Today on the World Wide Web you can find so many underwater reefs in the form of viruses that can not be counted. Naturally, all threats are classified by the method of penetration into the system, harm and methods of removal. Unfortunately, one of the most dangerous is the Trojan virus (or Trojan). What is this threat, we will try to consider. In the end, we’ll also figure out how to safely remove this muck from a computer or mobile device.
“Trojan” - what is it?
Trojan viruses are self-copying malware with their own or embedded executable codes in other applications that pose a serious enough threat to any computer or mobile system.
Most of the most affected systems are Windows and Android. Until recently, it was believed that such viruses do not work on UNIX-like OSes. However, just a few weeks ago, the "apple" mobile gadgets were also attacked by the virus. It is believed that the Trojan represents the threat. What is this virus, we will now see.
Analogy with history
Comparison with historical events is no coincidence. And before we figure out how to remove the Trojan virus, let us turn to the immortal work of Homer, The Iliad, which describes the capture of the rebellious Troy. As you know, it was impossible to get into the city in the usual way or to take it by storm, which is why it was decided to give the inhabitants a huge horse as a sign of reconciliation.
As it turned out, there were warriors inside him who opened the city gates, after which Troy fell. The Trojan program behaves in exactly the same way. What is most sad, such viruses do not spread spontaneously, like some other threats, but purposefully.
How the threat enters the system
The most common way that is used to penetrate a computer or mobile system is to disguise itself as some attractive program or even a standard program. In some cases, the virus may embed its own codes in existing applications (most often these are system services or user programs).
Finally, malicious codes can penetrate computers and networks in the form of graphic images or even HTML documents - either coming in email attachments or copied from removable media.
With all this, if the code is embedded in a standard application, it can still partially fulfill its functions, and the virus itself is activated when the corresponding service is launched. Worse when the service is in startup and starts with the system.
Effects of exposure
As for the impact of the virus, it can partially cause system failures or disruption of Internet access. But this is not his main goal. The main task of the Trojan is to steal confidential data for the purpose of their use by third parties.
Here you will find the PIN codes of bank cards, and logins with passwords for access to certain Internet resources, and state registration data (numbers and series of passports, personal identification numbers, etc.), in general, everything that is not subject to disclosure, in the opinion of the owner of the computer or mobile device (of course, provided that such data is stored there).
Alas, when stealing such information, it is impossible to predict how it will be used in the future. On the other hand, you should not be surprised if somehow you get a call from a bank and say that you have a loan debt, or all the money is lost from a bank card. And these are just flowers.
Removing a virus in Windows
Now let's move on to the most important thing: how to remove the Trojan virus. To do this is not as simple as some naive users believe. Of course, in some cases, you can find and neutralize the body of the virus, but since, as mentioned above, it is able to create its own copies, and not one or two, their search and removal can be a real headache. At the same time, neither a firewall nor full-time anti-virus protection, if the virus has already been skipped and has been introduced into the system, will help.
In this case, it is recommended to remove the trojan using portable anti-virus utilities, and in case of capturing RAM, special programs downloaded before launching the OS from an optical medium (disk) or USB device.
Among portable applications, products like Dr. Web Cure It and Kaspersky Virus Removal Tool. Of the disk programs, Kaspersky Rescue Disc is the most functional. It goes without saying that their use is not a dogma. Today, such software can be found as many as you want.
How to remove a trojan from Android
As for Android systems, it is not so simple. Portable applications for them have not been created. In principle, as an option, you can try to connect the device to a computer and scan the internal and external memory with a computer utility. But if you look at the reverse side of the coin, where is the guarantee that when connected, the virus will not penetrate the computer already?
In such a situation, the problem of how to remove the trojan from Android is solved by installing the appropriate software, for example, from the Google Market. Of course, there are so many things here that you are simply at a loss about what to choose.
But the majority of experts and experts in the field of data protection are inclined to think that the 360 Security application is the best, which can not only detect threats of almost all known types, but also provide comprehensive protection for the mobile device in the future. It goes without saying that it will constantly hang in the RAM, creating an additional load, but, you see, security is still more important.
What you should pay attention to
So we figured out the topic “Trojan - what is this type of virus?”. Separately, I want to draw the attention of users of all systems, without exception, to a few more points. First of all, before opening mail attachments, always check them with antivirus. When installing programs, carefully read the suggestions for installing additional components such as add-ons or browser panels (the virus can also be masked there). Do not visit dubious sites if you see an anti-virus warning. Do not use the simplest free antiviruses (it is better to install the same Eset Smart Security package and activate using free keys every 30 days). Finally, store passwords, pin codes, bank card numbers, and generally all confidential information in encrypted form exclusively on removable media. Only in this case can one be at least partially sure that they will not be stolen or, even worse, used for malicious purposes.