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A smartphone that gets unusually hot, installs strange apps, or uses a lot of data could be a sign that it's infected with malware.
Smartphones have become an indispensable device for many people, but they are also a target for hackers. Similar to computers, bad guys can use different methods to trick users into clicking on virus-containing links, downloading malicious code, or even silently infecting users without their knowledge. In addition, many users are willing to install cracked applications of unknown origin, which can also cause problems for the device.
When infected with malware, smartphones are at risk of having personal information or sensitive data stolen, then sent to a remote server. Users can still recognize whether their phones are being attacked or not through some signs.
Illustration of a person wearing an Anonymous hacker mask holding a hacked smartphone. Photo:Phonebuff/YouTube
High data usage
Some smartphones allow you to display your network usage on the status bar. If not, you can check your monthly data usage in the settings.
According to security firm Norton, when mobile data usage is higher than usual, the device may have been hacked and infected with malware. This is because spyware or malware is constantly running on the phone and sending information to a remote server, thereby "consuming" more data than usual.
Strange application appears on screen
If you find an unfamiliar app on your phone screen, it could be a sign that your device has been compromised. Bad guys can install and uninstall apps for their own purposes, such as advertising, collecting data, spreading ransomware, or being part of a larger botnet.
Pop-up window keeps popping up
If you frequently encounter pop-up windows on your phone, there is a high chance that your smartphone has malware installed. Typically, these windows display unauthorized ads, containing malicious links that trick users into clicking.
Strange calls and messages
If the call history or text messages contain a number that is not in the phonebook or has never been called by the user, the smartphone may have been hacked. These calls may be eavesdropping, but they also cost the user money.
Hot, freezing
Typically, spyware records user behavior and sends it to the server, taking up a lot of smartphone resources. Not only does it cause the device to heat up abnormally even when not in use, it also slows down the device and even causes it to freeze.
Battery drains fast
Malware often uses a lot of resources to collect data, record user actions at any time, leading to faster battery drain than usual.
Strange sound
When making a call, if you hear beeps or unusual sounds during the conversation, it may be a sign that eavesdropping software is active. Therefore, it is best not to continue this call.
In addition, strange sounds may also appear abnormally even when the screen is not turned on or the user touches it. According to security experts, the microphone may have been activated silently.
How to fix
To avoid installing tracking software, users should limit applications of unknown origin, programs outside of Google Play or App Store. Access the device list and remove suspicious, unused software.
In case of doubt, users can install anti-virus software. However, if the situation still does not improve, it is recommended to restore the original settings to return the device to its factory state. However, some spyware programs may be pre-installed and installed deep in the device's operating system, only switching to another more secure device can help users get rid of the eavesdropping problem.
When detecting that the device has been tampered with, users should log out of all accounts, then change passwords and set up additional security measures.
According to VnExpress