In the event, you notice the website Mon-thu4 while browsing the web we recommend that you refrain from following its instructions. Mon-thu4 is yet another bogus website that affects popular browsers installed on Mac devices with the goal to push questionable applications. Websites of this type as well as apps promoted on them should never be trusted. Since their sudden appearance in the browser is often related to the presence of any potentially undesired program, security experts encourage affected users to check their operating systems for any present harmful files.
Threat Summary
| Name | Mon-thu4 |
| Type | Pop-up Scam |
| Short Description | Invades browsing sessions to display deceptive offers. Could be misused by hackers for the delivery of malware. |
| Symptoms | Browser slowdowns occur due to increased number of online ads. |
| Distribution Method | Freeware Installations, Bundled Packages |
| Detection Tool |
See If Your System Has Been Affected by malware
Combo Cleaner
Malware Removal Tool
|
User Experience | Join Our Forum to Discuss Mon-thu4. |
Mon-thu4.life – What is It All About? Is It Legit?
Mon-thu4 is a website that pop-ups in the browser to display the following scary message:
VIRUS FOUND
A website you have visited today has infected your Mac with a virus.
Press OK to begin the repair process.
Another variant of the same scam message that can be displayed by various other bogus websites like Mon-thu4.life claims:
VIRUS FOUND
A website you have visited today has infected your Mac with a virus. A full system scan is now required to find and remove harmful files or applications from your Mac OS X device.
DEVICE INFORMATION
Brand: Apple
Device: Mac OS X 10_14_6
Browser: Safari 12.1.2
Scan Now
Is Mon-thu4 a virus? Is your Mac infected with malware? No, it is a scam. A scam that aims to lure you into installing fake utilities like Advanced Mac Cleaner, Smart Mac Booster and Mac Auto Fixer.
Do not Interact with such messages if you want to keep your Mac safe from real malware infections. Do not call any number presented. Quit your browser, force quit if necessary. Hold the Shift key and restart your browser. Clear website data cookies. Check for extensions and remove any that you don’t need. Additionally, ensure to scan your system with a professional anti-malware tool. Shady websites like Mon-thu4.life and apps associated with them tend to drop a bunch of files that are developed to create entries in the StartupItems, create a separate user profile and can be misused for the delivery of other harmful software like Tarmac.
Quite often commonly used web browsers on Macs like Safari and Chrome load deceptive websites like Mon-thu4.life because of a potentially unwanted program that is installed on the system. Such a program may even be one of the programs advertised by the website Mon-thu4. Other techniques used for the spread of potentially unwanted applications include software bundles, freeware packages, fake software updates and others.
So it is very likely that you have unintentionally installed a PUP on your Mac by simply following the installation setup of a recently downloaded desired program. This annoying issue usually occurs due to improperly disclosed information about extra programs added in the installer of the main app. Sometimes the uncontemplated installation of extra apps can be avoided with the help of the options provided in the Advanced or Custom setup approach. Make sure to select it whenever it is available in the installer of a new app.
And as long as, an undesired program associated with Mon-thu4.life is running on your Mac it may be collecting various details of yours with the help of tracking technologies like cookies, web beacons, javascrips, and other.
Remove Mon-thu4 Pop-up on Mac
Unfortunately, Mon-thu4 and associated files cannot be uninstalled by simply closing the browser and dragging the undesired app to the Trash. If you want to remove the Mon-thu4 virus from your Mac OS in full we recommend that you use a specific anti-malware for Mac. The main goal of such a program is to scan your operating system and terminate the files with malicious behavior. It will also clean up any malicious code in your repositories. With a specific anti-malware program, youр Mac will be protected better in the future.
Gergana Ivanova
Highly motivated writer with 5+ years of experience writing for ransomware, malware, adware, PUPs, and other cybersecurity-related issues. As a writer, I strive to create content that is based on thorough technical research. I find joy in the process of creating articles that are easy to understand, informative, and useful. Follow me on Twitter (@IRGergana) for the latest in the field of computer, mobile, and online security.
