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How Malware Spreads
How Malware Spreads The common ways malware gets onto a computer. Phishing links and attachments. Drive-by downloads from shady websites. USB sticks with a disguised file. Supply-chain (a trusted update is poisoned). Defence: email filtering, blocking macros, EDR on each machine, and user awareness.
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What this card says
What it is
The common ways malware gets onto a computer.
Main routes
Phishing links and attachments.
Drive-by downloads from shady websites.
USB sticks with a disguised file.
Supply-chain (a trusted update is poisoned).
Why it matters for security
Defence: email filtering, blocking macros, EDR on each machine, and user awareness.
Most malware starts with a human click.
| Red team (attacker) does | Blue team (defender)… |
|---|---|
| Sends invoice-themed phishing with macro or link | Email filtering, attachment sandbox, disable macros by… |
| Leaves infected USB in parking (classic bait) | Disable autorun; USB allowlisting / control; endpoint… |
| Trojans cracked software on file-share sites | Block unknown publishers; company software portal only;… |
Learn more in the lesson: 39.2 How Malware Spreads