CryptoMix Ransomware [Updated]

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

CryptoMix ransomware removal instructions

What is CryptoMix?

CryptoMix is a dubious ransomware-type virus that encrypts various data stored on the infected computer. During encryption, this ransomware appends the name of each encrypted file with .DLL, .FILE, .SHARK, .arena, .EMPTY, .wallet, .noob, .ck, .zayka, .ERROR, .OGONIA, .CNC, .PIRATE, .ZERO, .DG, .code, .rscl, .rmd or .lesli extension. Furthermore, CryptoMix creates two files (HELP_YOUR_FILES.TXT and HELP_YOUR_FILES.HTML) and places them in each folder containing the encrypted files. The updated variant of this ransomware stores the ransom demand message in _INTERESTING_INFORMACION_FOR_DECRYPT.TXT, _HELP_INSTRUCTION.TXT or #_RESTORING_FILES_#.TXT files. Both files contain a message informing users of the encryption. The newest variant of this ransomware presents its ransom demand message in the INSTRUCTION RESTORE FILE.txt file - encrypted files are renamed using the following pattern:[]_id[victim’s ID].rdmk.

The message states that files have been encrypted and that a ransom must be paid to restore them. The developers of CryptoMix state that the RSA-2048 encryption algorithm is used for encryption. This is an asymmetric encryption process and, therefore, two keys (public and private) are generated during encryption - public to encrypt, and private to decrypt. Unfortunately, the private key is stored on remote servers controlled by cyber criminals. Therefore, to receive a decrypter with an embedded private key, users are encouraged to pay a large sum of money. Research shows that developers of this ransomware demand 5 Bitcoins (currently equivalent to $2240.95). As compared with other ransomware-type viruses, this ransom is large (ransom demands usually fluctuate between 0.5 and 1.5 BTC). To pay, victims are instructed to contact cyber criminals via an email address provided. They then supposedly receive further payment instructions. Unfortunately, at time of research, there were no tools capable of decrypting files encrypted with this algorithm and the only solution is to restore your files from a backup.

Screenshot of a message encouraging users to contact the developers of CryptoMix ransomware (via,,,,, or to decrypt their compromised data:

.Code decrypt instructions

.Code has very similar characteristics to Yakes, KeyBTC, TrueCrypt, and many other ransomware-type viruses. All encrypt files and make ransom demands. The only differences are encryption algorithm used and size of ransom. Be aware that paying the ransom does not guarantee that your files will ever be decrypted and is equivalent to sending your money directly to the cyber criminals - you will simply support their malicious businesses. Therefore, you are strongly advised never to contact cyber criminals or pay any ransom. Malware such as .Code is mostly distributed via malicious e-mail attachments, peer to peer (P2P) networks, fake software updates, and/or trojans. Therefore, keep your installed software up-to-date and use a legitimate anti-virus/anti-spyware suite. In addition, be careful when opening attachments sent from unrecognized email addresses and when downloading files/programs from third party sources.

Update 21 February, 2017 - Security researchers from Avast and CERT.PL have released a decrypter for this ransomware. You can download it HERE. (Note that this tool will not always work but it is well worth a try if your computer is infected by this ransomware).

cryptfile2 cryptomix cryptoshield decrypter


.Code ransomware HELP_YOUR_FILES.TXT file

Updated variant of CryptoMix ransomware using #_RESTORING_FILES_#.TXT file for the ransom demand message:

cryptomix ransomware restoring files txt file #_RESTORING_FILES_#.TXT

Text presented within this file:

All your files have been encrypted!
All your files have been encrypted due to a security problem with your PC. If you want to restore them,
 write us to the e-mail
Write this ID in the title of your message -
You have to pay for decryption in Bitcoins. The price depends on how fast you write to us.
 After payment we will send you the decryption tool that will decrypt all your files.
Free decryption as guarantee
Before paying you can send us up to 5 files for free decryption. The total size of files must be less than 10Mb
 (non archived), and files should not contain valuable information.
databases,backups, large excel sheets, etc.)
How to obtain Bitcoins
The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select
 the seller by payment method and price.
Also you can find other places to buy Bitcoins and beginners guide here:
Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss.
Decryption of your files with the help of third parties may cause increased price (they add their fee to our)
 or you can become a victim of a scam.

Screenshot of files encrypted by this ransomware (.code or .id_[unique victim’s ID]_email_rscl@dr.com_.rscl extensions):

 cryptomix ransomware email .rscl file extensions

Text presented in the .TXT and .HTML files:


What happened to your files ?
All of your files were protected by a strong encryption with RSA-2048.
More information about the encryption keys using RSA-2048 can be found here: hxxp://

How did this happen?
!!! Specially for your PC was generated personal RSA-2048 KEY, both public and private.
!!! ALL YOUR FILES were encrypted with the public key, which has been transferred to your computer via Internet.
!!! Decrypting of your files is only possible with the help of the private key and decrypt program, which is on our Secret Server

What do I do? So, there are two ways you can choose: wait for a miracle and get your price doubled, or start obtaining BITCOIN NOW!, and restore your data easy way.
If You have really valuable data, you better not waste your time, because there is no other way to get your files, except make a payment.