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Steps to Prepare Before Removal:
Before starting to follow the steps below, be advised that you should first do the following preparations:
- Backup your files in case the worst happens.
- Make sure to have a device with these instructions on standy.
- Arm yourself with patience.
- 1. Scan for Mac Malware
- 2. Uninstall Risky Apps
- 3. Clean Your Browsers
Step 1: Scan for and remove Mon-thu4 files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as Mon-thu4, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Quick and Easy Mac Malware Video Removal Guide
Bonus Step: How to Make Your Mac Run Faster?
Mac machines maintain probably the fastest operating system out there. Still, Macs do become slow and sluggish sometimes. The video guide below examines all of the possible problems that may lead to your Mac being slower than usual as well as all of the steps that can help you to speed up your Mac.
Step 2: Uninstall Mon-thu4 and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
2. Find Activity Monitor and double-click it:
3. In the Activity Monitor look for any suspicious processes, belonging or related to Mon-thu4:
4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.
5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Mon-thu4. If you find it, right-click on the app and select “Move to Trash”.
6. Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Mon-thu4. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.
7. Remove any leftover files that might be related to this threat manually by following the sub-steps below:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove Mon-thu4 via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
1. Click on "Go" and Then "Go to Folder" as shown underneath:
2. Type in "/Library/LauchAgents/" and click Ok:
3. Delete all of the virus files that have similar or the same name as Mon-thu4. If you believe there is no such file, do not delete anything.
You can repeat the same procedure with the following other Library directories:
→ ~/Library/LaunchAgents
/Library/LaunchDaemons
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 3: Remove Mon-thu4 – related extensions from Safari / Chrome / Firefox
Mon-thu4-FAQ
What is Mon-thu4 on your Mac?
The Mon-thu4 threat is probably a potentially unwanted app. There is also a chance it could be related to Mac malware. If so, such apps tend to slow your Mac down significantly and display advertisements. They could also use cookies and other trackers to obtain browsing information from the installed web browsers on your Mac.
Can Macs Get Viruses?
Yes. As much as any other device, Apple computers do get malware. Apple devices may not be a frequent target by malware authors, but rest assured that almost all of the Apple devices can become infected with a threat.
What Types of Mac Threats Are There?
According to most malware researchers and cyber-security experts, the types of threats that can currently infect your Mac can be rogue antivirus programs, adware or hijackers (PUPs), Trojan horses, ransomware and crypto-miner malware.
What To Do If I Have a Mac Virus, Like Mon-thu4?
Do not panic! You can easily get rid of most Mac threats by firstly isolating them and then removing them. One recommended way to do that is by using a reputable malware removal software that can take care of the removal automatically for you.
There are many Mac anti-malware apps out there that you can choose from. SpyHunter for Mac is one of the reccomended Mac anti-malware apps, that can scan for free and detect any viruses. This saves time for manual removal that you would otherwise have to do.
How to Secure My Data from Mon-thu4?
With few simple actions. First and foremost, it is imperative that you follow these steps:
Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.
Step 2: Change all of your passwords, starting from your e-mail passwords.
Step 3: Enable two-factor authentication for protection of your important accounts.
Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activiites with your card.
Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.
Step 6: Change your Wi-Fi password.
Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.
Step 8: Install anti-malware software with real-time protection on every device you have.
Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.
If you follow these reccomendations, your network and Apple devices will become significantly more safe against any threats or information invasive software and be virus free and protected in the future too.
More tips you can find on our MacOS Virus section, where you can also ask any questions and comment about your Mac problems.
About the Mon-thu4 Research
The content we publish on SensorsTechForum.com, this Mon-thu4 how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific macOS issue.
How did we conduct the research on Mon-thu4?
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 Mac threats, especially adware and potentially unwanted apps (PUAs).
Furthermore, the research behind the Mon-thu4 threat is backed with VirusTotal.
To better understand the threat posed by Mac malware, please refer to the following articles which provide knowledgeable details.