Ransomware, called GNL Locker(German-Netherlands Locker) which uses the never seen before AES-512 encryption algorithm has been spotted out in the wild. The dangerous malware encrypts the user files adding a .locked file extension to them. After this, it has been reported to drop several files which are its ransom note, demanding around 200 euros in them. Since the GNL Locker ransomware may spread via a Trojan.Downloader, experts advise users to be extremely careful what they download on their hard drives and what malicious URLs they are clicking on. In case you have been affected by this ransomware, it is strongly recommended to take immediate actions into removing it and restoring your files using alternative methods such as the ones posted after this article.
Threat Summary
| Name | GNL Locker |
| Type | Ransomware |
| Short Description | The ransomware encrypts files and may use the AES-512 cipher. Asks a ransom money of around 200 euros(0.6 BTC) for decryption. |
| Symptoms | Files are encrypted with .locked file extension and become forbidden for access. The ransomware drops a “UNLOCK_FILES_INSTRUCTIONS” ransom note. |
| Distribution Method | Spam Emails, Email Attachments, File Sharing Networks. |
| Detection Tool |
See If Your System Has Been Affected by malware
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Malware Removal Tool
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| User Experience | Join our forum to Discuss GNL Locker Ransomware. |
| Data Recovery Tool | Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive. |
GNL Locker – How Did I Get Infected
To infect user systems, this ransomware is reported by affected users to use a malicious .exe file which is reportedly a Trojan.Downloader types of malware. This threat then downloads a malicious .bat file from one of the C&C (Command and Control) servers of the cyber-criminals. However, so far there is no information on the methods of distribution of the malware and whether it uses attachments or malicious URLs and how is the spam sent out to infect users with GNL Locker.
However, researchers believe that the malicious .exe may pose as an installer of a program posted on suspicious websites. Not only this but it may be featured as an attachment on spammed e-mails that may resemble different legitimate services, for example:
- FedEx.
- eBay.
- PayPal.
- Government branches.
- Banking executives.
- Amazon.
- Services or sites, the user, has registration in.
Users who have not yet been infected should avoid spam messages of the following character or use e-mailing software that has spam blocking features in it and e-mail provider with anti-malware checks.
GNL Locker In Detail
Once GNL Locker has been downloaded onto the computer of the user, the ransomware (also known as crypto-malware) begins to set up for file encryption. For starters, it may drop malicious modules in the following file folders, and those executables, temporary files or DLL’s may have random names, for example:
After it does that, similar to TeslaCrypt ransomware, GNL Locker may modify the registry entries of the infected computer so that it is automatically started when you turn on the infected system and boot Windows:
→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
GNL Locker – The AES Encryption
After doing so, this ransomware may initiate the file encryption procedure. It may either be done via using a combination of AES and RSA encryption ciphers or as the ransomware writers claim in the ransom message, GNL may use the immensely strong AES-512 encoding cipher. Until recently, experts have considered AES-512 to be an algorithm that is simply too big and too long and in many cases obsolete since the size of the key was 512 bit. They have found that AES-256 and 192 keys were sufficient. However, with the recent developments in cryptography the AES-512 has become an even more discussed subject in the cryptography field. As the researcher Adam Caudill believes, the older algorithms may be rendered obsolete soon if a method for their decryption has been discovering (if it already hasn’t been).
So the bottom line is that GNL Locker, in fact, may for the first time use the immensely strong AES-512 key which is quite interesting. But there is also the other version – it may just claim to use it to scare off users into paying the ransom. In fact, user who has paid the actual ransom have stated that they have gotten their files back which is quite suspicious because developing ransomware that uses AES-512 and returning the files 100% healthy may be a bit tricky. For it to work successfully, one must use officially proposed encryption process designs whose code and functionality were tested.
GNL Locker – The Final Stage of Infecting Your PC
Once it has successfully infected your computer, GNL Locker Ransomware changes the name of your encrypted files with the .locked file extension, just like Locky ransomware and it renames the files with random names, just like CryptoWall 4.0 Ransomware, for example:
→ 1298d12g!!.txt.locked
In addition to that GNL drops the ransom note. It consists of two files:
- UNLOCK_FILES_INSTRUCTIONS.html
- UNLOCK_FILES_INSTRUCTIONS.txt
The .txt file aims to notify the user into opening the HTML ransom document, for example:
→ Open UNLOCK_FILES_INSTRUCTIONS.html with your internet browser to see the instructions.
