A zombie is a computer virus that penetrates a system through the Internet. When it gains access to a computer system it can control it and make it do things. Some people refer to it as a zombie virus.
The zombie uses the target computer to launch infected and malicious data. This data is sent to other computers, which end up doing the same, i.e., sending infected data to other systems.
BusinessDictionary.com has the following definition of the term:
“Type of computer virus that gains access to a system via internet and then takes over its resources.”
“Zombie then uses the victim computer as a launch platform for sending infected data to other computers, thus hiding the identity of its original perpetrator.”
Zombie may refer to a compromised computer
Adapted from a Wikipedia image.
In computing jargon, the word zombie may also refer to a compromised computer that is connected to the Internet. A hacker, trojan horse program, or virus has compromised it. It is typically used to carry out malicious tasks remotely.
A hacker is somebody who gains access to a computer system by breaking its password code. They gain access without permission.
Hackers often use a network of compromised computers – zombie computers – to launch DOS attacks and spread email spam. We refer to a network of interconnected computers as a ‘botnet.’ DOS stands for denial-of-service, i.e., a cyber-attack which overloads a computer or network resource, making it unavailable. DOS attacks, for example, make websites crash by flooding them with visitors.
Zombie computer owners do not usually know that their devices are infected.
Wikipedia writes the following regarding zombie computers:
“Because the owner tends to be unaware, these computers are metaphorically compared to fictional zombies. A coordinated DDoS attack by multiple botnet machines also resembles a ‘zombie horde attack,’ as depicted in fictional zombie films.”
Etymology of zombie
Etymology is the study of the origin of words and how their meanings changed and evolved over time.
According to Etymonline.com, the term ‘zombie’ first appeared in the English language in 1871. It came from West Africa. It was initially the name of a snake god. In voodoo cult, it acquired the meaning of ‘reanimated corpse.’
It was not until the turn of this century that we started using the term for compromised computers and computer viruses, trojan horses, etc.