bitcoin666 Ransomware

Also Known As: bitcoin666 virus
Distribution: Low
Damage level: Severe

bitcoin666 ransomware removal instructions

What is bitcoin666?

There are many various ransomware-type programs, bitcoin666 is categorized as one as too. It was discovered by MalwareHunterTeam. Cyber criminals use bitcoin666 to prevent victims from accessing their files (to make data unusable). As a rule, in order to recover their files, victims must to pay ransomware developers a ransom. This malicious program renames every encrypted file by adding the "" extension to its name. For example, it changes "1.jpg" filename to "" and so on. Ransom note can be found in every folder that contains encrypted files, it is named "Recover Files.TXT". bitcoin666 is also designed to change victim's desktop wallpaper.

As stated in the ransom note, victims can regain access to their files only after paying cyber criminals .3 Bitcoin into the provided Bitcoin wallet address. However, if victims do not pay them in 24 hours, price of the decryption will be increased to .4 Bitcoin. Before paying it is possible to send bitcoin666's developers a file that is no larger that 5mb, as a proof that they have the decryption tool they will decrypt that one file for free. To contact cyber criminals victims should use either or email address. They also warn their victims not to try to decrypt files by themselves (using some other decryption tool). They say that by using other tools people might cause permanent data loss. Unfortunately, most cyber criminals (ransomware developers) are the only ones who can provide their victims with the decryption tools and/or keys. Typically, ransomware-type programs cause encryptions that can be decrypted using tools that only their developers have. However, we do not recommend to pay cyber criminals, very often they do not send the promised decryption tools. They receive the money (ransom) and then simply ignore their victims. There is no free way to decrypt files encrypted by bitcoin666, at least not at this moment. For this reason we recommend to use data backup (if there is one created) and restore files from there.

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

bitcoin666 decrypt instructions

Ransomware-type programs usually are very similar, most of them are used them to encrypt files and to keep them locked unless a ransom is paid. Here are a few examples of other programs of this type: MegaLocker, Langolier and Etols. Main differences usually are cost of a decryption and cryptography algorithm (symmetric or asymmetric) that is used to encrypt files. Unfortunately, most victims are forced to contact cyber criminals because ransomware-type programs usually are impossible to 'crack' without using tools that only they have. It can be done without interference of ransomware developers only if a program is not fully developed, has bugs, flaws and so on. To avoid data loss (or/and having to contact cyber criminals) in the future, we recommend to create data backups and store them on remote servers or unplugged storage devices.

How did ransomware infect my computer?

To spread computer infections, cyber criminals use spam campaigns, Trojans, unreliable software download sources, fake software updating tools and programs that are designed to activate paid software for free ('cracking' tools). They attempt to cause computer infections through spam campaigns by sending emails that include malicious attachments. The main purpose of this method is to trick people into opening attached files or links leading to them. Included attachments usually are executables (.exe and other files), archives like RAR, ZIP, PDF, Microsoft Office documents, JavaScript files etc. When downloaded and opened, these files infect computers by installing various viruses. Trojans are malicious programs that are designed to spread other viruses, to cause chain infections. However, they must be installed first. Free file hosting, freeware download websites, Peer-to-Peer networks such torrent clients, eMule, unofficial websites and other untrustworthy software download sources are often used to present malware as harmless, legitimate files. When people download and open them, they often cause installations of high-risk viruses by themselves. Fake software updating tools proliferate computer infections by downloading malicious programs instead of the updates, fixes or by exploiting outdated software's bugs, flaws and so on. Tools that people use to bypass paid activations can be used to spread viruses too. They often install malicious programs instead of operating as expected.

Threat Summary:
Name bitcoin666 virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension
Ransom Demanding Message Recover Files.TXT text file
Ransom Amount .3 or .4 Bitcoin
Cyber Criminal Contact,
Detection Names (bitcoin666.exe) Avast (Win32:Trojan-gen), BitDefender (Gen:Variant.Ransom.HiddenTear.1), ESET-NOD32 (a variant of MSIL/Filecoder.AK), McAfee (Ransomware-FTD!5A7F266D0CC5), 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.
Additional Information Changes victim's desktop wallpaper.
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.

To eliminate bitcoin666 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?

Files attached to emails that are received from unknown or suspicious addresses, are presented in irrelevant letters should not be trusted. All software should be downloaded from official websites and using direct links. Other sources that we mentioned above should not be used for that. Installed programs or operating system should be updated via tools or implemented functions that are provided by official software developers only. If installed software is not free, it should be activated properly. Usage of various 'cracking' tools is a cyber crime and also leads to installations of malicious programs. Another important thing is to have a reputable anti-virus or anti-spyware software installed and to keep it enabled at all times. These tools usually are good at preventing computers from being infected with various viruses. If your computer is already infected with bitcoin666, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in bitcoin666 ransomware's text file "Recover Files.TXT":

PC id: -
ATTENTION!!! All your files are encrypted.
If you want to get your files back, you should pay me 0.3 BTC on the following address:
You have only 24 hours since you received that e-mail, after that price will be 0.4BTC.
To prove that we can bring back your files, attach a file between 1~5mb to be decoded.
After recieving your payment I'll send you a simple program and encryption key for it.
Note:Trying to recover your files with another program may result in a fatal loss of all your files. Only the original decoder and key can bring all your files back.
You can buy bitcoins here:
Here's a FAQ how to buy and send bitcoins (any language):hxxps://
Write us: or

Screenshot of bitcoin666's desktop wallpaper:

bitcoin666 wallpaper

Screenshot of files encrypted by bitcoin666 ("" extension):

Files encrypted by bitcoin666

bitcoin666 ransomware removal:

Instant automatic removal of bitcoin666 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 bitcoin666 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 bitcoin666 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 bitcoin666 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 bitcoin666 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 bitcoin666 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 bitcoin666, 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 bitcoin666 ransomware.

Note that Windows 10 Fall Creators Update includes "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default this feature automatically protects files stored in 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's more information on how to get this update and add 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 bitcoin666 ransomware: