Malware
Definition
Malware is malicious software designed to damage computer systems, steal data or gain unauthorised access. The term encompasses viruses, trojans, spyware, ransomware and more.
Malware is an umbrella term for all harmful software programs. Types include viruses (self-replicating), worms (spreading via networks), trojans (hiding behind legitimate software), spyware (monitoring users), adware, rootkits and ransomware.
Malware enters via phishing, malicious downloads, infected USB drives, unpatched vulnerabilities or supply chain attacks. Once installed, malware can steal data, encrypt systems or open backdoors.
Defence consists of endpoint detection (EDR), network segmentation, patch management and 24/7 monitoring by a SOC.