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[Tips & Guides] [MIUI with Tom #31] Virus for Android devices. Is it a myth or reality?!

2020-10-15 15:18:19
3308 96

Hello Dear MIUI Fan's!
Today i want talk with you about viruses on Android devices. Is it a myth or reality?!
First you need to understand what viruses are on a smartphone and the ways of their distribution to devices.

Mobile viruses - are small programs designed to interfere with the operation of a mobile phone, smartphone, or communicator, which record, damage or delete data and spread to other devices via SMS and the Internet.

The word "virus" as applied not only to medicine, but to information technology, has long been familiar to everyone, and I think you have also come across this. And lately, there are more and more fears that your smartphone, and not just your computer, may be infected with a virus. Is it so? Let's figure it out

The fact is that the word "virus" itself is almost always used incorrectly, even by those who are well versed in this, or at least should. And if ordinary people are forgivable, then there is a special demand for representatives of some antivirus companies, which, in theory, should understand this topic better than anyone else. But sometimes they make mistakes too.

So, a "virus" is a program that can independently create copies of itself and infect various files with itself, not only the user's files but also the operating system. It also knows how to embed itself in the code of other programs, "settle" in various areas of memory (including system and boot memory) and, importantly, extend itself to other computers through storage devices (USB media, portable hard drives, letters, smartphones, etc). In general, a computer virus behaves in almost the same way as its "biological" brother)) - that's why it got its name. The introduction of a computer virus into the code of programs and memory areas is called "infection".

But this is more for a PC than a smartphone. The algorithm of the virus on a PC is very different from the algorithm of the work on a smartphone.
For example, to infect a PC, you just need to go to some kind of site and through the cache or cookies you can get infected. But with a smartphone, everything is much more complicated, since everything works through installation and, of course, through permissions.

On Android, applications have more freedom of action, but now everything is pretty safe there — for example, on older versions of android, every time you installed and launched something for the first time, you saw a list of permissions that the program asks for. Moreover, in modern versions of Android, it became possible to issue not all permissions at once, but a certain set - which you deem necessary.

What viruses can?
1. Steal money from a SIM card: make calls or send SMS to premium numbers until the SIM card runs out of money.
2. Steal information: send passwords from online banks, social networks, bank card data or personal files, send messages with viral links to numbers from your address book on your behalf.
3. Block device from normal operation: Display a ransomware banner that prevents the device from being used.
4. Use the power of your device: show hidden ads or mine cryptocurrencies.
5. Transfer personal information to third parties: email address for advertising mailings, phone numbers for SMS advertising, etc.

How viruses get on a smartphone or tablet
Scammers disguise viruses as harmless applications and files: browsers, players, games, navigators, books, antiviruses, and so on. Then they distribute them:

1. On sites with hacked applications and pirated films, torrent trackers, etc.

2. By SMS, MMS and Email
As a rule, these are SMS from "girls from dating sites", from free classifieds sites, letters from notaries, messages about winning the lottery, and other tricks.

If you have already installed a virus program on your smartphone and run it, a list of permissions will appear. Permissions are actions that an application can take after installation.
Most often, this will be the device administrator permission. If it asks, then in no case do not give it. If this is not an antivirus from the play market or the manufacturer's website, do not apply this right. It is most likely a ransomware or locker application. If give that right you will see next image on your device This is for example, many other image you can see.

How to tell a virus from a normal application
Most viruses are written by non-professionals who want to get money quickly and without any problems with the law. Therefore, the standard signs of such viruses are permissions for sending messages or calls. When such a virus is installed, it will quietly send SMS or call toll numbers. Similarly, it can ask for those permissions that it does not need: access to the device memory, to the call log, and of course to become the device administrator as I described above.
Also, viruses can very often be disguised as known applications, but in fact they have nothing to do with it. I met a virus with icons of Google Chrome, MX Player and of course icons of famous games.

How to protect your smartphone or tablet from viruses
1. Install applications only from the Play Store and take their choice seriously, or if you download from unverified sources - always see what the application asks for from permissions!
It is very difficult for an untrained person to distinguish a virus from a normal application.
2. Do not follow unknown links in SMS, MMS or mail
Scammers have even learned to spoof numbers and email addresses, so messages with viral links can come from your friends too.
3. Do not root the device or install unofficial firmware
If the device has a root, the virus will be able to register in system applications and then only a complete flashing of the device can remove it. So why are custom firmwares on this list !? You cannot be sure of the developer's integrity. And what is the benefit to someone making such firmware free, think about it. Perhaps your personal data is resold to third parties (for spam by mail or SMS).
4. Disable automatic receipt of MMS on your device
Fraudsters can automatically download viruses to the device via MMS, since the content of such a message can be automatically downloaded via the mobile Internet. This is due to vulnerabilities in the Stagefright library.
5. Do not connect the Auto Payment banking service (automatic replenishment of the phone number balance).
This vulnerability can be exploited by fraudsters to generate a request to top up another number.

How to understand that a virus has appeared on a smartphone or tablet
There are no definite signs, it all depends on the virus. Some are noticeable immediately after installation (a banner appears and access to the device is blocked), others may not give themselves out for a long time. In most cases, the symptoms are:
  • Big SMS or call bills appear;
  • A banner appears with a demand to pay scammers, which does not allow using the device;
  • Unfamiliar programs appear;
  • The battery starts to run out very quickly;
  • Internet traffic is quickly consumed by incomprehensible applications;
  • The device starts to slow down strongly.

Do I need an antivirus on Android
If you are a novice user and are not confident in your abilities, you need one. But only one.
If you use the device carefully and follow the safety rules, you do not need to install an antivirus.

Are there any viruses on Android or not !?
They are not, most likely the programs are ransomware. There are no viruses for Android similar to viruses for PC! Be careful when granting permissions to your applications!
Mainly, users are to blame for infecting devices with such programs. And of course, in those cases when you really really want benefits or something free.
Thanks to all for your time!
Also thanks to Admin MIUI Community!
Related thread:
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[MIUI with Tom #27] How to Create or Delete Mi Account!
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[MIUI with Tom #30] How to Change animation speed to yours value without ROOT!


Number of participants 5 Experience +52 Pack Reason

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2020-10-15 15:18:19
Favorites76 RateRate

Mi Fans Team

the other improv | from Mi 9T


Thanks for information
2020-10-15 15:28:41
WOW, Amazing explanation and Awesome analysis, Thanks for your Efforts, Time and sharing
2020-10-15 15:39:27

Master Bunny

Perfectsolo | from app


Well explained
2020-10-15 15:51:10

Wizard Bunny

BeingBishal | from Mi 9T Pro


Informative Thread!
2020-10-15 16:55:17

Master Bunny

Leonitis | from Redmi Note 7


Thanks for sharing, interesting information
2020-10-15 17:16:38

Pro Bunny

Hydra1704 | from Redmi Note 8T


Thanks for sharing! You did an amazing explanation! I bet it will help some newbies.
2020-10-15 17:26:19
2020-10-15 18:06:43
nice information
2020-10-15 18:15:39

Mi Fans Team

RafaelKamui | from Redmi Note 9 Pro


thanks for sharing
2020-10-15 18:24:17

Grand Master Bunny

arawak8 | from app


Thanks for the information
2020-10-15 18:29:41
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