Malware Removal Steps

Introduction

• The main topic is the process for removing malware from a system.
• Not the best practice for complete malware removal.
• Best practice: Delete everything and reinstall from original media/backup.
• Helpful when there's no access to system or need to retrieve unbacked files.
• After retrieval, delete everything and restore from a known good backup.

Step 1: Recognize Malware

• Identify signs of malware:
  • Unexpected messages on screen.
  • Operating system malfunctions.
  • Messages about viruses or unwanted software.
  • Antivirus warnings.
  • Slow boot or poor performance in applications.
• Research executable if a specific program is suspected.

Step 2: Quarantine the System

• Disconnect from all networks:
  • Unplug wired ethernet connections.
  • Disable wireless networks.
• Isolate removable media:
  • Unplug external storage/USB drives.
  • Prevent use of these media by others.
• Avoid backups or file transfers to prevent spreading malware.

Step 3: Disable System Protection

• Turn off system protection to delete restore points.
  • Malware often infects restore points.
• Deleting restore points prevents using infected system restore.

Step 4: Remediate Phase

• Ensure antivirus is up-to-date:
  • Latest antivirus software and signatures are crucial.
  • Automatic updates recommended.
• Address logistics issue:
  • Malware may block antivirus updates.
  • Use another computer to update and transfer via USB (quarantine afterwards).
• Perform antivirus scan to remove malware.

Additional Remediation Steps

• Use standalone removal apps if necessary.
• Boot in Safe Mode or use PE for system access:
  • Safe Mode: Limited OS version for file transfer.
  • PE: Recovery console via USB/DVD to transfer files.

Post-Removal Check

• Ensure automatic update configuration for antivirus and OS.
  • Task scheduling for manual updates if needed.
  • Check Windows Update settings.

Re-enable System Protection

• After malware removal, re-enable system protection.
• Ensure sufficient drive space for restore points.

User Education

• Educate users to prevent future infections:
  • One-on-one training.
  • Posters/signs with best practices.
  • Message boards and login messages for ongoing updates.
• Document best practices for users to follow in case of malware detection.