Virus

A Virus is a type of malicious software that attaches itself to legitimate programs or files and replicates when the infected file is executed. Viruses spread from one system to another, often causing harm by corrupting data, disrupting operations, or damaging software and hardware resources.

Viruses require human interaction to propagate, typically through actions like opening infected email attachments, downloading files from untrusted sources, or using infected removable media. Once a Virus infects a system, it can execute its payload, which may include deleting files, stealing data, or slowing down system performance.

The purpose of a Virus is often to disrupt operations, cause damage, or spread quickly across networks. Attackers create Viruses to corrupt data, cause system malfunctions, or enable Backdoor access to infected systems. While some Viruses are created for malicious purposes, others may be designed simply to spread and replicate.

Viruses spread by embedding themselves in executable files or documents. When a user unknowingly executes the infected file, the Virus activates and begins to replicate. Different types of Viruses, such as file infectors, macro Viruses, and boot sector Viruses, spread in unique ways and target specific parts of a system. AntiVirus software and regular updates help to detect and remove Viruses before they cause significant harm.

Examples of Viruses include the Melissa Virus, which spread through email attachments and affected word-processing software, and the ILOVEYOU Virus, which propagated through email and deleted files on infected systems. Another famous example is the MyDoom Virus, which caused widespread disruption and is one of the fastest-spreading Viruses in history.

Viruses pose serious risks, including data corruption, loss of productivity, and potential system downtime. To defend against Viruses, organisations and individuals should implement antiVirus software, keep systems updated, avoid downloading files from untrusted sources, and educate users about safe practices. Regular backups are also essential to recover data in case of a Virus infection.