Understanding malware: A guide for businesses

What is malware?

Malware, short for “malicious software,” is software designed to damage, exploit, or otherwise compromise the information systems of a computer, network, or mobile device — typically with the intent to steal data and sensitive information.

Types of malware

• Viruses — Attach to legitimate software and then replicate when that software is run by inserting harmful code into other programs.
• Worms — Standalone software that replicates and spreads to other computers.
• Trojans — Malicious software that disguises itself as legitimate software and then performs harmful actions.
• Ransomware — Denies a user or organization access to data files or systems until a ransom is paid.
• Spyware — Secretly monitors and collects information then sends to a third party without consent.

How does malware work?

There are several ways malware can infect your company’s systems, but the most typical methods involve exploiting common employee behaviors and software vulnerabilities.

Common infection methods

• Downloading unreliable software from the internet
• Opening email attachments from unknown senders
• Inserting infected removable media, such as discs and drives, into the device
• Using pirated software, movies, or music
• Neglecting to install the latest software updates
• Visiting malicious websites, where malware is installed unknowingly in the background
• Accepting harmful prompts such as pop-up alerts 

How to protect your business from malware

• Educate your employees: Ensure your staff are aware of the risks and signs of malware. Regular training sessions can help them recognize phishing emails, suspicious downloads, and unsafe websites.


• Read all prompts carefully: Teach your employees to read all on-screen prompts thoroughly before clicking any links or installing software.


• Implement anti-malware measures:
  • Install antivirus software.
  • Enable firewalls to act as barriers between your network and potential threats.
  • Regularly update all software including operating systems, browsers, and applications.
  • Regularly back up important data to secure locations to mitigate the impact of potential ransomware attacks.

Be informed. Remain vigilant. Stay secure.

By understanding the nature of malware and implementing robust security measures, you can help protect your business from these harmful cyber threats. Education, vigilance, and proactive defense are your best tools in safeguarding your digital assets.

To learn more about current fraud trends and KeyBank’s commitment to cybersecurity, visit key.com/cybersecurity or contact your Payments Advisor or Relationship Manager.