Malware is an umbrella term used to identify any type of malicious software capable of sneaking into a computer, mobile device, or corporate network without the user’s authorization, with the purpose of stealing confidential data, spying on victims, or causing more or less serious damage to the computer system in which it is running.
Typically, a malware is unable to physically damage affected hardware or network devices with its malicious code. Therefore, the only way to detect the presence of malware in a computer system is by analyzing any abnormal and suspicious behavior, such as decreasing computer performance, unauthorized modification of the browser’s home page, and continuous crashing of the operating system.
To remove all possible malicious code from a device, it is advisable to rely on an antimalware program. Even though efficient, antimalware alone may not be enough to defend against and prevent. Once the “physical” cleaning of malware is finished, it is then advisable to change the passwords of the PC, smartphone, or tablet, as well as the one used for e-mail and various e-commerce sites.
Trojans or “trojan horses” are a particular type of malware that criminals can use to take complete control of our device, mobile or stationary, and perform almost any type of operation: blocking, modifying, deleting data, or knocking out the computer system.
This virus presents itself as a seemingly useful file: it hides inside formally harmless programs that prompt the user to install them. Once downloaded, it acts silently, without the computer owner knowing its nature, thus enabling criminals to perform various actions:
Trojans do not spread on their own but must be downloaded by the user who has an active role in propagating the malicious program.