This article provides information about a version of Scarab data locker ransomware dubbed Rebus. The threat encrypts important files and demands a ransom payment. By reaching the end of the article, you will know how to remove the threat and how to restore .REBUS files.
Rebus is a newly detected ransomware that belongs to the Scarab family. It is classified as data locker ransomware due to its main purpose to locate target files and encode them. Corrupted data can be recognized by the specific extension .REBUS that stands at the end of their names. Hackers behind Rebus ransomware demand a ransom for the decryption of .REBUS files.
Threat Summary
| Name | Rebus |
| Type | Ransomware, Cryptovirus |
| Short Description | A data locker ransomware that utilizes AES cihper algorithm to encrypt target files stored on the infected computer. Then it demands a ransom for a specific decryption solution. |
| Symptoms | Important files are locked and renamed with .REBUS extension. The access to the information they store remains restricted until a ransom is paid. |
| 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 Rebus. |
| 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. |
Rebus Ransomware – Distribution
An infection with Rebus ransomware could be triggered by a malicious payload that sneaks into computer systems with the help of various shady techniques of distribution. Preferred by hackers are the email spam campaigns. Crafted emails often attempt to trick users into installing the ransomware directly on their PCs. The malicious components parts of such emails usually are various kinds of file attachments and/or in-text links. To make users more prone to open an attached file or visit a corrupted web page, hackers impersonate representatives of well-known companies or even governmental institutions. In case of interaction with any of the malicious components the ransomware gains access to the system and starts the infection process.
Next time when you need to open a dubious file on your PC you can use a free online extractor to identify whether the file contains malicious elements or not. Once you have this information you could easily prevent severe malware infections like Rebus ransomware from infecting your system.
Rebus (Scarab) Ransomware – Overview
Once Rebus ransomware payload is running on the system it initiates a sequence of changes that affect various system settings. At first, it could create additional malicious files and locate some of them in the following folders:
- %AppData%
- %Local%
- %LocalLow%
- %Roaming%
- %Temp%
- %Windows%
As the payload may not contain the commands that will lead the infection to its very end, Rebus may contact its command and control server to drop more needed files and objects. It is likely that some of them are self-destroying so at the end of the attack, only part of all malware files may remain on the system.
The remaining files could be used by hackers to establish a connection with the infected PC and monitor the activities performed on it. Furthermore, they could unnoticeably install another malware and record all keystrokes, steal sensitive credentials or use system resources to mine for any cryptocurrency.
A specific trait of Rebus ransomware is its ransom note that it displays on the PC screen. The note is contained in a file called REBUS RECOVERY INFORMATION.TXT and that is reads is:
=======================================================================================================================
YOUR FILES ARE ENCRYPTED!
Your personal ID
[redacted hex]Your documents, photos, databases, save games and other important data was encrypted.
Data recovery the necessary decryption tool. To get the decryption tool, should send an email to:
rebushelp@airmail.cc or rebushelp@protonmail.com
If you dont get reply in 24 hours use jabber:
rebushelper@exploit.im
Letter must include Your personal ID (see the beginning of this document).
In the proof we have decryption tool, you can send us 1 file for test decryption.
Next, you need to pay for the decryption tool.
In response letter You will receive the address of Bitcoin wallet which you need to perform the transfer of funds.
If you have no bitcoins
* Create Bitcoin purse: https://blockchain.info
* Buy Bitcoin in the convenient way
https://localbitcoins.com/ (Visa/MasterCard)
https://www.buybitcoinworldwide.com/ (Visa/MasterCard)
https://en.wikipedia.org/wiki/Bitcoin (the instruction for beginners)
– It doesn’t make sense to complain of us and to arrange a hysterics.
– Complaints having blocked e-mail, you deprive a possibility of the others, to decipher the computers.
Other people at whom computers are also ciphered you deprive of the ONLY hope to decipher. FOREVER.– Just contact with us, we will stipulate conditions of interpretation of files and available payment,
in a friendly situation
– When money transfer is confirmed, You will receive the decrypter file for Your computer.Attention!
* Do not attempt to remove a program or run the anti-virus tools
* Attempts to decrypt the files will lead to loss of Your data
* Decoders other users is incompatible with Your data, as each user unique encryption key=======================================================================================================================
Negotiations and contacts with hackers should be avoided as they can try to scam you and make you a victim of their malicious intentions for the second time.
Rebus Ransomware – Encryption Process
All initial system modifications are made to support the completion of Rebus’s main purpose which is encryption of target files. For the encryption Rebus is known to utilize the strong AES cipher. This cipher changes completely the original code of predefined types of files including:
- Audio files
- Video files
- Document files
- Image files
- Backup files
- Banking credentials, etc
After encryption, all corrupted files have completely changed names that end with the extension .REBUS. The access to the information stored by .REBUS files is restricted as hackers demand a ransom payment for the specific decryption key. The ransomware generates this key during the encryption process. Unfortunately, immediately after this event, the key is transferred to criminals’ host.
Beware that there is no guarantee that the Rebus ransomware has code that enables it to generate working decryption keys. This means that the key possessed by hackers could be broken and unable to decrypt your .REBUS files. So don’t rush into transferring them the ransom before you try to resolve the problem with the help of alternative solutions.
Remove Rebus Ransomware Ransomware and Restore .REBUS Files
The removal of this Scarab ransomware version named Rebus demands a bit of technical experience and ability to recognize characteristics of malware files. And there is no doubt that you should remove this nasty threat from the infected PC as soon as you detect it. Below you could find how to do it step by step. Beware the ransomware is a highly complex threat that is designed to plague your whole system and not only your files. That’s why security researchers recommend the use of an advanced anti-malware tool for its removal. Such tool will keep your system protected against devastating threats like Rebus as well as all other kinds of malware in future.
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 Rebus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall Rebus 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 Rebus 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 Rebus 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 Rebus
Step 5: Try to Restore Files Encrypted by Rebus.
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 Rebus 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.
Rebus-FAQ
What is Rebus Ransomware?
Rebus 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 Rebus 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 Rebus Infect?
Via several ways.Rebus 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 Rebus 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 .Rebus files?
You can't without a decryptor. At this point, the .Rebus 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 .Rebus files successfully, then do not despair, because this virus is still new.
Can I Restore ".Rebus" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Rebus 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 Rebus 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 Rebus ransomware and then remove it without causing any additional harm to your important .Rebus 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 Rebus 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 Rebus Research
The content we publish on SensorsTechForum.com, this Rebus 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 Rebus 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.
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