Fake antivirus Trojansįake antivirus Trojans are particularly insidious. If a botnet attack or a DDoS attack is successful, websites or even entire networks are no longer accessible. 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. On the face of it they are running normally, but they are also functioning silently as attackers. Botnets consist of zombie computers, so to speak. There must be an enormous botnet to achieve that kind of computing power. For over three days, Amazon's web services were targeted with a data throughput of 2.3 terabytes per second. In mid-June 2020, for example, Amazon fended off a record attack on its servers.
In these attacks, a server or network is torpedoed with requests, usually by a botnet. DDoS Trojansĭistributed denial-of-service (DDoS) attacks continue to haunt the web. 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. 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. Their goal is to obtain the access credentials to bank accounts. 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. Banking Trojansīanking Trojans are among the most widespread Trojans. New functions can also be added in this way. 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. Droppers themselves already contain the other malicious components in the program package. Droppers are therefore similar to downloader Trojans, the difference being that downloaders need a network resource to pull malware from the network. Instead, it brings other malware with it, for example the banking Trojan Trickbot and the ransomware Ryuk.
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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. 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. Rootkits are designed to conceal certain objects or activities in your system. ExploitĮxploits are programs that contain data or code that take advantage of a vulnerability within an application on your computer. Furthermore, backdoors can allow code and commands to be executed on your device or monitor your web traffic. Without your knowledge, your computer becomes part of a zombie network that is used for attacks. A backdoor is often used to set up botnets. This is because they can either load all sorts of malware onto your system in their role as a gateway, or at least ensure that your computer is vulnerable to attack. They are one of the simplest but potentially most dangerous types of Trojan. Unlike computer viruses and worms, Trojans are not able to self-replicate.
It does this by reading passwords, recording keyboard strokes or opening the door for further malware that can even take the entire computer hostage. For what once stood for a brilliant trick and a masterful feat of engineering is nowadays regarded as a malicious digital pest whose sole aim is to wreak havoc on its victims' computers unnoticed. Thousands of years later, the myth of the Trojan horse still lives on, albeit today in an unflattering connotation. The Greeks had finally succeeded in capturing the long besieged city of Troy, bringing the Trojan War to an end. When the horse's belly opened at night it was too late.
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