.CK File Virus – Remove and Decrypt Files for Free - How to, Technology and PC Security Forum | SensorsTechForum.com

.CK File Virus – Remove and Decrypt Files for Free

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This article has been created to help you remove the .CK CryptoMix ransomware variant and decrypt files that have been encrypted by it on your PC.

Yet another of the many CryptoMix ransomware versions has appeared in the wild following the .EXTE CryptoMix variant, using the .CK file extension and a ransom note with absolutely the same name – “_HELP_INSTRUCTION.TXT”. The ransomware aims to use multiple different types of important files on the computers infected by it. The files are then encoded by the encryption algorithm used by CryptoMix and become no longer openable until the victim makes a payment. If your computer has been infected by the .CK file virus, we advise you to read this article thoroughly.

Threat Summary

Name.CK Virus
TypeRansomware, Cryptovirus
Short DescriptionEncrypts the files on the computers infected by it in order to demand ransom from victims.
SymptomsAdds the .CKfile extension and changes the names of the encrypted files.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .CK Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .CK Virus.

.CK File Ransomware – What Does It Do

The .CK file ransomware is an iteration of the CryptoMix ransomware variants. This means that the virus performs different malicious activities on a system it has infected, starting wit dropping it’s malicious payload files after an infection takes place. The files are dropped with the aid of a dropper or a loader. Such software may come on your computer via pretending to be a legitimate file, like:

  • Fake setup of any type of software uploaded online.
  • A document which may be an invoice, receipt or other seemingly important file and may contain malicious macros.
  • A fake game activator, license activation software or other type of setup.
  • A fake web link posted as a button on suspicious sites or linked as a commend on social media or other websites.

After this has occurred the, .CK ransomware may quickly connect to the C2 servers of the cyber-criminals and download the payload. It may consist of multiple files that have different, often random names and are located in the usual Windows folders:

  • %AppData%
  • %Roaming%
  • %Local%
  • %LocalLow%
  • %Temp%

After being dropped and activated the files belonging to the .CK CryptoMix ransomware may perform the following activities:

  • Obtain administrative permissions by Inserting various different functions in Windows processes.
  • Manage to interfere with the Windows Registry Editor and modify the Run and RunOnce registry sub-keys.
  • Insert administrative commands in Windows Command Prompt that may delete the shadow copies on your computer.

The primary activity of the virus is to perform the encryption of the important files on the computers infected by it. The .CK file virus attacks the following files to render them enciphered:

.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.

After having done this, the files no longer appear the same. They are appended the .CK file extension and their names are completely changed to random ones, making them appear like the following:

Fortunately, this CryptoMix ransomware variant is likely decryptable, but first it is important to remove it completely. For more information how to remove the .CK file virus and then decrypt your files, we advise you to follow the instructions below. Experts strongly advise firstly removing this virus and then performing the decryption on an already safe PC.

Remove .CK CryptoMix from Your PC

Before actually beginning the removal process, we would advise to backup all your files, even though they are encrypted. Then, we recommend you to follow the instructions below. You can try to find and remove the malicious files of the .CK ransomware manually, but for maximum effectiveness, a ransomware-specific anti-malware programs should be used to scan for and remove all traces of the .CK file virus automatically.


Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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