NailaoLocker is a ransomware-type malware designed to encrypt files and demand a ransom in exchange for their decryption. Written in C++, it has been observed targeting organizations in Europe, including the healthcare sector. Victims’ files are appended with a .locked extension, and a ransom note is created, demanding payment in Bitcoin (BTC) to restore access.
Unlike sophisticated ransomware families, NailaoLocker lacks anti-debugging capabilities and process-stopping features, which can sometimes lead to system inoperability if critical files are encrypted. Additionally, it attempts to exfiltrate information but does not explicitly mention this in its ransom note.
Threat Summary
| Attribute | Details |
|---|---|
| Threat Name | NailaoLocker |
| Threat Type | Ransomware, Crypto Virus, File Locker |
| Encrypted File Extension | .locked |
| Ransom Note File Name | Not explicitly mentioned |
| Associated Email Address | johncollinsy@proton.me |
| Detection Names | Combo Cleaner (Trojan.GenericKD.74047549), ALYac (Trojan.GenericKD.74047549), Arcabit (Trojan.Generic.D469E03D), GData (Trojan.GenericKD.74047549), VIPRE (Trojan.GenericKD.74047549) |
| Symptoms of Infection | Cannot open files; files renamed with .locked extension; ransom note appears; demand for Bitcoin payment |
| Damage | Encrypts all files; threatens deletion if ransom isn’t paid; may lead to system instability |
| Distribution Methods | Exploits vulnerabilities (e.g., CVE-2024-24919 in Check Point VPN), phishing emails, malicious ads, drive-by downloads, trojans, P2P networks |
| Danger Level | High |
How NailaoLocker Ransomware Infects Systems
NailaoLocker has been deployed using various attack vectors, including:
- Exploiting Check Point VPN Vulnerabilities: Security researchers have linked NailaoLocker to the CVE-2024-24919 vulnerability in Check Point VPN software, with ShadowPad malware and PlugX RAT potentially used as initial infection tools.
- Phishing Emails: Malicious email attachments (e.g., macro-enabled Microsoft Office files, PDFs, ZIP/RAR archives) trick users into executing malware.
- Malvertising and Drive-by Downloads: Clicking on fake ads or visiting compromised websites may trigger automatic downloads.
- Peer-to-Peer (P2P) Networks and Pirated Software: Downloading pirated content or software cracks often bundles ransomware payloads.
- Trojan Loaders and Fake Software Updates: Some infections occur when users install what appear to be legitimate updates or software packages.
NailaoLocker Ransom Note Text
Upon encryption, NailaoLocker displays a ransom message stating:
1. Your important files are encrypted. If you want to decrypt your files, please follow the instructions.
\n2. Do you need file decryption service (restore your files to their original state)? If not, your files will be automatically deleted after one week.
\n3. If you need to purchase unlocking service, please contact us and we will tell you the amount (pay with BTC).
\n4. After you complete the payment using BTC, we will deliver the unlocking program within 24 hours. Once the program is run on the locked computer, all files will be unlocked.
\n5. BTC purchase website: hxxps://www.coinbase.com, hxxps://www.bitfinex.com, hxxps://www.binance.com
Contact us on johncollinsy@proton.me
Notice: Do not delete or move locked files without unlocking them first.
Notice: The encryption algorithm uses symmetric encryption, and the password is a string of characters with the same length as the Bitcoin private key. If you can crack Bitcoin, then congratulations, you can decrypt it yourself. Otherwise, please contact us to purchase our decryption tool. Don't have illusions!!!How to Remove NailaoLocker Ransomware
While removing the malware prevents further encryption, it does not restore already encrypted files. Follow these steps:
Step 1: Boot into Safe Mode with Networking
- Restart your computer and press F8 (or Shift + F8) before Windows loads.
- Select Safe Mode with Networking from the Advanced Boot Options menu.
Step 2: Download and Install SpyHunter
- Download the installer from the button bellow.
- Run the setup file and follow the on-screen instructions.
Step 3: Run a Full System Scan
- Open SpyHunter and click on Start Scan.
- Wait for the scan to complete and review the detected threats.
- Click Fix Threats to remove NailaoLocker and associated malware.
Step 4: Restore System Files (If Necessary)
If NailaoLocker encrypted system-critical files, you may need to use:
- Windows System Restore (if available)
- Shadow Volume Copies (if not deleted by the malware)
- Backup files from external storage or cloud
How to Protect Against Future Ransomware Attacks
To prevent infections like NailaoLocker, follow these security best practices:
Regularly Back Up Your Data
- Maintain offline backups on external hard drives.
- Use cloud backups with version history.
Keep Software and OS Updated
- Patch vulnerabilities (e.g., CVE-2024-24919 in Check Point VPN).
- Enable automatic updates for Windows and security software.
Use Robust Antivirus and Anti-Malware Software
- Deploy SpyHunter or another trusted anti-malware tool.
- Regularly scan your system for potential threats.
Be Wary of Suspicious Emails and Links
- Avoid opening email attachments from unknown sources.
- Hover over links to verify authenticity before clicking.
Disable Macros in Microsoft Office Documents
Ransomware often spreads through malicious macro-enabled Office files.
Use Strong, Unique Passwords
Enable multi-factor authentication (MFA) for added security.
Avoid Downloading Pirated Software
Many ransomware infections stem from P2P torrents and software cracks.
Restrict Remote Desktop Protocol (RDP) Access
Disable RDP if unnecessary, or use a strong password and VPN.
Conclusion
NailaoLocker ransomware is a dangerous malware that encrypts files and demands Bitcoin payment. It primarily spreads via exploited vulnerabilities, phishing emails, and trojans. While removing the ransomware prevents further damage, decryption without a backup is usually impossible.
The best way to protect yourself is by regular backups, cybersecurity awareness, and strong anti-malware defenses like SpyHunter. Never pay the ransom, as there is no guarantee of file recovery.
If you are still having trouble, consider contacting remote technical support options.
