Malvertising, short for malicious advertising, refers to the practice of using online advertising networks to spread malware and scam legitimate internet users. It occurs when cybercriminals inject malicious code into legitimate advertising networks. These attacks can appear on trusted websites that display third-party advertisements.
How malvertising works
Cybercriminals purchase ad spots through legitimate advertising networks. They initially submit clean ads that pass security checks. Later, they swap these ads with malicious versions. The malicious ads can automatically download malware or redirect users to scam websites.
The impact on advertisers
Malvertising creates several problems for legitimate advertisers. It generates fake clicks and IVT that waste advertising budgets. It damages brand safety when users associate malicious ads with legitimate businesses. The practice also reduces trust in online advertising platforms.
Common types of malvertising attacks
- Drive-by downloads that automatically install malware
- Redirect attacks that send users to phishing sites
- Scam ads that promote fake products or services
- Pop-up ads that use scare tactics to trick users
- Crypto-mining scripts that hijack computer resources
How to protect against malvertising
Advertisers need multiple layers of protection against malvertising. Using reputable ad networks with strong security measures is essential. Regular monitoring of ad campaigns can help detect suspicious activity.
Implementation of ad verification tools helps identify malicious advertisements. These tools scan for known malware signatures and suspicious behavior patterns. They can block problematic ads before they reach users.
The connection to click fraud
Malvertising often works hand-in-hand with click fraud schemes. Malicious ads can generate fake clicks through automated bots. They may also redirect real users to generate fraudulent impressions. This artificial traffic inflates advertising costs while providing no real value to advertisers.
The growing threat
The sophistication of malvertising attacks continues to increase. Cybercriminals now use advanced techniques to evade detection. They exploit vulnerabilities in advertising networks and website security. This makes it crucial for advertisers to stay informed and maintain strong security measures.
