverts are unlikely to be promoted by their actual developers. Scammers often abuse affiliate programs of genuine content in order to obtain illegitimate commissions.

How did defendersystem[.]xyz gain permission to deliver spam notifications?

Websites need user consent to deliver browser notifications. Therefore, if you are receiving these ads from defendersystem[.]xyz - it means that you've likely visited this page and pressed "Allow", "Allow Notifications", or a similar option presented on it.

How to prevent deceptive sites from delivering spam notifications?

If you access a suspicious website - do not enable it to deliver browser notifications (i.e., do not click "Allow", "Allow Notifications", etc.). Instead, ignore or deny notification delivery (i.e., press "Block", "Block Notifications", etc.).

Should you experience continuous unprompted redirects to questionable sites, it could be caused by the presence of adware on the device. 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 the defendersystem[.]xyz website (GIF):

defendersystem[.]xyz website appearance (GIF)

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:
▼ DOWNLOAD Combo Cleaner By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Quick menu:

Disable unwanted browser notifications:

Video showing how to disable web browser notifications:

Google Chrome logoRemove spam notifications from Google Chrome:

Click the Menu button (three dots) on the right upper corner of the screen and select "Settings". In the opened window select "Privacy and security", then click on "Site Settings" and choose "Notifications".

Disable web browser notifications in Google Chrome (step 1)

In the "Allowed to send notifications" list search for websites that you want to stop receiving notifications from. Click on the three dots icon near the website URL and click "Block" or "Remove" (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again).

Disable web browser notifications in Google Chrome (step 2)

Android logoRemove spam notifications from Google Chrome (Android):

Tap the Menu button (three dots) on the right upper corner of the screen and select "Settings". Scroll down, tap on "Site settings" and then "Notifications".

Disable web browser notifications in Google Chrome - Android (step 1)

In the opened window, locate all suspicious URLs and tap on them one-by-one. Once the pop-up shows up, select either "Block" or "Remove" (if you tap "Remove" and visit the malicious site once more, it will ask to enable notifications again).

Disable web browser notifications in Google Chrome - Android (step 2)

Mozilla Firefox logoRemove spam notifications from Mozilla Firefox:

Click the Menu button (three bars) on the right upper corner of the screen. Select "Settings" 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".

Disable web browser notifications in Mozilla Firefox (step 1)

In the opened window, locate all suspicious URLs and block them using the drop-down menu or either remove them by clicking "Remove Website" at the bottom of the window (if you click "Remove Website" and visit the malicious site once more, it will ask to enable notifications again).

Disable web browser notifications in Mozilla Firefox (step 2)

Microsoft Edge logoRemove spam notifications from Microsoft Edge:

Click the menu button (three dots) on the right upper corner of the Edge window and select "Settings". Click on "Cookies and site permissions" in the toolbar on the left hand side of the screen and select "Notifications".

Disable web browser notifications in Microsoft Edge (step 1)

Click three dots on the right hand side of each suspicious URL under "Allow" section and click "Block" or "Remove" (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again).

Disable web browser notifications in Microsoft Edge (step 2)

Safari logoRemove spam notifications from Safari (macOS):

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.

Disable web browser notifications in Safari - macOS (step 1)

Check for suspicious URLs and apply the "Deny" option using the drop-down menu or either remove them by clicking "Remove" at the bottom of the window (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again)

Disable web browser notifications in Safari - macOS (step 2)

How to avoid browser notification spam?

Internet users should be very skeptical when being asked to allow notifications. While this is a useful feature that allows you to receive timely news from websites you like, deceptive marketers frequently abuse it.

Only allow notifications from websites that you fully trust. For added security - use an anti-malware application with a real-time web browsing monitor to block shady websites that tries to trick you into allowing spam notifications. We recommend using Combo Cleaner Antivirus for Windows.

Frequently Asked Questions (FAQ)

Why am I seeing ads (browser notifications) delivered by defendersystem[.]xyz in the right lower corner of my desktop?

Sites cannot deliver browser notifications without user permission. Therefore, you have likely entered defendersystem[.]xyz and pressed "Allow", "Allow Notifications", or a similar option - thus enabling the advertisement delivery.

I have clicked on notification ads, is my computer infected?

No, clicking on a browser notification will not initiate any system infection chains. However, the websites and apps pushed through these ads can be malicious and cause severe issues (including system infections).

Is defendersystem[.]xyz a virus?

No, websites like defendersystem[.]xyz are not classified as viruses, but they can promote virulent content. Sites of this kind endorse online scams, unreliable/harmful software, and even malware.

Will Combo Cleaner remove defendersystem[.]xyz ads automatically or manual steps are still required?

Yes, Combo Cleaner can scan computers and undo the permissions given to this webpage. Additionally, Combo Cleaner can block all further access to this and other rogue, scam, and malicious sites. Therefore, no extra steps will be unnecessary.

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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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