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
Download
Malware Removal Tool
|
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.
Gergana Ivanova
Highly motivated writer with 5+ years of experience writing for ransomware, malware, adware, PUPs, and other cybersecurity-related issues. As a writer, I strive to create content that is based on thorough technical research. I find joy in the process of creating articles that are easy to understand, informative, and useful. Follow me on Twitter (@IRGergana) for the latest in the field of computer, mobile, and online security.
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Step 1: Scan for .CORE files virus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
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:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
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:
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 .CORE files virus
Step 5: Try to Restore Files Encrypted by .CORE files virus.
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 .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.
What Does .CORE files virus 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 .CORE files virus Infect?
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.
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 without a decryptor. At this point, the ..CORE files virus 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 ..CORE files virus files successfully, then do not despair, because this virus is still new.
Can I Restore "..CORE files virus" Files?
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 To Get Rid of .CORE files virus 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.
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 .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.
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 .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.
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.