“Malware” is one of those words everyone uses and few can define precisely. It is the umbrella term for every kind of malicious software — and understanding the main types is the first step to keeping it off your devices and away from your passwords. Our GetMyPassword team explains what malware is, how it spreads, the warning signs of an infection, and how to protect yourself.
What malware is
Malware — short for “malicious software” — is any program written to harm, spy on or take control of a device without your consent. It is the parent category for several familiar threats, each with a different job, but all unwanted and all best kept out in the first place.
The main types
- Viruses and worms spread from file to file or device to device.
- Trojans hide inside software that looks legitimate.
- Spyware and keyloggers quietly record what you do and type, including passwords.
- Ransomware locks your files and demands payment to release them.
How it spreads and how to spot it
Malware usually arrives through email attachments, pirated software, fake downloads and malicious links. Warning signs include a suddenly slow device, pop-up ads, programs you did not install, unexpected battery drain, or friends receiving odd messages from you. Any of these is worth investigating with a scan.
Much malware exists for one reason: to steal your passwords and logins. That is why a device infection can quietly become an account takeover — and why two-factor authentication is such a valuable backstop.
How to protect yourself
Keep your system and apps updated, install software only from official sources, and be wary of unexpected attachments and links. Run reputable security software where appropriate. And limit the damage if something slips through: give every account a unique password from our password generator and enable two-factor authentication, so a stolen password alone cannot unlock your accounts.
Frequently asked questions
What is the difference between a virus and malware?
Malware is the umbrella term for all malicious software. A virus is one specific type that spreads by attaching to files. So every virus is malware, but malware also includes trojans, spyware, ransomware and more.
How do I know if my device has malware?
Common signs are sudden slowness, pop-ups, unknown programs, fast battery drain and strange messages sent from your accounts. Run a reputable security scan and remove anything it flags.
Can malware steal my passwords?
Yes. Spyware and keyloggers are designed to capture what you type, including passwords. That is why unique passwords and two-factor authentication matter, as they limit what an attacker can do with stolen credentials.