CryptMix is a file-encrypting ransomware, which will encrypt the personal documents found on victim’s computer using RSA-2048 key (AES CBC 256-bit encryption algorithm), appending the .code extension to encrypted files.
CryptMix then displays a message which offers to decrypt the data if a payment of 5 Bitcoins (where one bitcoin is currently worth about $400/£280) is made.
We cannot help your recover your files, apart from suggesting to use ShadowExplorer or (free) File Recovery Software. This guide was written to help you remove the infection itself, and if a 100% proven method to recover the encrypted files is found, we will update this guide.
At this moment, there is now decryptor available for the CryptMix ransomware. However, you can try to search these webpages for updates: https://decrypter.emsisoft.com/ or https://id-ransomware.malwarehunterteam.com/
1. How did the CryptMix virus got on my computer?
2. What is CryptMix Ransomware?
3. Is my computer infected with CryptMix virus?
4. Is it possible to decrypt files encrypted by CryptMix?
5. How to remove the CryptMix ransomware (Virus Removal Guide)
6. How to prevent your computer from becoming infected by CryptMix
This Article Contains:
1. How did the CryptMix ransomware got on my computer?
The CryptMix ransomware is distributed via spam email containing infected attachments or links to malicious websites. Cyber-criminals spam out an email, with forged header information, tricking you into believing that it is from a shipping company like DHL or FedEx. The email tells you that they tried to deliver a package to you, but failed for some reason. Sometimes the emails claim to be notifications of a shipment you have made. Either way, you can’t resist being curious as to what the email is referring to – and open the attached file (or click on a link embedded inside the email). And with that, your computer is infected with the CryptMix ransomware.
2. What is CryptMix Ransomware?
The CryptMix ransomware targets all versions of Windows including Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10. This infection is notable due to how it encrypts the user’s files – namely, it uses AES-265 and RSA encryption method – in order to ensure that the affected user has no choice but to purchase the private key.
When the CryptMix ransomware is first installed on your computer it will create a random named executable in the %AppData% or %LocalAppData% folder. This executable will be launched and begin to scan all the drive letters on your computer for data files to encrypt.
CryptMix ransomware searches for files with certain file extensions to encrypt. The files it encrypts include important productivity documents and files such as .doc, .docx, .xls, .pdf, among others. When these files are detected, this infection will change the extension to .code, so they are no longer able to be opened.
Files targeted are those commonly found on most PCs today; a list of file extensions for targeted files include:
.sql, .mp4, .7z, .rar, .m4a, .wma, .avi, .wmv, .csv, .d3dbsp, .zip, .sie, .sum, .ibank, .t13, .t12, .qdf, .gdb, .tax, .pkpass, .bc6, .bc7, .bkp, .qic, .bkf, .sidn, .sidd, .mddata, .itl, .itdb, .icxs, .hvpl, .hplg, .hkdb, .mdbackup, .syncdb, .gho, .cas, .svg, .map, .wmo, .itm, .sb, .fos, .mov, .vdf, .ztmp, .sis, .sid, .ncf, .menu, .layout, .dmp, .blob, .esm, .vcf, .vtf, .dazip, .fpk, .mlx, .kf, .iwd, .vpk, .tor, .psk, .rim, .w3x, .fsh, .ntl, .arch00, .lvl, .snx, .cfr, .ff, .vpp_pc, .lrf, .m2, .mcmeta, .vfs0, .mpqge, .kdb, .db0, .dba, .rofl, .hkx, .bar, .upk, .das, .iwi, .litemod, .asset, .forge, .ltx, .bsa, .apk, .re4, .sav, .lbf, .slm, .bik, .epk, .rgss3a, .pak, .big, wallet, .wotreplay, .xxx, .desc, .py, .m3u, .flv, .js, .css, .rb, .png, .jpeg, .txt, .p7c, .p7b, .p12, .pfx, .pem, .crt, .cer, .der, .x3f, .srw, .pef, .ptx, .r3d, .rw2, .rwl, .raw, .raf, .orf, .nrw, .mrwref, .mef, .erf, .kdc, .dcr, .cr2, .crw, .bay, .sr2, .srf, .arw, .3fr, .dng, .jpe, .jpg, .cdr, .indd, .ai, .eps, .pdf, .pdd, .psd, .dbf, .mdf, .wb2, .rtf, .wpd, .dxg, .xf, .dwg, .pst, .accdb, .mdb, .pptm, .pptx, .ppt, .xlk, .xlsb, .xlsm, .xlsx, .xls, .wps, .docm, .docx, .doc, .odb, .odc, .odm, .odp, .ods, .odt
Once your files are encrypted with the .code exntesion, the CryptMix ransomware will create the HELP_YOUR_FILES.txt text files ransom note in each folder that a file has been encrypted and on the Windows desktop. The ransomware will also change your Windows desktop wallpaper to HELP_YOUR_FILES.png.
