What is malicious code?

Malicious code, also known as malware, encompasses various types of software designed to infiltrate and damage computer systems, networks, or devices without the owner's consent. Common types include viruses (which replicate and spread by attaching to other files), worms (which self-replicate and spread across networks), Trojans (which disguise themselves as legitimate software), ransomware (which encrypts files and demands a ransom for their release), spyware (which collects user information without their knowledge), and adware (which displays unwanted advertisements). Malicious code is commonly used to steal sensitive data, disrupt operations, gain unauthorized access, or extort money.