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You can also shoot down a "Trojan Horse"

Cavalo de Troia


The expression 'Trojan Horse' first appeared in Greek mythology.

The story goes that the Greeks sent the Trojans a peace offering - an enormous wooden horse. However, a group of Greek soldiers were hiding inside it and waited till nightfall to open the city gates and take over Troy.

Modern trojan horses are malicious computer programmes that look like useful software but in fact compromise your and your computer's security.

Protect your computer. It's all up to you!

What they do

Modern trojan horses, simply called 'trojans', are bits of malicious computer code which carry out unauthorised actions and may harm, cause unexpected behaviour and put your system's security at risk by opening up a hidden backdoor. This type of computer programme may allow the person running it to:

  • Steal user credentials (passwords, codes, etc.);
  • Steal personal details stored on your computer;
  • Copy data (documents, files, etc.);
  • Create, within your network, a security breach, thus granting access to protected areas in the network and allowing others to cause damage.

How Trojans get into your PC

Trojans are installed whenever a user carries out a certain action:

Either by opening an attachment that has come with an alluring email; 

Or accessing certain websites, and clicking on certain  links that will download and run specific software;

Installing a CD/DVD that someone offered you with dangerous software on it.

Any one of these situations might give way to a trojan entering your system.

The symptoms

A trojan infection bears the following symptoms:

  • Abnormal activity of modem, network card or hard drive: data is loaded without any user action;
  • Strange mouse reactions;  
  • Software programmes open suddenly;
  • Recurring computer freezes.

How to bring down a trojan

Some protective measures can prevent certain effects malicious code may set off, namely:

Using antivirus and antispyware software and keeping it updated, applying its patches and security fixes;

Using a firewall;

Setting up your internet equipment correctly.



Protect your computer. It depends a lot on you!

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