How to understand that Xiaomi virus: signs, diagnosis and treatment

Xiaomi’s MIUI-based smartphones are often targeted by malware, despite Google Play Protect’s built-in protection and its proprietary Security Scanner. Viruses can penetrate pirated APKs, phishing sites, or even firmware vulnerabilities. The main problem is that many users confuse infection symptoms with normal system failures. In 2023, for example, 38% of the calls to Xiaomi service centers complaining of “brake” were caused by malware, not hardware malfunctions.

In this article, we will analyze 12 key signs by which you can recognize a virus on Redmi, POCO Or Mi, including hidden symptoms that are not visible at first glance, and we will show you how to check the phone through Settings. → Memory. → Viruses, what tools to use for deep diagnosis (including: ADB), And what if the antivirus doesn't detect the threat, but the suspicions remain. MIUI vulnerabilities exploited by fraudsters, such as through Xiaomi Cloud services or pre-installed applications.

1. The main signs of the virus on Xiaomi: from obvious to hidden

Viruses on Xiaomi manifest themselves in different ways, from aggressive advertising to hidden cryptocurrency mining.-5 The most noticeable symptoms that should alert you:

• 📱 Spontaneous application installations: Unknown programs (e.g., com.system.update or android.service.secure) that you haven't installed appear on the menu, often masquerading as system utilities.
• 💸 Banker viruses (like Cerberus or Anubis) are intercepted SMS with confirmation codes and send payments to premium numbers or e-wallets.
• 🔋 Dramatic reduction in battery life: If the phone runs out in 2-3 hours in normal use, a mining bot may be running in the background (e.g. HiddenMiner).
• 🌐 Browser redirection: When you open any website, you are thrown onto pages with gambling, “winnings” or porn ads – a sign of adwar (advertising virus).
• 📡 Increased mobile internet traffic: Spyware viruses (such as Pegasus) can transfer your data to remote servers, consuming up to 1-2 GB of traffic per day.

Less obvious, but no less dangerous signs:

• 🔊 Unexpected sounds or vibrations: Some viruses produce short beeps or vibrate at random times to confirm their activity.
• 📎 Changes in settings. For example, debugging on USB Unknown sources without your knowledge.
• 📤 Spamming messages spontaneously. Contacts complaining of spam from your number are a sign of work SMS-bot.

⚠️ Warning: If after restarting the phone in safe mode (press the power button) → «Safe mode") symptoms disappear - the virus is almost certainly present.

2.How to check Xiaomi for viruses through built-in MIUI tools

Xiaomi is equipping its smartphones with two main tools for finding threats:

1. Security Scanner (Integrated Antivirus) MIUI):

Google Play Protect

• 🛡️ Open the Google Play Store → click on the profile avatar → Play Protect.
• 🔍 Run the check.The tool scans only apps installed through the Play Store.

If the built-in scanners found nothing, but suspicions remain, use advanced diagnostics:

💡

If you see packages with names like com.android.system.update or android.service.secure in ADB results, it's 99% virus. Delete them via adb uninstall.

3. Third-party antiviruses for Xiaomi: which really work

The built-in MIUI tools don't always cope with modern threats.

• 🛡️ Malwarebytes, which specializes in detecting adversaries, spies and Trojans, is a free version that scans on demand, without background.
• 🔍 Dr.Web Light is a Russian antivirus with high virus detection for Android.
• 📊 Bitdefender Mobile Security is a paid, 14-day trial that detects even rootkits and viruses masquerading as system processes.
• 🔗 Kaspersky Internet Security – effective against banking Trojans, but requires a lot of resources (can slow down on weak Redmis).

⚠️ Important: Do not install antiviruses from unknown sources - many of them contain viruses themselves.

If the antivirus has found a threat but cannot remove it:

1. Try to remove the application manually through Settings → Apps.
2. If the Remove button is inactive, it's system software or a virus with administrator rights.

Disable administrative rights from a suspicious application |

Remove the application through Settings → Applications|

Check autoboot (Settings → Battery → Autostart)|

Clear cache and browser data |

Reboot the phone-->

4. Hidden viruses: how to detect what antiviruses can’t see

Some viruses disguise themselves as system processes or exploit MIUI vulnerabilities to go undetected.

Method 1: Checking running processes

• Install the Simple System Monitor (no root required) application.
• Look at the list of running processes.

Method 2: Analysis of network activity

• Use NetGuard or PCAPdroid to monitor traffic.
• If the phone sends data to unknown IPs (especially in China, Russia or Eastern Europe) – this is a sign of spyware.

Method 3: Checking the File System

• Connect your phone to your PC and scan the /data/app and /system/app folders for unknown APKs.
• Note files with the.dex or.so extension in non-standard directories.

5. Viruses in firmware: what to do if the MIUI itself is infected

In rare cases, viruses enter the system partition of the phone — for example, through a fake firmware or a vulnerability in Recovery Mode.

• 🔄 The virus returns after resetting settings.
• 🔧 Antiviruses can’t remove the threat because it’s embedded in the system.
• 📱 The phone is acting strange even in safe mode.

If you suspect a firmware infection:

1. Check firmware integrity:

Check the phone.

• Use the Mi Flash Tool to reinstall MIUI completely.
• Select Clean All mode (erase all data, including viruses in the system partition).

⚠️ Note: If you have installed custom firmware (such as LineageOS or Pixel Experience), the risk of infection of the system partition increases by 5 times!

💡

The only reliable way to get rid of the virus in the firmware is a complete flashing through Fastboot with the official image of MIUI. Resetting (even through Recovery) does not always help!

6 How to Protect Xiaomi from Viruses in the Future

Prevention is the best way to avoid infection.

• 🔒 Disable the installation from unknown sources (Settings) → Confidentiality → Special permits).
• 🛡️ Update. MIUI Applications and Applications – New Versions Closing Vulnerabilities.
• 🚫 Don't install it. APK from unverified sources (torrents, Telegram channels, file sharing).
• 🔍 Scan your phone regularly (once every 1-2 weeks).
• 📱 Use an ad blocker (such as Blokada or AdGuard) to reduce the risk of infection through banners.
• 🔗 Do not follow suspicious links to SMS Or messengers (even if they came from friends – their accounts could be hacked).

Additional measures for advanced users:

• 🔧 Set up an alternative. DNS (For example, 1.1.1.1 or 8.8.8.8) to block phishing sites.
• 🛡️ Activate Google Play Protect in real time (Google Settings) → Security → Play Protect).

7. Frequent errors when removing viruses from Xiaomi

Many users make things worse by trying to "cure" the phone with the wrong methods.

• 🔄 Resetting settings via Recovery if the virus is in firmware – this will not help.

If you have already made one of these mistakes:

1. Follow the instructions in Section 5 (reflashing).

FAQ: Answers to Frequent Questions