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Trojan Horses and How to Protect Yourself

In the vast landscape of cyber threats, the term “Trojan Horse” transcends its historical context and emerges as a modern metaphor in the field of cybersecurity, as one of the most deceptive and dangerous weapons in the hands of hackers and cybercriminals. A Trojan maliciously hides harmful code behind a harmless appearance. Understanding the nature of these threats and adopting solid protection practices is crucial to safeguarding our devices, data and identities in the digital age.

What is a Trojan horse?


A Trojan horse, also known as a "trojan", is a type of malware that deceives users by appearing harmless or beneficial, but in fact hides malicious functions. The term derives from the mythological story of the Trojan War, in which the Greeks presented the city of Troy with a large wooden horse that contained soldiers hidden inside. When the horse was brought inside the city walls, the soldiers got out of it and helped the Greeks invade and conquer Troy.

Likewise, a digital Trojan is a seemingly legitimate program, such as software, game or utility, that users are tricked into installing on their computers or devices. However, once the Trojan is executed, it can perform harmful actions without the user's knowledge. This may include activities such as:

  • Theft of personal information, such as passwords and banking details;

  • Installation of other malware;

  • Creation of access doors for hackers;

  • Physical damage to computer-controlled systems.

It is important to highlight that Trojan horses do not replicate automatically, like viruses, but depend on user interaction to be installed. They are often distributed through:

  • Malicious websites;

  • Email attachments;

  • Misleading links;

  • Illegal software downloads;

  • And even embedded in seemingly harmless apps.

Trojan horse protection


Here's how to protect yourself against a Trojan horse and other types of malware to keep your devices and information safe:

  1. Keep software up to date: The operating system, applications and antivirus programs must always be up to date. Frequent updates include security fixes for various vulnerabilities.

  2. Enable firewalls: Having firewalls enabled, both on the router and on the operating system, helps block malicious traffic.

  3. Check the source: Before installing any software or application, make sure it comes from a trusted source. Avoid dubious download sites.

  4. Use reputable antivirus software: Install reputable antivirus software and keep it updated to protect against known threats.

  5. Be wary of attachments and links: Do not click on suspicious links or download attachments from untrustworthy sources, especially if they are received via email or unsolicited messages.

  6. Be careful with USB devices: Avoid connecting unknown USB devices to your computer as they may carry malware. If necessary, scan them with an antivirus before opening or copying files.

  7. Enable two-factor authentication (2FA): Whenever possible, enable two-factor authentication for your accounts. This adds an extra layer of security.

  8. Make regular backups: Keep backup copies of your important files in a separate, secure location. This will help recover data in case of malware infection.

  9. Stay Informed: Be aware of the tactics and techniques used by cyber criminals. Ongoing education on cybersecurity is essential.

  10. Be wary of suspicious emails and messages: Trojans are often distributed through emails or messages that appear legitimate. Be on the lookout for grammar mistakes, suspicious email addresses, and requests for personal or financial information.

Remember, cybersecurity is an ongoing practice. Even following all these tips, there is still a minimal possibility of exposure to threats. Therefore, always be vigilant and up to date on the latest trends in cybersecurity.


In short, Trojans are a clear representation of the dark creativity of cybercriminals. They infiltrate undercover, aiming to exploit systems and valuable information. Protecting against this insidious tool that exploits users' ingenuity, compromises data and systems, and requires a multifaceted approach. This includes implementing firewalls, intrusion detection and antivirus systems, as well as continually educating users about the tactics used by hackers. Collaboration between users and security experts is critical to effectively defending against Trojans and other types of malware.


Tell us, have you ever received a Trojan horse? Don't forget to like and comment on our post!

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