The sudden appearance of advertising banners on the desktop or pop-ups on top of open applications is one of the most common problems of smartphone owners Samsung. This system behavior usually indicates the presence of hidden malware that was accidentally installed along with a free app or game. Viral advertising is not only annoying and interferes with the use of the device, but also consumes Internet traffic and can also collect your personal data.
Fortunately, in most cases, re-flashing or a visit to the service center is not required to solve the problem. Modern shells One UI from the Korean company are equipped with powerful diagnostic tools that allow you to identify and neutralize the threat. In this article, we will analyze in detail the algorithms for finding the culprit, methods for forcibly stopping unwanted processes and setting up protection that will prevent re-infection of yours Galaxy.
How to identify a hidden malicious application
The first step in the fight against intrusive advertising is to find the source of the problem. Viruses often disguise themselves as system utilities, calculators, memory cleaners, or even wallpapers without having an icon on the desktop. To find such a parasite, you need to go to the main settings of the device and carefully analyze the list of installed software.
Go to the menu Settings → Applications and scroll through the entire list. Look for apps with a blank name, a missing icon, or those that were installed on the date the advertisement started appearing. Pay special attention to apps that consume a lot of energy or bandwidth even though you don't use them. If you notice a suspicious item that doesn't open or doesn't have an icon, it's almost certainly adware (adware).
In some cases, malicious code is injected into the browser through extensions or website notifications. Check your download history in Chrome or Samsung Internet for files with the extension .apkthat you do not remember downloading. Deleting such files and revoking permissions to display notifications for dubious sites often solves the problem without deleting the applications themselves.
⚠️ Attention: If, when you try to delete a suspicious application, the “Delete” button is inactive, it means that the malicious app has acquired device administrator rights. In this case, you first need to revoke these rights in the “Security” or “Biometrics and Protection” section, and only then uninstall.
Using the built-in Samsung antivirus
Smartphones Samsung come with a pre-installed solution from the company McAfee, integrated directly into the security system. This tool is capable of scanning your device for known threats, Trojans and spyware that cause pop-ups.
To run the scan, open Settings → Device maintenance → Protection. Click the "Scan Phone" button. The system will check all installed applications, files and system partitions for malicious code. If a threat is detected, the system will prompt you to immediately remove it or move it to quarantine.
It is important to regularly update the antivirus databases, although in the ecosystem One UI this happens automatically when there is a network connection. The built-in scanner is effective against widespread threats, but against complex, targeted attacks or completely new viruses, it may be less effective than specialized third-party solutions.
Periodically run a full scan of the device, even if advertising is not bothering you right now. This helps to identify “sleeping” threats that are activated under certain conditions.
Manual removal through Safe Mode
If a virus blocks the removal of applications or constantly displays ads, preventing you from getting to the settings, the only way out is to download to Safe Mode (Safe Mode). In this mode, the phone starts only with basic system applications, and all third-party software is temporarily disabled, which allows you to safely remove the pest.
To enter this mode on modern models Samsung, press and hold the power off button until a menu appears on the screen. Then press and hold your finger on the Power Off icon on the touchscreen. A request to switch to safe mode will appear - confirm the action. The phone will reboot, and you will see the corresponding message in the lower left corner of the screen.
While in safe mode, go back to the list of applications and remove all suspicious apps that you identified earlier. Since the virus is not currently active, it will not be able to resist removal. After cleaning, simply reboot your phone in the usual way to exit safe mode and check the operation of the system.
☑️ Algorithm of actions in safe mode
Clearing the browser cache and resetting notifications
Often the source of annoying banners is not individual applications, but permissions, issued to websites in the browser. Attackers use technology Push notificationsto show ads even when the browser is closed. This is not a virus in the classical sense, but it acts in a similar way.
To fix the problem, go to the settings of the browser you use most often (for example, Chrome). Go to section Settings → Privacy and Security → Site Settings → Notifications. Here you will see a list of all resources that are allowed to send notifications. Find sites with strange names or those that you did not consciously subscribe to and block them.
