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:

Isolating the infected device:

Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.

Step 1: Disconnect from the internet.

The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:

Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result: Disconnecting computer from the Internet (step 1)

Click the "Change adapter settings" option in the upper-left corner of the window: Disconnecting computer from the Internet (step 2)

Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable". Disconnecting computer from the Internet (step 3)

Step 2: Unplug all storage devices.

As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:

Navigate to "My Computer", right-click on each connected device and select "Eject": Ejecting external storage devices

Step 3: Log-out of cloud storage accounts.

Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.

Identify the ransomware infection:

To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).

Identify ransomware-type infection (step 1)

This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).

Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).

Identify ransomware-type infection (step 2)

This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.

One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).

Identify ransomware-type infection (step 3)

The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.

Example 1 (Qewe [Stop/Djvu] ransomware):

Identify ransomware-type infection (step 4)

Example 2 (.iso [Phobos] ransomware):

Identify ransomware-type infection (step 5)

If your data happens to be encrypted by a ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, ransom message title, file extension, provided contact emails, cryptowallet addresses, etc.).

Search for ransomware decryption tools:

Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cyber criminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.

Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.

Searching for ransomware decryption tools in website

Restore files with data recovery tools:

Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use EaseUS Data Recovery Wizard Pro. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data).

▼ Download
EaseUS Data Recovery Wizard Pro

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Trial version of EaseUS Data Recovery Wizard Pro is capable of scanning drives and listing recoverable files - to restore them, you must purchase a license.

Step 1: Perform a scan.

Hover your mouse over the partition you wish to scan and select "Scan". You can also select a specific folder, or click shortcut icons to scan the Desktop or Recycle Bin: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 1)

Wait for EaseUS Data Recovery Wizard Pro to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundreds gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 2)

Step 2: Recover data.

Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data. Note also that the trial version of EaseUS Data Recovery Wizard Pro is only capable of scanning drives and listing recoverable files - to restore them, you must purchase a license: Recovering data with EaseUS Data Recovery Wizard Pro

Step 3: Save the scan session (optional).

We recommend that you save the scanning session once you have completed recovery, in case you decide to recover additional files later. Simply click the "Save Scan Session" icon in the upper-right corner of the screen and choose the location for the file to be saved. This will save a lot of time, since you will not need to re-scan the storage drive the next time you wish to restore something. Bear in mind, however, that data removed after the scanning session has finished will not be listed: Saving scan session in EaseUS Data Recovery Wizard Pro

Create data backups:

Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.

Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all necessary information on Microsoft's documentation web page.

Data backups: The most reliable backup method is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach. Therefore, you should consider using an application to create data backups locally.

▼ Download
EaseUS Todo Backup

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 EaseUS Todo Backup. 30 days free trial available.

We recommend using the EaseUS Todo Backup application. The "Home" edition of EaseUS Todo Backup is usually more than adequate for regular users, however, the "Business" edition is more suitable for companies and large computer networks. The EaseUS Todo Backup application provides extensive data protection features. You can easily create backups, and encrypt and compress them for enhanced protection and storage saving purposes. It also allows you to set backup schedules, create bootable devices, and restore the system if a crash occurs. You can easily choose where to store the created backup: locally; uploaded to an external drive; FTP; cloud storage, or elsewhere. In summary, EaseUS Todo Backup is an all-in-one tool, which provides all features required to properly backup your data.

Creating a data backup:

The backup process is virtually identical regardless of the item (file, partition, entire system) you wish to backup. Taking the File Backup feature as an example:

Step 1: Choose which item to backup.

Click on the "Menu" icon in the upper-left corner of the screen to reveal the menu and select "File Backup": Creating data backups with EaseUS Todo Backup tool (step 1)

Select the files you want to backup. You can also enter a name and description of the backup that will be created: Creating data backups with EaseUS Todo Backup tool (step 2)

Step 2: Change the default settings.

The EaseUS Todo Backup application provides a variety of additional options that can be added/modified while creating the backup. For example, you can encrypt data (add a password), select the compression rate (how much the backup should be compressed), performance (how many system resources should be allocated), add an email notification (you receive an email once the process is complete) and so on.

To open the options window, click the "Backup options" button in the lower-left corner of the screen: Creating data backups with EaseUS Todo Backup tool (step 3)

Select the settings you want to change and click "Save". You can also reset your changes by clicking "Reset to initial settings": Creating data backups with EaseUS Todo Backup tool (step 4)

Step 3: Select the backup destination.

As mentioned above, EaseUS Todo Backup allows you to choose where backups are saved - locally or externally.

Click the "Browse..." button and select the location you want the backup to be saved: Creating data backups with EaseUS Todo Backup tool (step 5)

Step 4: Safety measures and process completion.

Depending on the location you have chosen, there are a number of measures you should or should not take. If you are uploading to an internet-connected location (for example, Cloud storage, FTP, etc.), be sure to maintain your internet connection, otherwise you will have to start again. The same applies to external storage devices - do not unplug them until the process is complete.

The progress bar displays estimated time remaining until completion. Large backups (hundreds of gigabytes) can take hours to create (depending on storage device speed, internet connection, etc.). Therefore, the application also allows you to optionally choose what the system should do (shut down, sleep or hibernate) once the process has finished: Creating data backups with EaseUS Todo Backup tool (step 6)

The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.

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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