For more specific instructions:
Contact us by email only, send us email along with your ID number and wait for further instructions. Our specialist will contact you within 12 hours.
For you to be sure, that we can decrypt your files - you can send us a single encrypted file and we will send you back in a decrypted form. This will be your guarantee.

Screenshot of a ransom demanding message “_HELP_INSTRUCTIONS.TXT” (used by a variant of this ransomware that adds ”.EXTE” extension to encrypted files:

cryptomix .exte variant

Text presented in this random demanding message:


Attention! All Your data was encrypted!

For specific information, please send us an email with Your ID number:

We will help You as soon as possible!


A version of CryptoMix ransomware that adds .ZERO extension to encrypted files and presents a ransom demanding message in _HELP_INSTRUCTION.TXT file.

Screenshot of _HELP_INSTRUCTION.TXT file:

cryptomix ransomware .zero variant ransom demanding message

Text presented in this file:


At the moment, your system is not protected.
We can fix it and restore files.
To restore the system write to this address:
DECRYPT-ID-4b727545-9148-49e1-864a-9b9d32a88041 number

Screenshot of files encrypted by this variant of CryptoMix ransomware (.ZERO) extension:

cryptomix ransomware file encrypted .zero extension

Update January 10, 2019 - CryptoMix's developers have recently released an updated version of this ransomware. Unlike it's previous variants, CryptoMix now uses a completely different tactic to swindle money out of credulous users. What crooks basically do is generate a text file containing a message that encourages victims to contact them if they want to restore files. After doing so, victims receive an email that contains a link to One Time Secret's website - a site that allows it's users post their stories for a short period of time. What's more important is that cyber criminals pretend to be employees of Worldwide Children Charity Community and attempt to appeal to victim's kindness. Crooks claim that a lot of children from around the world need help and attempt to trick users into "donating" money, which will supposedly be used to buy presents and medicine for these children. Their main goal is to convince users that by sending the money they will simply help sick children and, as a reward, their data will be restored. However, obviously, this is a mere scam. The attached link leads to One Time Secret's website page which continues the exact same story.

Screenshot of the created text file ("_HELP_INSTRUCTION.txt"):

CryptoMix Children donation text file

Text presented within this file:


Attention! All Your data was encrypted!

For specific information, please send ups an email with Your ID number:

Please send email to all email addresses! We will help You immediately!


DECRYPT-ID: --- number

Screenshot of the email reply:

CryptoMix Children donation email

Text presented within this email:

Subject: Re: Ransom


We are glad to hear You! And We will be happy to help You!

Password: ***********

Please read it carefully! After that just follow Your instruction and You will solve this problem very quickly!
Our kind regards
Support Manager
Worldwide Children Charity Community

Her diagnosis: Acute Lymphoblastic Leukemia (ALL)
Need for medical help: $130k
Already contributed: $81k

Screenshot of the One Time Story page that attached link leads to (the same page also contains detailed instructions on how to submit a payment):

CryptoMix Children Donation One Time Story page

Text presented within this page:

This message is for you:

We are the International Children Charity Organisation! Your money will be spent for the children charity. So that is mean that You will get a participation in this process too. Many children will receive presents and medical help!

And We trust that you are kind and honest person! Thank You very much! We wish You all the best! Your name will be in the main donors list and will stay in the charity history!

Remember. You can save many children destinies! Money for You is just a paper (You will ear money again in the next month), but for many children is a real chance to change their life!

Also ONLY WE can give to our customers very important benefits:

1) You will restore all Your data immediately

2) Your network vulnerabilities will be closed

3) You will protect Your system from the main attack in the future! It's a very important option!
Only our community can give You this opportunity! All other anti-malware companies just promise it, but in fact they cannot protect YOU! It's very terrible!

4) Main idea - many children will receive a donation and medical help from Your name!

5) You will have a free tech support for solving any PC troubles! Just ask a support and support will help You!

P.S> When your payment will be delivered you will receive your software with private key IMMEDIATELY!

P.P.S> In the next 24 hours your price may be doubled by the Main Server automatically.

Screenshot of another One Time Story page which URL users receive after submitting the payment (although the page contains a download link of a "decrypter", do not fall for that - it is highly credible that the tool is fake, since cyber criminals are very likely to never reward their victims):

CryptoMix Children Donation One Time Story page 2

Text presented within this page:

This message is for you:


First of all We want to say THANK YOU! Soon one of the children foundation will receive a medical help from Your name! It's a great moment!

You should be proud of yourself!

Here is Your personal software:


Password: **********

Download it to the encrypted PC, switch off all anti-virus programs, unzip it, start it.

Just in 5 minutes all Your data will be recovered and protected! Your network vulnerabilities will be closed!

All our community is blessing You! We wish You all the best!

Our kind regards!

CryptoMix ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Malwarebytes By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

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":

Step 2

Log in to the account infected with the .Code 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 .Code 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 .Code 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 .Code 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 .Code, 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 Malwarebytes Anti-Ransomware, which artificially implant group policy objects into the registry to block rogue programs such as .Code ransomware.

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 .Code 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 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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Removal Instructions in other languages
Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
CryptoMix virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of CryptoMix virus on your mobile device.
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