The HTML document itself has the ransom note that demands money to unlock the files:
→ “Your files are locked / encrypted
You can unlock your files by paying requested amount{amount usually around 200 Euros}
All your important files are encrypted using an unique 32 characters AES-512 ({for some variants 256}) password. (it will take a computer over a billion years to crack this password.
Lucky for you it is possible to get all your files back!
In order to unlock your files you will have to purchase the private password for this computer For more information navigate to your personal unlocking page below.
Warning! You must pay the specified amount before {Deadline date} or the amount you have to pay will TRIPLE!
Important information
Your UID: {unique identification number}
Use one of the links below to pay and receive instructions for unlocking your files.
{three tor web links}
If none of the above websites work follow the steps below.
1.Download the Tor Browser Bundle
2.Start the Tor Browser Bundle
3.Enter {tor web link} in the website address bar of the Tor Browser Bundle.”
Not only this but the malware is different to track, because it usually may use different encryption strengths, like AES-256 for some computers and 512 for others, as infected users on BleepingComputer forums have reported.
DNL Locker – Conclusion, Removal, and File Restoration Alternatives
The bottom line is that this is what appears to be a sophisticated ransomware, and it is most likely a part of a RaaS(“ransomware as a service” scheme), because different variants of it exist, demanding different payments and claiming to use different ciphers. This points out that GNL Ransomware may have been sold on deep web black markets.
The best way to get rid of this ransomware is to isolate it in safe mode. This is why we have provided instructions below which you can feel free to follow and hopefully they may help you to get permanently rid of this threat.
If you want to decrypt your files however, we have to note that currently direct decryptor has not been released. This is due to the uniqueness of the keys being used. The only realistic options to get all your files back are to (i)wait for researchers to discover a flaw in the code of the virus itself (we will post an update here) or (ii) try the alternative methods for file restoration (“Restore files encrypted by GNL Locker” below)that may restore even a small portion of your files. They include using Shadow Copies in case you have a backup set up on your Windows device, using File restoration software and the technical option of sniffing out information about the encryption.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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Step 1: Boot Your PC In Safe Mode to isolate and remove GNL Locker
Step 2: Uninstall GNL Locker and related malware from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by GNL Locker on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by GNL Locker there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Scan for GNL Locker with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 5 (Optional): Try to Restore Files Encrypted by GNL Locker.
Ransomware infections and GNL Locker aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
GNL Locker FAQ
What is GNL Locker Ransomware?
GNL Locker is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
Can GNL Locker Ransomware Damage My Computer?
Yes, ransomware can damage your computer. Ransomware is a malicious software that is designed to block access to your computer or files until a ransom is paid. It can encrypt your files and make them inaccessible, preventing you from using your computer or accessing your data. Ransomware can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
Should I Ignore Ransomware, like GNL Locker?
No, you should never ignore ransomware. Ransomware can encrypt your data and block access to your computer, making it impossible to access your files until you pay a ransom. Ignoring ransomware could lead to the permanent loss of your data, as well as the potential for the ransomware to spread to other computers on your network. Additionally, paying the ransom does not guarantee that your data will be recovered. The best way to protect yourself is to invest in robust cyber security measures, such as backup solutions and anti-malware software.
How Does GNL Locker Ransomware Infect My Computer?
Via several ways.GNL Locker Ransomware infects computers by being sent via phishing emails, containing virus attachment.
This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.
Another way you may become a victim of GNL Locker is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open .GNL Locker files?
You can't. At this point, the .GNL Locker files are encrypted. You can only open them once they are decrypted.
What to Do If Ransomware Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your .GNL Locker files successfully, then do not despair, because this virus is still new.
One way to restore files, encrypted by GNL Locker ransomware is to use a decryptor for it. But since it's a new virus, be advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.
Can I Restore ".GNL Locker" Files (Other Methods)?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .GNL Locker files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How Do I Get Rid of GNL Locker Ransomware Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program. It will scan for and locate GNL Locker ransomware and then remove it without causing any additional harm to your important .GNL Locker files.
Also, keep in mind that viruses like GNL Locker ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.
What to Do If I Cannot Recover Ransomware Encrypted Files?
There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:
-Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
-Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
-Also, check if some of the files that were encrypted it can be re-downloaded from the web.
-Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
-You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.
More tips you can find on our forums, where you can also asks any questions about your ransomware problem.
How to Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer. Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Prevent GNL Locker Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files. In addition, it is also important to keep your passwords secure and to avoid visiting websites or downloading applications from untrusted sources. Finally, ensure you have adequate backup and recovery procedures in place to restore your system to its pre-attack state, should a ransomware attack occur.
