Malware

From Encyclopedia of Cybersecurity

Malware

Malware is a broad term used to describe malicious software designed to infiltrate or damage a computer system, network, or device without the user's consent. It encompasses a wide range of harmful programs created by cybercriminals with various objectives, including stealing sensitive information, compromising system integrity, or disrupting normal operations.

Types of Malware

Malware can take many forms, including:

  1. Viruses: Self-replicating programs that attach themselves to other files or programs and spread throughout a computer or network.
  2. Worms: Standalone programs that replicate themselves and spread across networks, often exploiting vulnerabilities in software or network protocols.
  3. Trojans: Malicious programs disguised as legitimate software to trick users into installing them, allowing attackers to gain unauthorized access to the victim's system.
  4. Ransomware: Malware that encrypts files or locks users out of their devices, typically demanding payment in exchange for restoring access.
  5. Spyware: Software that secretly monitors and collects information about a user's activities, such as browsing habits, passwords, or keystrokes.
  6. Adware: Advertising-supported software that displays unwanted advertisements or redirects users to malicious websites.
  7. Rootkits: Stealthy malware designed to conceal its presence on a system and grant attackers persistent access to it.
  8. Botnets: Networks of compromised computers controlled by a single entity, often used to launch coordinated cyber attacks or distribute spam and malware.

Distribution and Prevention

Malware can be distributed through various channels, including malicious email attachments, compromised websites, software vulnerabilities, and removable storage devices. To prevent malware infections, individuals and organizations should:

  • Keep operating systems and software up-to-date with the latest security patches.
  • Use reputable antivirus and anti-malware software to detect and remove malicious programs.
  • Exercise caution when downloading files or clicking on links from unknown or suspicious sources.
  • Avoid opening email attachments or clicking on links from unfamiliar or unexpected senders.
  • Regularly back up important files and data to mitigate the impact of malware infections.
  • Educate users about the risks of malware and train them to recognize common tactics used by cybercriminals.