Chances are, you've heard about malware. It comes across your newsfeed, in meetings with your IT team, and even while talking with a friend who recently got phished.
But what is malware? How can you spot the signs of malware? And why should you even care?
Let's start with the basics ...
What Is Malware?
Malware is malicious code that finds its way onto your computer or network. Its intent is “to destroy data, run destructive or intrusive programs, or otherwise compromise the confidentiality, integrity, or availability of the victim’s data, applications, or operating system” (source).
Breaking that down further, “malicious code” is a hidden way for cybercriminals to sneak into your IT systems.
For example, you’re trying to download a free PDF of a popular business book (Good to Great, anyone?). You type the title into Google and click on a link that promises a free copy.
It looks legit enough, so you download the file and open it.
But instead of the book, you’ve just opened a file containing malware—programmed to quietly scan your system for confidential info, including credentials (i.e., usernames and passwords).
Signs of Malware
Malware can infect your systems through various paths.
In the PDF example above, cybercriminals (also called bad actors) set up high-ranking, legitimate-looking websites to offer counterfeit downloads.
Malware can also be found as email attachments or links, and on removable media (e.g., USB drives).
So before you click on a link in an email or a download on a website, you need to be sure exactly what you’re clicking—who it’s from and where it leads.
One question we often encounter is, “What’s the point of malware?”
Malware is used by cybercriminals for all sorts of reasons, but according to Verizon’s “DBIR: 2025 Data Breach Investigations Report,” the top motivating factor for malware attacks is money, with espionage quickly gaining ground (from 1% in 2024 to 16% in 2025) (source).
A second question is, “What are the signs of malware?”
Malware infections in a single computer cause chaos. You might see:
- pop-up windows, even when you’re not online
- system crashes, slow-downs, or erratic behavior
- an inability to restart or shutdown your computer
System-wide malware might look like:
- Unusual network traffic or bandwidth spikes: A sudden surge in outbound traffic, especially outside business hours.
- Unauthorized access attempts or locked accounts: Repeated login failures or unexpected account lockouts.
- Disabled antivirus or security tools: Some malware tries to deactivate protection to avoid detection.
- Missing, encrypted, or renamed files: Ransomware often leaves files encrypted or with strange extensions.
- Unusual email activity from employee accounts: Accounts being used to send mass emails can be a sign of compromise.
- Alerts from monitoring tools (that were ignored): If you have endpoint or SIEM alerts, but they’re routinely dismissed, something might be slipping through.
How to Protect Your Company from Malware
The best time to deal with malware? Before it ever hits your systems.
Malware thrives on gaps—in your defenses, your team’s awareness, and your monitoring tools.
Building resilience means closing those gaps before attackers exploit them.
Invest in strong endpoint protection and regular patching. Monitor for unusual behavior across devices and networks. Train your team to spot the subtle signs. Sometimes, the smallest glitch is your only clue.
Most importantly? Make cybersecurity part of how your business thinks, plans, and leads. Malware may start with a rogue download, but the real impact hits your operations, customers, and brand.
Need clarity, next steps, or just a gut check? WYRE always helps!