These files are located in every folder that a file was encrypted as well as in the user’s Startup folder so that they are automatically displayed when a user logs in. These files will contain the informations on how to access the payment site and get your files back.
When the infection has finished scanning your computer it will also delete all of the Shadow Volume Copies that are on the affected computer. It does this so that you cannot use the shadow volume copies to restore your encrypted files.
The ransom note tells the user their files were locked with an RSA-2048 algorithm, gives them an ID, and urges them to send an email to one of two email addresses (xoomx[@]dr.com and xoomx[@]usa.com) so that they recover their files.
The crooks answer the victim’s email and provide them with a link and a password to the One Time Secret service, a website that lets users share password-protected messages.
3. Is my computer infected with CryptMix virus?
If your computer is infected with the CryptMix ransomware will display a red HELP_YOUR_FILES.png wallpaper that covers the entire desktop, and all your documents will have a .code extension. A HELP_YOUR_FILES.txt text file will be placed on your desktop. Both files contain instruction on how or recover the encrypted files.
The messages displayed by this ransomware infection can be localized depending on the user’s location, with text written in the appropriate language.
This the message that the CryptMix ransomware may display:
Dear User,
to decrypt your files You will need a special software with your special unique private key.
Price of software and your private key is 5 bitcoins. With this product you can decrypt all your files and protect Your system!!! Protect!!! Your system will be without any vulnerability.
Also You will have a FREE tech support for solving any PC troubles for 3 years!
You can buy bitcoins through this bitcoin web site https://localbitcoins.com/
Register there and find a nearest Bitcoin seller. It`s easy! Choose more comfortable payment method for buying Bitcoin!
After that You should send 5 bitcoins to the bitcoin wallet address:
[removed]All this process is very easy! It`s like a simple money transfer.
And now most important information:
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!
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 will be doubled by the Main Server automatically. So now you have a chance to restore your PC with low price!
Best regards,
Charity Team
4. Is it possible to decrypt files encrypted by CryptMix?
No, at this time it’s not possible to recover the files encrypted by the CryptMix ransomware.
CryptMix is notable due to how it encrypts the user’s files – namely, it uses AES-265 and RSA encryption method – in order to ensure that the affected user has no choice but to purchase the private key. The RSA public key can only be decrypted with its corresponding private key. Since the AES key is hidden using RSA encryption and the RSA private key is not available, decrypting the files is not feasible as of this writing.
Brute forcing the decryption key is not realistic due to the length of time required to break an AES encryption key.
Because the needed private key to unlock the encrypted file is only available through the cyber criminals, victims may be tempted to purchase it and pay the exorbitant fee. However, doing so may encourage these bad guys to continue and even expand their operations. We strongly suggest that you do not send any money to these cyber criminals, and instead address to the law enforcement agency in your country to report this attack.
5. How to remove the CryptMix ransomware (Virus Removal Guide)
If you DO NOT plan on paying the ransom and want to try to restore your files, you can follow the below guide.
It’s important to understand that by starting the removal process, you risk of losing your files, as we cannot guarantee that you will be able to recover them. Furthermore, your files may be permanently compromised when trying to remove this infection or trying to recover the encrypted documents.
This page is a comprehensive guide, which will remove the CryptMix infection from your computer, however we cannot guarantee that your personal files will be recovered. We cannot be held responsible for losing the documents during this removal process.
A. Remove CryptMix ransomware from your computer
Malwarebytes and HitmanPro can detect and remove this infection, but these programs cannot recover your encrypted files due to the nature of asymmetric encryption, which requires a private key to decrypt files encrypted with the public key.
STEP 1: Remove CryptMix virus with Malwarebytes Anti-Malware Free
Malwarebytes Anti-Malware Free uses industry-leading technology to detect and remove all traces of malware, including worms, Trojans, rootkits, rogues, dialers, spyware, and more.
It is important to note that Malwarebytes Anti-Malware works well and should run alongside antivirus software without conflicts.
- You can download download Malwarebytes Anti-Malware from the below link.
