---
title: Jericho's Cybersecurity Glossary | Malvertising
description: Malvertising (malicious advertising) involves injecting malicious code into online advertisements to spread malware or direct users to malicious websites, often without the user’s knowledge.
---

[Jericho Security | Glossary](http://www.jerichosecurity.com/glossary)

# [Jericho's Cybersecurity Glossary | Malvertising](http://www.jerichosecurity.com/glossary/malvertising)

 Written by [Jericho Security Team](http://www.jerichosecurity.com/glossary/author/jericho-security-team) | September 28, 2024

#### *Definition:*

Malvertising (malicious advertising) involves injecting malicious code into online advertisements to spread malware or direct users to malicious websites, often without the user’s knowledge.

#### *Use Cases:*

- Used by attackers to infect websites or display malicious ads on legitimate ad networks, tricking users into clicking malicious content.
- Employed in large-scale attacks to distribute malware or phishing links through online ad platforms.

#### *Related Terms:*

- [Malware](https://www.jerichosecurity.com/glossary/malware)
- [Drive-by Attack](https://www.jerichosecurity.com/glossary/drive-by-attacks)
- Exploit Kit
- [Phishing](https://www.jerichosecurity.com/glossary/phishing)

#### *Questions and Answers:*

- **How does malvertising work?**Attackers inject malicious code into legitimate online advertisements, which can infect a user’s device when they view or click on the ad.
- **What are the risks of malvertising?**Malvertising can lead to malware infections, data theft, or the redirection of users to phishing websites.
- **How can users protect against malvertising?**Users can protect themselves by using ad blockers, keeping browsers and plugins updated, and avoiding suspicious links or ads.

[View full post](http://www.jerichosecurity.com/glossary/malvertising)

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