This is an article that provides specific details on .CORE files virus infection as well as a step-by-step removal followed by alternative data recovery approaches.
As identified by security researchers the so-called .CORE files virus is a strain of Matrix ransomware. Once started on a target host it plagues various system settings in order to encrypt valuable files stored on it. The encryption is realized with the help of highly sophisticated encryption technique that combines AES-128 + RSA-2048 cipher algorithms. Upon encryption, all corrupted files remain inaccessible until an efficient recovery solution is employed. The long string of specific extensions [BatHelp@protonmail.com].{random letters and numbers}-{again random letters and numbers}.CORE appears after the original names of encrypted files. According to hackers victims should pay a ransom within 7 days in order to decrypt their .CORE files.

Threat Summary
Name | .CORE files virus |
Type | Ransomware, Cryptovirus |
Short Description | A data locker ransomware that utilizes combination of AES-128 + RSA-2048 cipher algorithms to encrypt valuable files stored on an infected computer. A ransom for specific decryption solution is demanded. |
Symptoms | Important files are locked and renamed with a long string of extensions that is enging with .CORE extension. Files remain unusable until an efficient recovery solution is used to revert back their original code. |
Distribution Method | Spam Emails, Email Attachments |
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 .CORE files virus. |
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. |

.CORE Files Virus – Distribution
The infection code of .CORE files virus is most likely being spread with the help of malspam e-mail campaigns. E-mails used for malicious purposes usually contain one or more of the following components:
- A link that lands on compromised web page set to download and execute the infection file directly on the PC.
- A malicious file attachment masked as a legitimate document and uploaded in a .rar or .zip archive. Such a file could be set to evade detection and this way tricks you into allowing the ransomware to start on your PC.
Along with this spread technique, other methods like malicious exploit kits, fake updates notifications and infected installers of third-party programs may be also used to scam you to allow the infection to plague your computer system.

.CORE Files Virus – Overview
As identified by security researchers the so-called .CORE files virus is a strain of Matrix ransomware which was initially detected in December 2016. As a typical data locker ransomware .CORE primarily aims to corrupt predefined types of files stored on infected PCs. This way hackers become able to blackmail victims into paying a ransom which is not specified at this point.
Before encryption, however, the threat needs to establish all malicious files necessary for the smooth infection process. Once all malicious files are dropped or directly created on the system the ransomware initiates a sequence of system modifications. Mostly the changes are likely to affect some particular registry keys like Run and RunOnce. This could be explained by the fact that these keys manage the automatic execution of all files and objects that are essential for the normal system load each time it is started.
By manipulating their functionalities .CORE files virus files start automatically on each system start which in turn results in the corruption of all newly created files before the last system shut down.
Аt the end of the infection process the ransomware drops a ransom message crafted by hackers who aim to inform victims about the presence of their threat on the system and its devastating impact over valuable data. The message further instructs how the ransom could be paid. The ransom message associated with .CORE ransomware is contained in a rich text format file called #CORE_README#.rtf. Below you could see an image of an opened #CORE_README#.rtf file as well as all the text depicted on it:
HOW TO RECOVER YOUR FILES INSTRUCTION
ATTENTION!!!
We are realy sorry to inform you that ALL YOUR FILES ENCRYPTED by our automatic software. It became possible because of bad server security.
ATTENTION!!!
Please don’t worry, we can help you to RESTORE your server to original state and decrypt all your quickly and safely
INFORMATION!!!
Files are not broken!!!
Files were encrypted with AES-128+RSA-2048 crypto algorithms.
There is no way to decrypt your files without unique decryption key and special software. Your unique decryption key is secretly stored on our server. For our safety, all information about your server and your decryption key will be automatically DELETED AFTER 7 DAYS! You will irrevocably lose all your data!
*Please note that all the attempts to recover your files by yourself or using third-party tools will resul only in irrevocable loss of your data!
*Please note that you can recover files only with your unique decryption key, which started on our side. If you will use the help of third parties, you will only add a middleman.
HOW TO RECOVER FILES???
Please write us to the e-mail (write on English or use professional translator).
You have to send your message on each of our 3 emails:
BatHelp@protonmail.com
BatHelp@tutona.com
BatHelp@india.com
In subject like write your personal ID:
*****************
We recommend you to attach 3 encrypted files to your message. We will demonstrate that we can recover your files.
*Please note that files must not contain any valuable information and their total size must be less than 5Mb.
OUR ADVICE!!!
Please be sure that we will find common language. We will restore all the data and give you recommendations how to configure the protection of your server.
We will definitely reach an agreement ;) !!!
ALTERNATIVE COMMUNICATION
If you did not receive the answer from the aforecited emails for more then 24 hours please send us Bitmessages from a web browser through the webpage https//bitmsg.me. Below is a tutorial on how to send bitmessage via web browser:
1. Open in your browser the link https//bitmsg.me/users/sign_up and make the registration by entering name email and password.
2. You must confirm the registration, return to your email and follow the instructions that were sent to you.
3. Return to site ad click “Login” label or use link ****, enter your email and password and click the “Sign in” button.
4. Click the “Create Random address” button.
5. Click the “New message” button.
6. Sending message:
TO: Enter address: BM-2Cxrwrw5jv5hxbhgu2HUSJrtPf92iKshhm
Subject: Enter your ID: 0D1C44DB09247B05
Message: Describe what you think necessary.
Click the “Send message” button.