MALWAREBYTES ANTI-MALWARE DOWNLOAD LINK (This link will open a new web page from where you can download “Malwarebytes Anti-Malware Free”) - Once downloaded, close all programs, then double-click on the icon on your desktop named “mbam-setup” to start the installation of Malwarebytes Anti-Malware.
You may be presented with a User Account Control dialog asking you if you want to run this file. If this happens, you should click “Yes” to continue with the installation. - When the installation begins, you will see the Malwarebytes Anti-Malware Setup Wizard which will guide you through the installation process.
To install Malwarebytes Anti-Malware on your machine, keep following the prompts by clicking the “Next” button.
- Once installed, Malwarebytes Anti-Malware will automatically start and you will see a message stating that you should update the program, and that a scan has never been run on your system. To start a system scan you can click on the “Scan Now” button.
- Malwarebytes Anti-Malware will now start scanning your computer for malware. When Malwarebytes Anti-Malware is scanning it will look like the image below.
- When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes Anti-Malware has detected. To remove the malicious programs that Malwarebytes Anti-malware has found, click on the “Remove Selected” button.
Please note that the infections found may be different than what is shown in the image. - Malwarebytes Anti-Malware will now quarantine all the malicious files and registry keys that it has found. When removing the files, Malwarebytes Anti-Malware may require a reboot in order to remove some of them. If it displays a message stating that it needs to reboot your computer, please allow it to do so.
After your computer will restart, you should open Malwarebytes Anti-Malware and perform another “Threat Scan” scan to verify that there are no remaining threats
You may be presented with a User Account Control dialog asking you if you want to run this file. If this happens, you should click “Yes” to continue with the installation.
STEP 2: Double-check for the CryptMix malware infection with HitmanPro
HitmanPro is a second opinion scanner, designed to rescue your computer from malware (viruses, trojans, rootkits, etc.) that have infected your computer despite all the security measures you have taken (such as anti-virus software, firewalls, etc.). HitmanPro is designed to work alongside existing security programs without any conflicts. It scans the computer quickly (less than 5 minutes) and does not slow down the computer.
- You can download HitmanPro from the below link:
HITMANPRO DOWNLOAD LINK (This link will open a new web page from where you can download “HitmanPro”) - Double-click on the file named “HitmanPro.exe” (for 32-bit versions of Windows) or “HitmanPro_x64.exe” (for 64-bit versions of Windows). When the program starts you will be presented with the start screen as shown below.
Click on the “Next” button, to install HitmanPro on your computer.
- HitmanPro will now begin to scan your computer for CryptMix malicious files.
- When it has finished it will display a list of all the malware that the program found as shown in the image below. Click on the “Next” button, to remove CryptMix virus.
- Click on the “Activate free license” button to begin the free 30 days trial, and remove all the malicious files from your computer.
B. How to restore your files encrypted by CryptMix ransomware
In some cases, it may be possible to recover previous versions of the encrypted files using System Restore or other recovery software used to obtain “shadow copies” of files.
Option 1: Restore your files encrypted by CryptMix ransomware with ShadowExplorer
CryptMix will attempt to delete all shadow copies when you first start any executable on your computer after becoming infected. Thankfully, the infection is not always able to remove the shadow copies, so you should continue to try restoring your files using this method.
- You can download ShadowExplorer from the below link:
SHADOW EXPLORER DOWNLOAD LINK (This link will open a new web page from where you can download “ShadowExplorer”) - Once you have downloaded and installed ShadowExplorer, you can follow the below video guide on how to restore your files while using this program.
Alternatively, you can use the System Restore to try to recover the encrypted documents.
Option 2: Restore your files encrypted by CryptMix ransomware with File Recovery Software
When CryptMix encrypts a file it first makes a copy of it, encrypts the copy, and then deletes the original. Due to this you can use file recovery software such as:
- Recuva
You can follow the below guide on how to use Recuva:
- EaseUS Data Recovery Wizard Free
- R-Studio
How to prevent your computer from becoming infected by CryptMix
To protect your computer from the Cryptowall ransomware, you should always have an antivirus installed on your computer and always have a backup for your personal documents. As an extra protection method, you can use programs called HitmanPro.Alert or CryptoPrevent, which will prevent any file encrypting malware from running.
Your computer should now be free of the CryptMix ransomware infection.
If you are still experiencing problems while trying to remove virus from your machine, please do one of the following:
- Run a system scan with Emsisoft Emergency Kit.
- Start a new thread in our Malware Removal Assistance forum.
