Ransomware is one of the most devastating forms of malware, designed to encrypt your personal files and demand payment for the decryption key. If you find your files appended with strange extensions like .charlie, .locky, or .crypt, your system has been compromised. Follow this guide to isolate the infection, remove the malware, and attempt to recover your data without paying the attackers.

Step 1: Isolate the Infected System Immediately

Ransomware often tries to spread to other devices on the same network or encrypt cloud-synced folders. To stop the spread, you must disconnect your PC from the internet by unplugging the Ethernet cable or turning off Wi-Fi. Additionally, unplug any external hard drives, USB sticks, or NAS devices connected to the computer to prevent the malware from reaching your backups.

Step 2: Identify the Ransomware Strain

Before you can attempt recovery, you need to know which ransomware variant you are dealing with. Look for a ransom note (usually a .txt or .html file on your desktop). To identify the strain officially:

• Visit the ID Ransomware website or the No More Ransom Project.
• Upload the ransom note or an encrypted file sample.
• These tools will identify the malware and tell you if a free decryption tool is available.

Step 3: Boot into Safe Mode and Remove the Malware

To ensure the ransomware doesn't re-encrypt files while you work, you must remove the underlying infection. Boot your PC into Safe Mode with Networking by holding the Shift key while clicking Restart. Once in Safe Mode:

• Run a full system scan using Windows Defender Offline or a reputable third-party scanner like Malwarebytes Premium.
• Ensure the antivirus software is updated to the latest definitions before scanning.
• Delete or quarantine all detected threats immediately.

Step 4: Attempt to Restore Files Using Shadow Copies

If the ransomware did not delete your Volume Shadow Copies, you might be able to restore older versions of your files. Use a tool like ShadowExplorer to browse through previous point-in-time snapshots of your folders. Right-click the folder you need and select Export to save the unencrypted versions to an external drive.

Step 5: Use Official Decryption Tools

If you identified your ransomware strain in Step 2, check the No More Ransom website for a specific decryptor. Organizations like Kaspersky, Emsisoft, and Avast frequently release free tools that can break the encryption of known ransomware variants. Never pay the ransom, as there is no guarantee you will get your files back, and it encourages future attacks.

Step 6: Restore from a Clean Backup

The most reliable way to recover is to wipe your hard drive and reinstall Windows, then restore your files from an offline backup. Before restoring, ensure your backup drive was not connected during the attack. Always follow the 3-2-1 backup rule: keep 3 copies of your data, on 2 different media types, with 1 copy stored offline or offsite.

How to Prevent Future Ransomware Attacks

To stay protected, always keep your operating system and software updated to patch vulnerabilities. Enable Controlled Folder Access in Windows Security to prevent unauthorized apps from modifying your files, and be extremely cautious of email attachments from unknown senders, as phishing is the #1 delivery method for ransomware.

💡 Pro Tip: Keep your software updated to avoid these issues in the future.