![]() ![]() Characteristics of blended threats are that they cause harm to the infected system or network, they propagates using multiple methods, the attack can come from multiple points, and blended threats also exploit vulnerabilities. Blended threats can use server and Internet vulnerabilities to initiate, then transmit and also spread an attack. A blended threat is a more sophisticated attack that bundles some of the worst aspects of viruses, worms, Trojan horses and malicious code into one single threat. ![]() What Is a Blended Threat?Īdded into the mix, we also have what is called a blended threat. Unlike viruses and worms, Trojans do not reproduce by infecting other files nor do they self-replicate.įast Facts: Appears useful but damages system, requires human action to run, do not self-replicate. Trojans are also known to create a backdoor on your computer that gives malicious users access to your system, possibly allowing confidential or personal information to be compromised. Some Trojans are designed to be more annoying than malicious (like changing your desktop, adding silly active desktop icons) or they can cause serious damage by deleting files and destroying information on your system. When a Trojan is activated on your computer, the results can vary. Those on the receiving end of a Trojan Horse are usually tricked into opening them because they appear to be receiving legitimate software or files from a legitimate source. The Trojan Horse, at first glance will appear to be useful software but will actually do damage once installed or run on your computer. What Is a Trojan horse?Ī Trojan Horse is full of as much trickery as the mythological Trojan Horse it was named after. In recent worm attacks such as the much-talked-about Blaster Worm, the worm has been designed to tunnel into your system and allow malicious users to control your computer remotely.įast Facts: Can replicate itself on system, does not require human action to spread. Then, the worm replicates and sends itself out to everyone listed in each of the receiver’s address book, and the manifest continues on down the line.ĭue to the copying nature of a worm and its capability to travel across networks the end result in most cases is that the worm consumes too much system memory (or network bandwidth), causing Web servers, network servers and individual computers to stop responding. One example would be for a worm to send a copy of itself to everyone listed in your e-mail address book. The biggest danger with a worm is its capability to replicate itself on your system, so rather than your computer sending out a single worm, it could send out hundreds or thousands of copies of itself, creating a huge devastating effect. A worm takes advantage of file or information transport features on your system, which is what allows it to travel unaided. Worms spread from computer to computer, but unlike a virus, it has the capability to travel without any human action. What Is a Worm?Ī worm is similar to a virus by design and is considered to be a sub-class of a virus. Because a virus is spread by human action people will unknowingly continue the spread of a computer virus by sharing infecting files or sending emails with viruses as attachments in the email.įast Facts: Attaches to an executable file, requires human action to spread. It is important to note that a virus cannot be spread without a human action, (such as running an infected program) to keep it going. Almost all viruses are attached to an executable file, which means the virus may exist on your computer but it actually cannot infect your computer unless you run or open the malicious program. Like a human virus, a computer virus can range in severity: some may cause only mildly annoying effects while others can damage your hardware, software or files. What Is a Computer Virus?Ī computer virus attaches itself to a program or file enabling it to spread from one computer to another, leaving infections as it travels. Viruses, worms and Trojan Horses are all malicious programs that can cause damage to your computer, but there are differences among the three, and knowing those differences can help you better protect your computer from damaging effects. While the words Trojan, worm and virus are often used interchangeably, they are not exactly the same thing. One common mistake that people make when the topic of a computer virus arises is to refer to a worm or Trojan horse as a virus. The phrases are used interchangeably, but they are not the same thing. The most common blunder people make when the topic of a computer virus arises is to refer to a worm or Trojan horse as a virus. ![]()
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