Can GNL Locker Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it. In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid. This means that if a user is infected with ransomware, their data can be stolen and held for ransom. It is important to be aware of this threat and take precautions to protect yourself and your data.
Can Ransomware Affect WiFi?
Yes, ransomware can affect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even to use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Why Is the Ransom Paid in Crypto?
Cryptocurrency is a secure and untraceable form of payment, making it the ideal choice for ransom payments. It is difficult to trace, and the transactions are almost instantaneous. This means it is nearly impossible for authorities to track the payment and recover the money.
Can Ransomware Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine. It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
What is a File Virus and How Do You Remove it?
A "file virus" (ransomware) is a type of malicious software that infects a computer system and encrypts its files and data, preventing the user from accessing them unless they pay a ransom. The virus is usually spread through malicious links, emails, and downloads from untrusted websites. To remove such a virus, it is best to use professional security software to detect and remove it, as well as to restore any encrypted files. It is also important to practice safe computing by avoiding suspicious links, emails, and downloads, and keeping your computer and software up to date with the latest security patches.
Different Types of File Viruses and How to Understand Them?
File viruses are a type of malicious software that can attach themselves to files, such as documents, spreadsheets, and images, and then spread themselves to other computers. The most common types of file viruses are boot sector, macro, file-infecting (ransomware), and multipartite. Each type of virus has its own set of characteristics and behaviors, which can help users identify them and take the necessary steps to protect their data from infection.
What Steps Should You Take to Protect Your Computer from File Viruses?
To protect your computer from file viruses, the first step is to install up-to-date antivirus software. Make sure you keep the software updated and run regular scans to detect and remove any viruses. Additionally, you should be careful when downloading and opening files from unknown sources. If you receive an email with an attachment, be sure to scan the file before opening it. Finally, you should back up all of your important data regularly in case a virus wipes out your files.
How to Identify and Remove Common File Viruses?
Identifying and removing common file viruses can be a tricky process. The first step is to ensure you have an up-to-date anti-virus program installed on your computer. This will help to identify any malicious software on your system. Once identified, it is important to remove the virus as soon as possible.
To do this, you can use a variety of tools such as anti-virus scanners, malware removal programs and system restore points. It is also important to keep your computer up-to-date with the latest security patches to protect your system from future infections.
How to Diagnose and Treat File Viruses?
Ransomware file viruses are a type of malicious software that can cause serious damage to a computer system. To diagnose and treat a ransomware file virus, you must first identify the type of virus and its source. Once identified, you can then use an antivirus program to scan the system and remove the malicious files. Finally, you should create a backup of your system in case the virus returns and update your system's security settings to prevent future infections.
What is the Most Common File Virus?
The most common ransomware virus is called CryptoLocker. It is a malicious software that encrypts files on a computer and demands a ransom in order to unlock them. It is spread through malicious emails, malicious attachments and links, and other malicious websites. CryptoLocker is considered one of the most dangerous ransomware viruses because it can encrypt important documents and data, making them inaccessible unless the ransom is paid.
What Causes File Viruses and How Can They Be Prevented?
File viruses are malicious software that infect computers and encrypt data until a ransom is paid. These viruses are typically spread through malicious emails, websites, and software downloads. To prevent them, it is important to only download software and documents from trusted sources, keep your operating system and applications up to date, and use a reliable anti-malware program.
How to Repair Corrupted Files Due to File Viruses?
Repairing corrupted files due to file viruses is possible, but it requires the use of specialized file recovery or decryptor software. The first step is to scan the system for malicious files and then use the software to repair any affected files. Additionally, it is important to ensure that the system is regularly updated and scanned for any new threats. Finally, it is important to ensure that the system is regularly backed up so that any lost files can be recovered.
How To Avoid File Viruses When Downloading Files From the Internet?
To protect yourself from file viruses when downloading from the web, firstly, only download files from trusted websites or sources. Additionally, use anti-virus software or firewalls to help protect your system from malicious software. Before downloading a file, always make sure to scan it with an anti-malware program to check for any viruses. It is also important to keep your operating system up to date with the latest security patches. Finally, make sure to backup your important files regularly to ensure you can restore them in the event of a ransomware attack.
About the GNL Locker Research
The content we publish on SensorsTechForum.com, this GNL Locker how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the GNL Locker ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
References
1. How to Recognize Spam Emails with Ransomware
2. How Does Ransomware Encryption Work?
3. How to Decrypt Ransomware Files
4. Ransomware Getting Greedier and Bigger, Attacks Increase by 40%
5. 1 in 5 Americans Victim of Ransomware
Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
- Verify Facebook, LinkedIn and Twitter personal profiles.