Description: Malicious network traffic refers to any type of communication on a network that intends to cause harm, exploit vulnerabilities, or compromise the security of computer systems. This traffic can manifest in various forms, including malware, denial-of-service (DDoS) attacks, phishing, and other intrusion techniques. The main characteristics of malicious traffic include concealing its true nature, using social engineering techniques to deceive users, and the ability to spread rapidly through vulnerable networks. The relevance of this type of traffic lies in its potential to cause significant economic losses, compromise sensitive data, and affect the reputation of organizations. With the rise of digitalization and the interconnection of devices, malicious network traffic has become one of the primary concerns for cybersecurity professionals, who must implement effective defense measures to detect and mitigate these threats.
History: Malicious network traffic has existed since the early days of computer networks, but its evolution has been notable since the 1980s. One of the first computer viruses, ‘Brain’, appeared in 1986, marking the beginning of an era where malware began to spread through networks. As the Internet expanded in the 1990s, so did attack techniques, with the emergence of worms like the ‘Morris Worm’ in 1988. In the 2000s, malicious traffic diversified with the rise of phishing and ransomware, leading to a more sophisticated approach to cybersecurity.
Uses: Malicious network traffic is primarily used in cyberattacks to compromise systems, steal sensitive information, or disrupt services. Attackers may employ this traffic to infiltrate networks, conduct espionage, or extort organizations through ransomware. Additionally, malicious traffic can be used to propagate malware across networks, affecting multiple devices and systems in a short period.
Examples: An example of malicious network traffic is the WannaCry ransomware attack, which in 2017 affected thousands of organizations worldwide, encrypting data and demanding a ransom. Another case is the use of botnets, such as Mirai, which was used to carry out massive DDoS attacks, affecting the availability of online services. Additionally, phishing has become a common technique for stealing access credentials, where attackers send fraudulent emails that appear legitimate.
