Network and System Issues Related to Malware

Symptoms of Malware Infection

• Slow network access and system hang-ups.
• Difficulty performing normal operations.
• Prevents downloading malware removal tools and latest security patches.

Dealing with Malware

• Use malware removal tools if data recovery is needed.
• Best Practice: Delete everything and start with a fresh configuration.

Browser-based Malware Tricks

• Push Notifications: Sites may send fake notifications indicating antivirus is out of date.
  • Often, these are attempts to trick users into downloading malware.
• Browser Settings: Configure security settings to block all notifications except from trusted sites.

False Antivirus Alerts

• Appear as pop-ups or alerts in browsers.
• May ask for resubscription or claim the system is locked.
• Use third-party malware removal tools or reinstall the operating system.

Signs of File and Permission Issues

• Modified Windows OS files.
• Missing documents and altered file permissions.
• Indicates possible active malware.
  • Solution: Delete everything and restore from a backup.

Certificate Errors in Browsers

• May indicate an unsafe site or a non-private connection.
• Investigate certificate details for domain name and trusted CAs.
• Check computer’s date and time settings to resolve potential errors.

Browser Redirection

• Redirection to non-Google search engines could indicate malware.
• Often results in more malware exposure or unwanted ads.
• Best Solution: Reinstall the operating system or restore from a known good backup.