What is a Trojan Attack? Understanding The Invisible Threat

Sumit Singh
September 5, 2023


From the home office to the boardroom, cybersecurity threats are pervasive. As technology advances, cyber threats evolve, with cybercriminals continually devising new ways to breach the most robust of security systems. Of these threats, a common but often misunderstood form is the Trojan attack. So, what is a Trojan attack, and how can it impact your cyber security infrastructure?


Named after the Greek myth of the Trojan horse, a Trojan attack (or a Trojan virus) deceives victims into willingly opening their digital gates to a malicious entity. On the surface, this program appears legitimate, often masquerading as desirable software, an email attachment, or a hyperlink within an email. Once the unsuspecting user opens, installs, or clicks on the disguised Trojan, the harmful code is executed, potentially causing significant damage to your system or data.

Unlike computer worms and viruses, Trojans don’t replicate themselves but pave the way for cybercriminals to access and control your system. This access can result in data theft, system damage, espionage, and even the creation of a backdoor into your network for future attacks.


Trojan attacks are not a monolith but rather a spectrum of malicious software, each with their unique characteristics and threat mechanisms. Some of the common types include:

  • Backdoor Trojans that grant cybercriminals control over the victim’s system, allowing them to send, receive, launch, and delete files.
  • Trojan-Bankers designed to steal account data for online banking systems, e-payment systems, and credit or debit cards.
  • Trojan-Ransom which modifies the data on a victim’s computer in such a way that the computer won’t correctly run again until a ransom is paid.


Trojans exploit gaps in security protocols, lack of user awareness, and sometimes even the sophisticated tactics of social engineering. How can you fortify your systems against such invisible threats?

  1. Regular Updates: Ensure your systems and applications are regularly updated. These updates often include patches for security vulnerabilities that Trojans might exploit.
  2. Security Software: Use reliable antivirus and anti-malware software. Regular scans can help detect and eliminate Trojans before they embed themselves into your system.
  3. Awareness and Training: Educating your team about safe online habits can drastically reduce the chance of a Trojan breaching your security. Consider implementing regular awareness training to equip your team with the knowledge and best practices to recognise potential threats.
  4. Penetration Testing: Regular penetration testing can simulate cyber attacks and expose potential vulnerabilities in your system.
  5. Secure Email Ecosystem: As Trojans often infiltrate systems through malicious emails, securing your email ecosystem is critical. InfoTrust can help your organisation implement a secure email ecosystem, reducing the risk of email-based Trojan attacks. Our AI-based technology is able to detect suspicious text patterns, tones, malicious links, and unusual IP addresses or locations.

Understanding what a Trojan attack is and the potential damage it can cause is the first step to securing your organisation’s digital assets. Implementing robust security measures, combined with the professional cyber security services provided by InfoTrust, can provide a resilient defence line against Trojan attacks and other cyber security threats.

Stay vigilant, stay informed, and stay safe with Infotrust. Your cyber security is our priority.