What Is the Trojan Horse Virus and How to Guard Against It?
Updated on October 21, 2022, by Xcitium
The trojan horse virus dates back to the 1980s, so it has been around for very a whereas. Still, numerous individuals don’t know what is the trojan horse virus and are tricked by cybercriminals into downloading one.
To understand the basics of what is the trojan horse virus, one should look toward its name. In the Greek mythology of the Battle of Troy, the enemy assembled an immense wooden horse. They hid within it and offered it to the Trojans as a gesture of harmony. In the evening, the enemy, who had hidden inside the horse, burst out and ransacked Troy. The trojan horse virus does likewise to your devices. A cybercriminal will hide malware in what appears to be an ordinary program. The application installs the trojan horse virus, which will then assume control over your device. The trojan horse virus takes data and keeps infecting malware throughout the system.
How Does a Trojan Horse Virus Work?
How a Trojan Horse Infects a Computer
- The attacker disguises malware as legitimate software or a trusted file.
- The user downloads or opens the file.
- The Trojan installs silently in the background.
- It bypasses or attempts to evade security controls.
- The malware performs its malicious actions, such as:
- Stealing credentials
- Downloading additional malware
- Encrypting files
- Monitoring user activity
- Opening a backdoor for attackers
Trojan Horse vs Computer Virus
Many users confuse these two threats.
| Trojan Horse | Computer Virus |
|---|---|
| Disguises itself as legitimate software | Attaches itself to legitimate files or programs |
| Requires user interaction to execute | Can spread automatically after execution |
| Does not self-replicate | Self-replicates by infecting other files |
| Often creates backdoors | Primarily infects and spreads |
| Frequently delivers other malware | Primarily focuses on replication |
TROJAN HORSE VIRUS TYPES
Like most online threats, trojan horse viruses come in many varieties. An infostealer trojan horse virus has a particular intent to get information. A distributed denial of services (DDoS) trojan horse virus floods a network to bring it down.
Another common type is the backdoor trojan horse virus. As its name suggests, it permits the cybercriminal access to the device, which in turn, enables them to gain any data they need, as they can act as the user. They can then send malicious files and different infections to the user’s contacts and erase essential information or reset the PC.
There is an ongoing spike in phishing scams and ransomware. Trojan horse virus ransom attacks are also on the rise. This kind of trojan horse virus will change the information on your device and render it blocked off. Cybercriminals will then take steps to hold these vital files until a ransom is paid.
On Devices
Cybercriminals are focusing on devices rather than the usual tablets and laptops. Mobile ransomware and mobile banking trojan horse viruses have been prevalent in recent years. Often, smartphone trojan horse virus attacks happen during an application download. What seems to be a safe application is a fake download of malware. So, a user anticipating a legit app may end up with a trojan horse virus. These tend to be advertised on illegitimate sites, targeting individuals looking for a free copy of an application.
Once the malware has been installed, a cybercriminal will seize a device and send infected messages to the user’s contact list in the attempt to acquire more devices.
Remaining Secured
A basic technique for virus removal and to know what is the trojan horse virus is to use updated antivirus software that scans a device for potential threats. Knowing what is the trojan horse virus takes perseverance in staff training. Regular seminars and security campaigns are needed to keep employees mindful of what is the trojan horse virus. Figuring out how they can defend the organization’s information, as well as their own, from being attacked should be a priority to know what is the trojan horse virus.
A trojan horse virus can have one or various damaging uses, which is what makes them so hazardous. It’s also essential to understand that unlike computer viruses, trojan horse virus is not self-imitating. Rather ,it is spread by users who download it, usually from an email attachment or by visiting a tainted site.
Keep in mind that the trojan horse virus is common because it is so successful. Cybercriminals use social engineering methods to get you to click on their email. Being aware of what is the trojan horse virus and how it works can keep you from having to deal with data fraud, financial loss, and huge downtime.
Ensure that everybody knows what is the trojan horse virus. Do not download any programs or files from dangerous sites. If an application is required for download onto an employee PC, get the IT team to assist and verify the safety of the application. This begins with careful checking of permissions to workers, ensuring that the least amount of permissions necessary are granted.
Disaster Recovery
Xcitium Backing up for quick and safe online data recovery and restoration is another significant protection against trojan horse virus attacks. Backup and recovery solutions can assist you with this. Backup and recovery includes everything on your physical hardware and virtual machines, for instance, the applications, operating system, settings, and information. With this, the recovery is complete. Advanced and automated verification of backup images shows you that the backups are working and ensures complete and reliable system recovery.
Signs of a Trojan Horse Infection
Symptoms of a Trojan Horse Virus
Common warning signs include:
- Slow computer performance
- Unexpected pop-ups
- Frequent system crashes
- Unauthorized account activity
- Unknown applications appearing
- Disabled antivirus software
- Browser redirects
- High CPU or network usage
- Files disappearing or becoming encrypted
- Unusual outbound network traffic
How Trojan Horse Malware Spreads
Common Infection Methods
| Infection Method | Description |
|---|---|
| Phishing emails | Malicious attachments or links |
| Fake software downloads | Trojan disguised as legitimate software |
| Cracked or pirated software | Malware hidden in unauthorized applications |
| Malicious advertisements | Drive-by downloads from compromised ads |
| USB devices | Infected removable media |
| Fake browser updates | Fraudulent update prompts |
| Compromised websites | Downloads triggered from unsafe sites |
Risks of Trojan Horse Malware
What Damage Can a Trojan Cause?
A Trojan can:
- Steal passwords and credentials
- Capture banking information
- Install ransomware
- Download additional malware
- Spy on user activity
- Modify or delete files
- Join the device to a botnet
- Give attackers persistent remote access
How to Remove a Trojan Horse
Trojan Horse Removal Steps
- Disconnect the device from the internet if malicious activity is suspected.
- Boot into Safe Mode if necessary.
- Run a full scan using trusted endpoint security or anti-malware software.
- Quarantine or remove detected threats.
- Update the operating system and installed applications.
- Change passwords for sensitive accounts after the device is confirmed clean.
- Restore files from a verified backup if needed.
- Monitor systems for signs of reinfection.
How to Prevent Trojan Horse Attacks
Trojan Prevention Best Practices
- Keep operating systems and software updated.
- Download software only from trusted sources.
- Avoid opening suspicious email attachments.
- Verify links before clicking.
- Enable multi-factor authentication (MFA).
- Use endpoint protection with behavioral analysis.
- Restrict administrator privileges.
- Regularly back up important data.
- Educate users about phishing and social engineering.
- Monitor endpoints for unusual activity.
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