What is Malvertising?
Malvertising (malicious advertising) is a cyberattack method where hackers inject malware into online ads. These ads can appear on trusted websites, infecting your device even if you don’t click on them.
How Does Malvertising Work?
- Hackers buy ad space on ad networks.
- They embed malware into ads.
- The ads appear on trusted websites (news, social media, blogs).
- If your system has vulnerabilities, malware is installed automatically (drive-by download).
For a more detailed explanation, check out Google’s Security Blog.
Signs Your System is Attacked by Malvertising
1. Strange Browser Behavior
- Frequent pop-ups and unwanted redirects
- Your homepage or search engine changes unexpectedly
- Suspicious browser extensions appear
2. Slow Performance & Crashes
- Websites take too long to load
- Apps or system freeze often
- High CPU usage without running heavy programs
3. Fake Security Warnings
- Pop-ups say: “Your PC is infected! Click here to fix.”
- Ransomware messages demand payment to unlock files
If you see these signs, follow this Cybersecurity Guide by Norton for immediate action.
How to Protect Yourself from Malvertising
✅ Use an Ad Blocker – Install uBlock Origin or AdGuard
✅ Keep Software Updated – Update your browser, OS, antivirus
✅ Avoid Suspicious Ads – Never click on “free prizes” or “urgent security alerts”
✅ Scan for Malware – Use Malwarebytes or Windows Defender
What to Do If You’re Infected?
- Disconnect from Wi-Fi immediately
- Run a full system scan with Malwarebytes Free Scanner
- Uninstall unknown programs from your device
- Reset your browser settings (Google Chrome Reset Guide)
Final Thoughts
Malvertising is a growing cybersecurity threat, but you can stay safe with the right precautions. Keep your software updated, avoid sketchy ads, and use strong security tools.
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