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How are Trojan Viruses Spread and How to Protect Against It

Trojan Horse Attack
Trojan Horse Attack

What is a Trojan?

Trojans or a Trojan horse are typically malicious software programs designed to carry out a specific activity on the targeted computer system or device. Unlike viruses, Trojans cannot spread on their own. It means they take the help of other malware to download them onto the infected computer system and install further.

A trojan can sometimes take the form of any legitimate programs or application or even imitates to be a useful system file. Thus, users can accidentally get Trojans from an infected website, freeware downloads or spam mail attachments.

What harm a Trojan can do the infected computer system?

There are numerous varieties of Trojan out in the wild and all have distinct functions to perform after a successful intrusion on a machine. Here are some common activities which a Trojan or Trojan horse may perform:

  • Use the open network connection to download and install other threats like malware, spyware, worms so on.
  • Modify system crucial settings, overwrite registries, tamper installed applications, shutdown firewall and sometimes even affect hard drive.
  • Use the traffic of the infected device to redirect to hacked web pages, click frauds and lots of pop-ups.
  • Silently monitor online activities of the user, record keystrokes and send the collected information to its authors or any malicious hacker
  • The collected information includes website visited, passwords, login credentials for websites, browsing history and system related information.
  • Uses C&C (command and control) and install an FTP server to give the control of the infected device to a malicious hacker.

How to Know if your device is infected with a Trojan?

If your computer is infected with a Trojan threat, then it may give a certain sign of its existence which is enough to tell that your computer is infected. Here are some of the typical warning signs and symptoms which will help you to decide whether your computer is infected with Trojan.

  • Your computer may act strange, take lots of time to load the applications;
  • Desktop floods with unknown errors, warning, and pop-ups;
  • Applications like games, anti-virus, and other legitimate programs won’t start;
  • Trouble while connecting to Internet and web pages load very slowly;
  • Desktop icons are gone or replaced by some unknown ones;
  • Firewall is shut down and antivirus applications stop running or show frequent alerts;
  • Lots of processes running within task manager consuming huge system resources.

Well, there are lots of the signs and symptoms of an infected machine, but these are enough to alert you of the current situation of your computer system.

Hence, it is the time to take corrective actions to detect the Trojan threat and remove it from the infected machine.

How to Remove a Trojan or Trojan horse from an infected device?

Trojans program does a lot of changes to the host machine to silently executes lots of activities within the background. It also downloads and installs other malware which is difficult find manually as it may appear to be a legitimate program file but it could be actually a Trojan or a malware.

Thus, security experts never recommend attempting manual removal for a Trojan threat as it may cause an adverse effect on the computer and further leads to complete damage.  Always go a reputable and powerful anti-malware scan to your infected system to detect and remove the Trojan threat.

Here we will guide you the effective ways to get rid of Trojan virus from your computer system.

How To Avoid Getting Infected With Trojan?

  1. Always keep your operating system updated. This will avoid any security flaws or patches which gives a clear chance to the Trojans or malicious programs to be easily released on your computer system.
  2. Avoid downloading freeware and shareware file, apps and programs from third-party sites. Downloading freeware from untrusted sources could be risky as they may bundle or hide other malicious programs which are not revealed to you. Even if you are downloading any stuff be it game crack codes, apps, free programs from any other website then be cautious at the time of installing that you choose “Custom” or “Advanced” installation procedure and never allow additional programs to be installed.
  3. Do not open spam mail attachments arrived from an unknown sender. It is a common method used for malware intruders to disguise the payloads of the threat within the spam mail attachments. If any user accidentally downloads the attachments, then the virus can be installed silently on the system.
  4. Avoid clicking on suspicious links or any pop-ups appearing on redirected sites. These links could be dangerous and may disguise malware instead of the showing program updates like flash player, Adobe reader, browser versions or any extensions. Never perform any updates from those links.
  5. Never disable your firewall and always keep anti-virus update. Disabling firewall or keeping your system unprotected could be very risky, it is just like giving an open invitation to the Trojans and malware to host inside your computer system and do harmful conducts.

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UnboxHow Team

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