Trojans

• It is disguised as legitimate software
• It does not self-replicate, unlike a virus or worm.
• It opens backdoors to control the device or install more malware.
• It is difficult to detect without an adequate security tool.

The effects of a Trojan vary depending on its purpose. Some of the most common actions include:

• Remote control of the device: Attackers can control a device as if they were in front of it.
• Data theft: Access to passwords, banking information, personal documents, etc.
• Installation of other types of malware: ransomware, spyware, adware, etc.
• Forming part of botnets: Your device can be used in massive attacks without your knowledge.

Many Trojans are designed to remain hidden for long periods of time, operating in the background.

In recent years, particularly harmful Trojan variants have emerged. Below, we look at some of the most infamous:

Emotet

A banker Trojan capable of stealing users’ credentials and spreading rapidly across networks. It typically spreads via emails with infected attachments.

FluBot

This mainly affects Android users. Spread via fake SMS messages, it can intercept messages and steal personal data.

Metamorfo

Another banker Trojan designed to steal financial credentials through advanced keylogging techniques and tampering with online forms.

Zeus

One of the best-known Trojans, it was designed to steal financial information and control browsers. Zeus is still the model on which today's Trojans are based.

xHelper

This hides on Android devices and is extremely difficult to remove. It can reinstall itself even after a factory reset. It masquerades as a cleaning app.

Trojans spread through social engineering and covert distribution techniques:

• Fake emails with infected attachments.
• Unofficial smartphone apps or from stores other than the official ones.
• Malicious links on social media, SMS, or WhatsApp.
• Downloads from unsafe or dubious websites.

Recent cases even show fake online video meetings as a ruse to distribute Trojans disguised as plug-ins or updates.

1. Use a Reliable Antivirus

A security solution such as Panda Dome provides real-time protection against Trojans and other threats.

2. Don't Download Files from Unknown Sources

Avoid installing programs or opening documents from suspicious emails or unofficial sites.

3. Keep Your System Up To Date

Regular updates fix vulnerabilities that Trojans could exploit.

4. Use Strong, Unique Passwords

Doing this can prevent credential theft if a Trojan tries to access your accounts. You can use Panda Dome's free password generator to create strong, secure passwords. Or, for a more advanced option, Panda Dome Password Manager can help you manage your passwords and securely store your personal information.

5. Check Activity on Your Devices

Strange behavior, sudden slowdowns, or unauthorized connections can all be signs of infection.