Malware
Trojan horse
Trojan
A program that looks legitimate while installing a hidden malicious function.
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MIGHT YOU BE AFFECTED?
Turn knowledge into action.
How does this work?
Unlike a virus, it does not necessarily replicate: it deceives the user into installing it.
REAL-WORLD EXAMPLE
« A fake free application silently installs a backdoor. »
Typical sequence
- 1Present itself as useful software
- 2Persuade someone to install it
- 3Open a hidden access path
Warning signs
- Unknown application
- Unusual network connections
- Security protections disabled
How to protect yourself
- Download from the publisher
- Check the file signature
- Use an account without administrator rights
If you think you are affected
Stop the affected activity, isolate exposed devices or accounts, preserve evidence, revoke suspicious access and contact the appropriate security professional.
Last updated: 6 September 2026