Malware

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Malware, short for malicious software, refers to programs designed with harmful intentions for your computador[1] system. This includes a wide range of harmful software, like viruses, worms, rootkits, backdoors, and ransomware. These programs can spread via emails, infected files, or even specific security[2] gaps in your network. Malware is a serious threat because it can steal personal, financial, or business information, and can severely harm system performance. To fight malware, we use antivirus software that scans for suspicious code or behavior. However, it’s not foolproof. To boost your protection against malware, it’s crucial to regularly update your software, educate yourself about online safety, and backup your data regularly. Malware, while harmful, can be managed with the right strategies and tools.

Definições de termos
1. computador. Um computador é um dispositivo sofisticado que manipula dados ou informações de acordo com um conjunto de instruções, conhecidas como programas. Por conceção, os computadores podem executar uma vasta gama de tarefas, desde simples cálculos aritméticos até ao processamento e análise de dados complexos. Os computadores evoluíram ao longo dos anos, desde as primitivas ferramentas de contagem, como o ábaco, até às modernas máquinas digitais. O coração de um computador é a sua unidade central de processamento (CPU), que inclui uma unidade lógica aritmética (ALU) para efetuar operações matemáticas e registos para armazenar dados. Os computadores também têm unidades de memória, como ROM e RAM, para armazenar informação. Outros componentes incluem dispositivos de entrada/saída (E/S) que permitem a interação com a máquina e circuitos integrados que melhoram a funcionalidade do computador. As principais inovações históricas, como a invenção do primeiro computador programável por Charles Babbage e o desenvolvimento do primeiro computador eletrónico digital automático, o Atanasoff-Berry Computer (ABC), contribuíram grandemente para a sua evolução. Atualmente, os computadores alimentam a Internet, ligando milhares de milhões de utilizadores em todo o mundo, e tornaram-se uma ferramenta essencial em quase todas as indústrias.
2. security. Security, as a term, originates from the Latin 'securus,' meaning free from worry. It is a concept that refers to the state of being protected from potential harm or threats. This protection can apply to a wide range of referents, including individuals, groups, institutions, or even ecosystems. Security is closely linked with the environment of the referent and can be influenced by different factors that can make it either beneficial or hostile. Various methods can be employed to ensure security, including protective and warning systems, diplomacy, and policy implementation. The effectiveness of these security measures can vary, and perceptions of security can differ widely. Important security concepts include access control, assurance, authorization, cipher, and countermeasures. The United Nations also plays a significant role in global security, focusing on areas like soil health and food security.
Malware (Wikipédia)

Malware (a portmanteau for malicious software) is any software intentionally designed to cause disruption to a computador, servidor, client, ou rede informática, leak private information, gain unauthorized access to information or systems, deprive access to information, or which unknowingly interferes with the user's computer security e privacidade. Researchers tend to classify malware into one or more sub-types (i.e. computer viruses, worms, Trojan horses, ransomware, spyware, adware, rogue software, wiper e keyloggers).

Malware poses serious problems to individuals and businesses on the Internet. According to Symantec's 2018 Internet Security Threat Report (ISTR), malware variants number has increased to 669,947,865 in 2017, which is twice as many malware variants as in 2016. Cybercrime, which includes malware attacks as well as other crimes committed by computer, was predicted to cost the world economy US$6 trillion in 2021, and is increasing at a rate of 15% per year. Since 2021, malware has been designed to target computer systems that run critical infrastructure such as the electricity distribution network.

The defense strategies against malware differ according to the type of malware but most can be thwarted by installing antivirus software, firewalls, applying regular patches, securing networks from intrusion, having regular backups e isolating infected systems. Malware can be designed to evade antivirus software detection algorithms.

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