Our 3-part article series ends with a detailed description and analysis of TorrentLocker. Jump to the first part dedicated to CryptoWall, and the second part about CTB-Locker.
TorrentLocker Ransomware Resume
TorrentLocker is one of the biggest and most dangerous ransomware families we have seen in action during the last couple of years. TorrentLocker is also known as Win32/Filecoder.DI. It got its name from a blog post by iSIGHT Partners published in the summer of 2014.
Typically, TorrentLocker encrypts the victim’s files via AES-256 encryption algorithm and requests a payment in Bitcoin. Average payment is up to 4.081Bitcoins (approximately US$1500), as reported by researchers at ESET.
Till the end of 2014, the malicious coders behind TorrentLocker have generated about $300,000 from ransom payments. The sum has surely multiplied. Researchers suspect that TorrentLocker is from the same family as Hesperbot banking malware. Targeted countries include Australia, Austria, Canada, Czech Republic, Italy, Ireland, France, Germany, Netherlands, New Zealand, Spain, Turkey, United Kingdom.
The first TorrentLocker attack was registered in Turkey in February 2014. That is when Turkish users received emails from Turkcell (Turkish mobile operato) and were tricked into visiting a fake Turkcell page. Expectedly, the website was crafted to host a malicious document for downloading. Back then, the threat wasn’t identified by name. Later it was dubbed TorrentLocker to differentiate it from the other ransomware attacks. The name originates from the first registry key which had the word ‘Torrent’ in it. Here it is:
HKCU\Software\Bit Torrent Application\
Since the moment it was released in the wild, TorrentLocker has evolved quite a lot. Changes include how the ransom message is presented to the user, as well as alterations in its cryptography methods. However, the distribution method has stayed the same – attackers disguise as local service providers and redirect them to malicious website containing documents to be downloaded. There were also infection cases of malicious Word files which contained bad macros.
TorrentLocker Attack Scenario
Researchers who have closely observed the threat have noticed some peculiar details about it. One thing experts suspect is that the cyber criminals may have had a list of initial victims to start spamming. The list was then extended by the infection process itself.
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How did it happen?
Upon infection, TorrentLocker will harvest any possible email addresses listed in address books from Thunderbird, Outlook and Windows Live Mail. Investigation carried by Fox IT indicates that at least 2.6 million email addresses were harvested by the hacking team.
TorrentLocker pretending to be CryptoLocker
The creators of the ransomware family have been seen to impersonate CryptoLocker and apply its name on the ransom message and the payment website. Many ransomware threats have been pretending to be CryptoLocker.
Read more about the CryptoLocker copycats.
The ‘CryptoLocker’ payment page is hosted on the Tor network. However, the command and control server used for communication with the ransomware from the victim’s PC is not hosted on the Tor network.
TorrentLocker Network Activity
The communication with the command&control server is in HTTPS. Over the C&C server the encryption key is sent along with the number of encrypted files, the ransom message, list of harvested emails and possibly crash logs.
TorrentLocker File-system Activity
Here is a list of all the malicious activities done by the ransomware (apart from locking targeted files):
- The threat can make a copy of itself to a secure location where it will be present upon reboot.
- Display a ransom message with instructions on the payment in Bitcoins only.
- Display a ransom screen with payment information, how to get the needed bitcoins and where to send them. Some of the screens may not have a deadline.
How to stay protected against ransomware attacks?
Finally, we have compiled a list of actions that will descrease the possibility of a ransomware infection:
- Make sure to use additional firewall protection. Downloading a second firewall (like ZoneAlarm, for example) is an excellent solution for any potential intrusions.
- Make sure that your programs have less administrative power over what they read and write on your computer. Make them prompt you admin access before starting.
- Use stronger passwords. Stronger passwords (preferably ones that are not words) are harder to crack by several methods, including brute forcing since it includes pass lists with relevant words.
- Turn off AutoPlay. This protects your computer from malicious executable files on USB sticks or other external memory carriers that are immediately inserted into it.
- Disable File Sharing – it is recommended if you need file sharing between your computer to password protect it to restrict the threat only to yourself if infected.
- Switch off any remote services – this can be devastating for business networks since it can cause a lot of damage on a massive scale.
- If you see a service or a process that is external and not Windows critical and is being exploited by hackers (Like Flash Player) disable it until there is an update that fixes the exploit.
- Make sure always to update the critical security patches for your software and OS.
- Configure your mail server to block out and delete suspicious file attachment containing emails.
- If you have a compromised computer in your network, make sure to isolate immediately it by powering it off and disconnecting it by hand from the network.
- Make sure to educate all of the users on the network never to open suspicious file attachments, show them examples.
- Employ a virus-scanning extension in your browser that will scan all the downloaded files on your computer.
- Turn off any non-needed wireless services, like Infrared ports or Bluetooth – hackers love to use them to exploit devices. In case you use Bluetooth, make sure that you monitor all of the unauthorized devices that prompt you to pair with them and decline and investigate any suspicious ones.
- Employ a virus-scanning extension in your browser that will scan all the downloaded files on your computer.
- Employ a powerful anti-malware solution to protect yourself from any future threats automatically.
Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter
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An inspired writer and content manager who has been with SensorsTechForum since the project started. A professional with 10+ years of experience in creating engaging content. Focused on user privacy and malware development, she strongly believes in a world where cybersecurity plays a central role. If common sense makes no sense, she will be there to take notes. Those notes may later turn into articles! Follow Milena @Milenyim
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- Step 1
- Step 2
- Step 3
- Step 4
- Step 5
Step 1: Scan for with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall 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 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 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: Boot Your PC In Safe Mode to isolate and remove
Step 5: Try to Restore Files Encrypted by .
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
Ransomware infections and 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.
-FAQ
What is Ransomware?
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.
What Does Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does Infect?
Via several ways. 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.
Another way you may become a victim of 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 . files?
You can't without a decryptor. At this point, the . files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your . files successfully, then do not despair, because this virus is still new.
Can I Restore "." Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore . 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 To Get Rid of 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 ransomware and then remove it without causing any additional harm to your important . files.
Can I 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 Stop 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.
Can 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.
Can Ransomware Infect WiFi?
Yes, ransomware can infect 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 use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack 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, Interpol and others 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.
About the Research
The content we publish on SensorsTechForum.com, this 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 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.
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.