It is also recommended to completely clear your cache and browser data. This will remove temporary files, cookies and scripts that may redirect you to advertising pages. Remember that clearing browser data will also delete saved passwords and browsing history if they are not synced with the account Google.
| Threat type | Symptoms | Solution method |
|---|---|---|
| Adware application | Advertising on the desktop, system lags | Uninstalling an application in Safe Mode |
| Browser Push | Notifications in the curtain from sites | Blocking notifications in the browser settings |
| Trojan encryptor | Lock the screen, demand money | Reset settings or help from a specialist |
| Hidden miner | Strong heating, fast discharge | Search for an application with high power consumption |
⚠️ Attention: The browser settings interface may differ depending on the version Android and the specific browser (Samsung Internet, Chrome, Opera). If you do not find the item you need, use the search inside the settings menu for the word “Notifications.”
Reset to factory settings as a last resort
If none of the above methods helped get rid of ads, and the phone continues to behave incorrectly, a virus may have penetrated deep into the system or damaged system files. In such a situation, the most reliable method of treatment remains a complete reset of the device to factory settings (Hard Reset).
This procedure will completely delete all data from the internal memory of the phone, including photos, contacts, messages and installed applications. Therefore, it is critical before starting the process to create a backup copy of important data in the cloud storage Google Drive or on your computer. Make sure you remember the password for your Google account, since after resetting the device will ask you for it proof of ownership (FRP protection).
To perform a reset, go to Settings → General settings → Reset → Data reset. Read the system warning and confirm the action. The phone will reboot and begin the cleaning process, which may take a few minutes. Once completed, you will receive the device in the same condition as when you purchased it from the store.
What to do if the phone does not turn on after a virus?
If malware has damaged the bootloader and the smartphone does not turn on, try entering Recovery mode by holding the Volume Up + Power buttons. In this menu, you can try to perform a wipe data/factory reset. If this does not help, you will need to flash it through the Odin app. computer.
Preventing re-infection of the device
After successfully removing the virus, it is important to change your smartphone usage habits to avoid re-infection. The main reason for infection is installing applications from unverified sources. Try to download software only from the official store Google Play, where all apps are pre-checked for security.
In your security settings Samsung Make sure the Unknown Sources feature is disabled or limited. This will prevent the installation of APK files downloaded from instant messengers or browsers without your explicit approval for each specific application. Also regularly update your operating system and installed applications, as updates often contain patches for vulnerabilities that viruses exploit.
Be careful when clicking on links in SMS messages from unknown numbers or in emails. Phishing sites often disguise themselves as pages of banks or popular services, trying to trick you into downloading an “antivirus” or “update” that is actually a malicious file.
The main principle of security on Android is not to give applications unnecessary permissions. If a simple flashlight asks for access to your contacts and microphone, this is a reason to immediately remove it.
Why do advertisements appear even after uninstalling the application?
This may be due to the fact that the virus managed to install additional modules or hidden shortcuts. It is also possible that the permission to show notifications remains active for a specific site in the browser. You need to check the list of notifications and clear the browser cache.
Can a virus on Android steal money from a card?
The adware itself usually only displays banners. However, it may redirect you to phishing sites where you enter your card details yourself. More dangerous Trojans can intercept SMS with verification codes if you have given them the appropriate permissions.
Do you need to install a third-party antivirus on Samsung?
For most users, the built-in McAfee scanner and the Google Play Protect system are quite enough. Third-party antiviruses can be useful if you frequently install apps from third-party sources or visit questionable sites, but they can also slow down your device.
How to distinguish a system app from a virus?
System apps usually have a gear icon or manufacturer's logo, can't be removed (only disabled), and are found at the top of the list or in the "Built-in apps" section. Viruses often do not have an icon, have strange names or duplicate the names of system utilities.
What are administrator rights and why does a virus require them?
Device administrator rights give the application full control over the phone, including the ability to lock the screen, erase data and prohibit its deletion. Viruses require these rights so that the user cannot easily get rid of them. Never grant these rights to unknown applications.