Banker Trojans -This type of Trojan specifically targets personal information used for banking and other online transactions. Distributed Denial of Service DDoS Trojans - These are programmed to execute DDoS attacks, where a network or machine is disabled by a flood of requests originating from many different sources. Downloader Trojans -These are files written to download additional malware, often including more Trojans, onto a device. Because Trojans are used as a delivery device for a number of different types of malware, if you suspect your device may have been breached by a Trojan, you should look for many of the same telltale signs of malicious software.
These may include:. Poor device performance- Is your computer or mobile device running slowly or crashing more frequently than normal? Pop-up and spam interruptions- Are you noticing an uptick in the number of interruptions from browser pop-ups or email spam?
Enter any unrecognized file names or programs into a search engine to determine if they are recognized Trojans. Zeus - Also known as Zbot, Zeus is a successful Trojan malware package with many variants used to carry out a number of different types of attack. Department of Transportation. Wirenet - Wirenet is a password-stealing Trojan notable for being among the first to target Linux and OSX users, many of whom were migrating from Windows operating systems based on perceived security flaws.
Often their main purpose is to prevent malicious programs being detected, in order to extend the period in which the programs can run on an infected computer. One of the best-known dropper Trojans is the Emotet malware, which has now been rendered harmless but which, in contrast to a backdoor Trojan, cannot execute any code on the PC itself.
Instead, it brings other malware with it, for example the banking Trojan Trickbot and the ransomware Ryuk. Droppers are therefore similar to downloader Trojans, the difference being that downloaders need a network resource to pull malware from the network.
Droppers themselves already contain the other malicious components in the program package. Both types of Trojan can be remotely updated in secret by the programmers responsible, for example so that virus scanners cannot detect them with new definitions. New functions can also be added in this way.
Banking Trojans are among the most widespread Trojans. Given the increasing acceptance of online banking, as well as the carelessness of some users, this is no wonder — they are a promising method for attackers to get their hands on money quickly. Their goal is to obtain the access credentials to bank accounts. To do this they use phishing techniques, for example by sending the alleged victims to a manipulated page where they are supposed to enter their access credentials.
Accordingly, when using online banking you should ensure that you use secure methods for verification, such as only the app of the respective bank, and never enter your access data on a web interface. Distributed denial-of-service DDoS attacks continue to haunt the web. In these attacks, a server or network is torpedoed with requests, usually by a botnet. In mid-June , for example, Amazon fended off a record attack on its servers.
For over three days, Amazon's web services were targeted with a data throughput of 2. There must be an enormous botnet to achieve that kind of computing power. Botnets consist of zombie computers, so to speak. On the face of it they are running normally, but they are also functioning silently as attackers. The reason for this is a Trojan with a backdoor component that slumbers unnoticed on the computer and, if necessary, is activated by its operator. If a botnet attack or a DDoS attack is successful, websites or even entire networks are no longer accessible.
Fake antivirus Trojans are particularly insidious. Instead of protecting, they get every device into serious trouble. With alleged virus findings, they want to cause panic among unsuspecting users and persuade them to purchase effective protection by paying a fee. But instead of a helpful virus scanner, the user only gets more problems, as their payment data is conveyed to the Trojan originator for further misuse. So if you suddenly get a virus warning in your browser when visiting a website, you should ignore this and only trust your system virus scanner.
This type of program steals user account information from online gamers. One could argue that these messengers are barely in use nowadays. However, even new messenger services are not immune to Trojans. As recently as December , a Windows Trojan was commandeered via a Telegram channel. Instant messaging should also be protected against dangerous phishing attacks.
In January , security researchers at Kaspersky discovered a Trojan called Skygofree. The malware has extremely advanced functions and can, for example, connect to Wi-Fi networks on its own, even if the user has deactivated the function on their device. The Skygofree Trojan can also monitor the popular messenger service WhatsApp.
It reads messages and can also steal them. They may seem like a relic from another century, yet they are still active and pose a significant threat. Faketoken, for example, sends mass SMS messages to expensive international numbers and disguises itself in the system as a standard SMS app. The smartphone owner has to pay the costs for this. These programs can harvest email addresses from your computer.
Trojans now not only target Windows computers, but also Mac computers and mobile devices. Accordingly, you should never feel too safe or be on the internet without up-to-date anti-malware protection such as Kaspersky Internet Security. Malware often gets onto computers via infected attachments, manipulated text messages or bogus websites. However, there are also secret service Trojans that can be installed on the target systems remotely without the user noticing and without any interaction on the part of the targets.
Cancel anytime. Start Free Trial. How do Trojans work? When you execute the program, the malware can spread to other files and damage your computer. Downloader Trojan This Trojan targets your already-infected computer.
Game-thief Trojan The losers here may be online gamers. This Trojan seeks to steal their account information. Infostealer Trojan As it sounds, this Trojan is after data on your infected computer.
Ransom Trojan This Trojan seeks a ransom to undo damage it has done to your computer. Remote Access Trojan This Trojan can give an attacker full control over your computer via a remote network connection. Rootkit Trojan A rootkit aims to hide or obscure an object on your infected computer. Trojan banker This Trojan takes aim at your financial accounts. Trojan IM This Trojan targets instant messaging.
It steals your logins and passwords on IM platforms. There are a lot more. Examples of Trojan malware attacks Trojan malware attacks can inflict a lot of damage.
Rakhni Trojan. This malware has been around since More recently, it can deliver ransomware or a cryptojacker allowing criminals to use your device to mine for cryptocurrency to infected computers. This banking Trojan is another oldie but baddie. It uses keystroke logging — recording your keystrokes as you log into your bank account, for instance — to steal your credentials and perhaps your account balance as well.
First, the dos: Computer security begins with installing and running an internet security suite. Run periodic diagnostic scans with your software. You can set it up so the program runs scans automatically during regular intervals. Cybercriminals tend to exploit security holes in outdated software programs.
In addition to operating system updates, you should also check for updates on other software that you use on your computer. Protect your accounts with complex, unique passwords.
Create a unique password for each account using a complex combination of letters, numbers, and symbols. Keep your personal information safe with firewalls. Back up your files regularly. If a Trojan infects your computer, this will help you to restore your data. Be careful with email attachments. To help stay safe, scan an email attachment first. Trojan war winners and losers A final note on Trojans for history and mythology buffs.
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