Robbinhood Ransomware

Also Known As: Robbinhood virus
Distribution: Low
Damage level: Severe

Robbinhood ransomware removal instructions

What is Robbinhood?

Ransomware-type programs are computer infections that cyber criminals use to prevent people from accessing their files and to blackmail them by making ransom demands. Robbinhood was discovered by Michael Gillespie and is an example of one of these programs. It encrypts data stored on the system, rendering files unusable. To regain access to their files, people are encouraged to purchase a specific decryption tool. Robbinhood renames each encrypted file with the following format: "Encrypted_random.enc_robbinhood" (the word "random" is replaced with a string of random numbers and characters). For example, "1.jpg" might be renamed to a filename such as "Encrypted_1y5u5msd65321fd2.enc_robbinhood", and so on. This program creates an HTML file ("_Decryption_ReadMe.html") containing a ransom message, which provides instructions about how to make payment and receive a decryption tool.

As mentioned, the "_Decryption_ReadMe.html" HTML file contains instructions about how to contact cyber criminals, make payment, and so on. It states that Robbinhood encrypted files with the RSA-4096 cryptography algorithm. To acquire a decryption tool (key), ransomware victims must pay 0.8 or 13 Bitcoins using a Bitcoin wallet address presented in the HTML file. The cost depends on the number of infected systems. It goes on to state that the cost is increased by $10,000 for each day following the fourth day since encryption. Therefore, people are encouraged to make payment in no less than four days after encryption. There are three email addresses provided to make contact with the cyber criminals who developed Robbinhood. There is also an alternative method using a contact form that can be accessed through a Tor browser. People who have their data encrypted by Robbinhood are offered free decryption of three files (no larger than 10 MB in total) as 'proof' that these cyber criminals have a decryption tool/key, however, they promise to send it only when their ransom demands are met. Unfortunately, no cyber criminals (ransomware developers) can be trusted. In many cases, people are scammed: they pay for decryption tools/keys and receive nothing in return. Therefore, cyber criminals often start to ignore victims once their demands are met. In most cases, only the ransomware developers have decryption tools/keys. Ransomware-type programs encrypt data with cryptography algorithms that make decryption without the involvement of cyber criminals impossible. The only way to restore files without paying is to use a data backup that was created before encryption.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Robbinhood decrypt instructions

There are many ransomware-type programs online (such as CMG, L1LL, and Prus). Most encrypt data and encourage victims to pay ransoms. Essential differences between these programs are usually cost of decryption and cryptography algorithm used to encrypt data. Decryption without contacting cyber criminals is usually impossible, unless the program contains bugs/flaws or is not fully developed. Therefore, we recommend that you generate regular data backups and store them on remote servers or storage devices that are not connected to your system (otherwise, ransomware-type programs are capable of encrypting backups together with other data stored on the computer).

How did ransomware infect my computer?

It is unknown exactly how Robbinhood developers distribute/proliferate this infection, however, most cyber criminals use similar methods. A common method is to send emails that contain malicious attachments. Typically, attached files are Microsoft Office documents, PDFs, JavaScript files, archives such as ZIP, RAR and .exe files (executables). The main purpose of these spam email campaigns is to trick people into opening the attached file, which then downloads and installs ransomware or another high-risk computer infection. Another way to proliferate malicious files and cause computer infections is through dubious software download sources such as Peer-to-Peer networks (eMule, torrent clients, and so on), free file hosting, freeware download and unofficial websites, third party downloaders, and other sources of this type. Cyber criminals present their infected files as legitimate, however, once they are downloaded and opened/installed, they cause computer infections such as ransomware. If a Trojan programs is installed, this might be the reason for computer infection with ransomware-type programs. When installed, trojans proliferate other viruses. Various unofficial/fake software updaters can be used to proliferate ransomware. They cause computer infections by downloading and installing malicious programs rather than updates or fixes, or they exploit bugs/flaws of outdated software on the system. Various software 'cracking' tools operate in a similar manner: rather than activating operating systems or programs free of charge, they download and install viruses.

