Malware, short for “malicious software”, is software designed to infiltrate an IT system in order to cause damage, steal information or allow a cybercriminal to take control of a device. It is a broad term covering several types of cyber threat, including ransomware, viruses, Trojans, spyware and adware.
Malware can infect a computer, server, smartphone or even a connected device. It typically spreads after someone clicks on a fraudulent link, opens a malicious attachment, downloads compromised software or when an attacker exploits an unpatched security vulnerability.
Once installed, malware behaves differently depending on its purpose. Some malware encrypts files in order to demand a ransom, while other forms are designed to spy on users and steal passwords or confidential data. Some allow hackers to take control of a computer remotely, while others slow down systems or create a backdoor for future attacks.
The consequences for a business can be significant: disruption to operations, data loss or theft, financial fraud, system outages and reputational damage. In many cases, a single infection can become the starting point for a much larger cyberattack.
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The best protection against malware relies on a comprehensive approach. It is essential to keep software up to date, use effective detection solutions such as EDR, perform regular backups and raise employees’ awareness of cybersecurity best practices. By combining prevention, monitoring and rapid response, businesses can significantly reduce the risk of malware compromising their IT systems.