.CORE Files Virus – Data Encryption Process
This new strain of Martix ransomware is stated to use a combination of two cipher algorithms – AES-128 + RSA-2048 to corrupt target files. So once the encryption phase occurs the ransomware triggers its built-in sophisticated ciphering module to modify parts of the original files’ code and this way restricts the access to the information they store. It is likely that all of the following types of files will be corrupted by .CORE crypto virus after it gains access to a computer system:
- Audio files
- Video files
- Document files
- Image files
- Backup files
- Banking credentials, etc
Following encryption corrupted files remain inaccessible until an efficient data recovery solution is put into use. They could be all recognized by the distinctive string of extensions appended to their original names:
- [BatHelp@protonmail.com].{random letters and numbers}-{again random letters and numbers}.CORE
The unique decryption key is generated during the encryption process but soon after it transferred to hackers’ controlled server so that you cannot access it without contacting them.

Remove .CORE Files Virus and Restore Data
Below you could find how to remove .CORE files virus step by step. To remove the ransomware manually you need to have a bit of technical experience and ability to recognize traits of malware files. Beware that ransomware is a threat with highly complex code that plagues not only your files but your whole system. So as recommended by security researchers you need to utilize an advanced anti-malware tool for its complete removal. Such a tool will keep your system protected against devastating threats like the discussed ransomware and other kinds of malware that endanger your online security.
After you remove the ransomware make sure to check the “Restore Files” step listed in the guide below. But before you take any further actions, don’t forget to back up all encrypted files to an external drive in order to prevent their irreversible loss.
Step 1: Boot Your PC In Safe Mode to isolate and remove .CORE files virus





Step 2: Uninstall .CORE files virus 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:



Step 3: Clean any registries, created by .CORE files virus 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 .CORE files virus there. This can happen by following the steps underneath:



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 .CORE files virus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 5 (Optional): Try to Restore Files Encrypted by .CORE files virus.
Ransomware infections and .CORE files virus 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.
.CORE files virus FAQ
What is .CORE files virus Ransomware?
.CORE files virus 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 .CORE files virus 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 .CORE files virus?
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 .CORE files virus Ransomware Infect My Computer?
Via several ways..CORE files virus 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 .CORE files virus 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 ..CORE files virus files?
You can't. At this point, the ..CORE files virus files are encrypted. You can only open them once they are decrypted using a specific decryptionkey for the particular algorithm.
What to Do If Ransomware Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your ..CORE files virus files successfully, then do not despair, because this virus is still new.
One way to restore files, encrypted by .CORE files virus 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 "..CORE files virus" Files (Other Methods)?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..CORE files virus 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 .CORE files virus 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 .CORE files virus ransomware and then remove it without causing any additional harm to your important ..CORE files virus files.
Also, keep in mind that viruses like .CORE files virus 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 .CORE files virus 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 .CORE files virus 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 .CORE files virus Research
The content we publish on SensorsTechForum.com, this .CORE files virus 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 .CORE files virus 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.