Threat Summary:
Name Robbinhood virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension "Encrypted_random.enc_robbinhood" filename (the word "random" is replaced with a string of random numbers and characters)
Ransom Demanding Message _Decryption_ReadMe.html file
Ransom Amount 0.8 - 13 Bitcoins (the price increases by $10,000 every day).
Detection Names Avast (Win32:Trojan-gen), BitDefender (Trojan.GenericKD.31919436), ESET-NOD32 (Win32/Filecoder.RobbinHood.A), Kaspersky (Trojan-Ransom.Win32.Robin.a), Full List Of Detections (VirusTotal)
Symptoms Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection.
Removal

To eliminate Robbinhood virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

To avoid computer infection with ransomware-type and other high-risk infections, take the following precautions. If a received email contains an attachment and is sent from an unknown, untrustworthy, or suspicious email address, do not open the attachment or website link without making sure it is safe to do so. These emails are often irrelevant, although they are presented as important and official. Keep installed programs updated, however, use only implemented functions or tools provided by official developers. Do not download software from untrustworthy/unofficial websites, using third party downloaders, or the other dubious sources mentioned above. Use official, reputable websites and direct links. Do not activate installed software using third party tools ('cracks'), since this is a cyber crime. Furthermore, these tools cause computer infections. Keep your computer safe by having reputable anti-spyware or anti-virus software installed. If your computer is already infected with Robbinhood, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Screenshots of "_Decryption_ReadMe.html" HTML file:

robbinhood ransomware html file 1 robbinhood ransomware html file 2 robbinhood ransomware html file 3

Text presented in Robbinhood ransomware HTML file:

What happened to your files?
All your files are encrypted with RSA-4096, Read more on https://en.wikipedia.org/wiki/RSA_(cryptosystem)
RSA is an algorithm used by modern computers to encrypt and decrypt the data. RSA is an asymmetric cryptographic algorithm. Asymmetric means that there are two different keys. This is also called public key cryptography, because one of the keys can be given to anyone:
1 - We encrypted your files with our "Public key"
2 - You can decrypt, the encrypted files with specific "Private key" and your private key is in our hands ( It's not possible to recover your files without our private key )
Is it possible to get back your data?
Yes, We have a decrypter with all your private keys. We have two options to get all your data back.
Follow the instructions to get all your data back:
OPTION 1
Step 1 : You must send us 0.8 Bitcoin(s) for each affected system
Step 2 : Inform us in panel with hostname(s) of the system you want, wait for confirmation and get your decrypter
OPTION 2
Step 1 : You must send us 13 Bitcoin(s) for all affected system
Step 2 : Inform us in panel, wait for confirmation and get all your decrypters
Our Bitcoin address is: 132wg6kkJJ4MpNKnuhVoptYPmYHf6C5xHE
BE CAREFUL, THE COST OF YOUR PAYMENT INCREASES $10,000 EACH DAY AFTER THE FOURTH DAY
Access to the panel ( Contact us )
The panel address: http://xbt4titax4pzza6w.onion/EvcNuvq4gckb/
Alternative addresses
hxxps://xbt4titax4pzza6w.onion.pet/EvcNuvq4gckb/
hxxps://xbt4titax4pzza6w.onion.to/EvcNuvq4gckb/
Access to the panel using Tor Browser
If non of our links are accessible you can try tor browser to get in touch with us:
Step 1: Download Tor Browser from here: https://www.torproject.org/download/download.html.en
Step 2: Run Tor Browser and wait to connect
Step 3: Visit our website at: panel address
If you're having a problem with using Tor Browser, Ask Google: how to use tor browser
Wants to make sure we have your decrypter?
To make sure we have your decrypter you can upload at most 3 files (maximum size allowance is 10 MB in total) and get your data back as a demo.
Where to buy Bitcoin?
The easiest way is LocalBitcoins, but you can find more websites to buy bitcoin using Google Search: buy bitcoin online

Screenshot of files encrypted by Robbinhood ("Encrypted_random.enc_robbinhood" extension):

Files encrypted by Robbinhood

Robbinhood ransomware removal:

Instant automatic removal of Robbinhood virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Robbinhood virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Robbinhood virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Robbinhood ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Robbinhood ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Robbinhood are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Robbinhood, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Robbinhood ransomware.

Note that the Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Robbinhood ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity
Medium

Increased attack rate of infections detected within the last 24 hours.

QR Code
Robbinhood virus QR code
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Platform: Windows

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