BOK Ransomware Virus (Removal Steps and Protection Updates)

The BOK ransomware is a strain of the Cryptolocker malware family which is used as a ransomware-as-a-service (RaaS) offered by computer criminals on the Dark Web. To learn more about it and how to remove axisting infections continue reading our removal guide.


File Extensions


Solution #1
You can skip all steps and remove BOK with the help of an anti-malware tool.

Solution #2
BOK ransomware can be removed manually, though it can be very hard for most home users. See the detailed tutorial below.

Spam Email Campaigns, malicious ads & etc.

BOK Ransomware Description

The BOK ransomware is a new Ransomware-as-a-service (RaaS) which is based on the Cryptolocker malware family. Paying users receive the source code of the virus and the criminal users can modify the ransom sum requests and the Bitcoin wallet address for receiving the payments.

Upon infection the virus encrypts all target user file extensions. As a result of this the victims have to pay the sum to restore their files. The description of the RaaS states that the decryption is done automatically when the payment is received. The developers of the code receive a 10% share of the ransomware payments.

The full list of the affected file extensions includes the following:

.7zip, .aac, .accdb, .accdr, .accdt, .ach, .acr, .act, .adb, .adp, .ads, .aes, .agdl,
.aiff, .ait, .aoi, .apj, .apk, .ARC, .arw, .asc, .asf, .asm, .asp, .aspx, .asset, .asx, .avi,
.awg, .back, .backup, .backupdb, .bak, .bank, .bat, .bay, .bdb, .bgt, .bik, .bin, .bkp,
.blend, .bmp, .bpw, .brd, .bsa, .cdf, .cdr, .cdr3, .cd4, .cd5, .cd6, .cdrw, .cdrx, .cer, .cfg,.
.cgm, .clb, .class, .cls, .cmd, .cmt, .config, .contact, .cpi, .cpp, .craw, .crt, .crw, .csh,
.csl, .csr, .css, .csv, .CSV, .d3dbsp, .dac, .das, .dat, .db_journal, .dbfm ,.dbx, .dch, .dcr,
.dcs, .ddd, .ddoc, .ddrw, .dds, .der, .des, .design, .dgc, .dif, .dip, .dit, .djb, .djvu, .dng,
.doc, .DOC, .docb, .docm, .docx, .dot, .DOT, .dotm, .dotx, .drf, .drw, .drw, .dtd, .dwg, .dxb,
.dxf, .dxg, .edb, .eml, .eps, .erbsql, .erf, .fdb, .ffd, .fff, .ffhd, .fla, .flac, .flf, .flv, .flvv,
.forge, .fpx, .frm, .fxg, .gif, .gpg, .gray, .grey, .groups, .gry, .hbk, .hdd, .hpp, .html,
.hwp, .ibank, .ibd, .ibz, .idx, .iif, .iiq, .incpas, .indd, .iwi, .jar, .java, .jnt, .jpe, .jpeg, .jpg,.
.kdbx, .kdc, .key, .kpdx, .kwm, .laccdb, .lay, .lay6, .lbf, .ldf, .lit, .litemod, .litesql, .log,
.ltx, .lua, .m2ts, .mapimail, .max, .mdb, .mdb, .mdc, .mdf, .mef, .mfw, .mid, .mkv, .mlb,
.mml, .mmw, .mny, .moneywell, .mos, .mov, .mpeg, .mpg, .mrw, .ms11 (Security copy),
.msg, .myd, .MYD, .MYI, .ndd, .ndf, .nef, .NEF, .nop, .nrw, .nsd, .nsf, .nsg, .nsh,
.nvram, .nwb, .nxl, .nyf, .oab, .obj, .odb, .odc, .odf, .odf, .odg, .odm, .odp, .ods, .odt, .ogg,
.oil, .onetoc2, .orf, .ost, .otg, .oth, .otp, .ots, .ott, .pab, .pages, .PAQ, .pas, .pat, .pcd,
.pct, .pdb, .pdd, .pdf, .pef, .pem, .pfx, .php, .pif, .plc, .plus_muhd, .png, .pot, .potm,
.potx, .ppam, .pps, .ppsm, .ppsx, .ppt, .PPT, .pptm, .pptx, .prf, .psafe3, .psd,
.pspimage, .pst, .ptx, .pwm, .qba, .qbb, .qbm, .qbr,.qbw, .qbx, .qby, .qcow, .qcow2,
.qed, .rf, .rar, .rat, .raw, .rdb, .rtf, .RTF, .rvt, .rwl, .rwz, .s3db, .safe, .sas7dbat, .sav,
.save, .say, .sch, .sda, .sdf, .sldm, .sldx, .slk, .sql, .sqlite, .sqlite3, .SQLITE3,. sqlitedb,
.SQLITEDB, .srf, .srt, .srw, .stc, .std, .sti, .stm, .stw, .stx, .svg, .swf, .sxc, .sxd, .sxg,
.sxi ,.sxm, .sxw, .tar, .tar.bz2, .tbk, .tex, .tga, .tgz, .thm, .rif, .tiff, .tlg, .txt, .uop, .uot,
.upk, .vbox, .vbs, .vdi , .vhd, .vhdx, .vmdk, .vmsd, .vmx, .vmxf, .vob, .wab, .wad,
.wallet, .wav, .wks, .wma, .wmv, .wmv, .wpd, .wps, .xis, .xla, .xlam, .xlc, .xlk, .xlm, .xlr, .xls,
.XLS, .xlsb, .xlsx, .xlt, .xltm, .xltx, .xlw, .xml, .ycbcra, .yuv, .zip

A sample ransomware note features the following content:

BOK Ransomware

All of your files are encrypted with RSA-2048 and AES-128 ciphers.

More information about the RSA and AES-128 ciphers.

More information about the RSA and AES can be found here: (cryptosystem) Encryption Standard

Decrypting of your files is only possible with the private key and decrypt program, which is
on our secret server.
To receive your private key follow one of the links:

If all of this addresses are not available, follow these steps:
1. Download and install Tor Browser:
2. After a successful installation, run the browser and wait for initialisation.
3. Type in the address bar: “$sitedomain1″.onion/”$Personalid” or “$sitedomain2″.onion/”$Personalid”

BOK Ransomware Distribution

The BOK ransomware is delivered via the usual malware infection methods – hijackers, exploit kits and infected software downloads.

BOK Ransomware Removal

For a faster solution, you can run a scan with an advanced malware removal tool and delete BOK completely with a few mouse clicks.

STEP I: Start the PC in Safe Mode with Network
This will isolate all files and objects created by the ransomware so they will be removed efficiently.

    1) Hit WIN Key + R


    2) A Run window will appear. In it, write “msconfig” and then press Enter
    3) A Configuration box shall appear. In it Choose the tab named “Boot
    4) Mark “Safe Boot” option and then go to “Network” under it to tick it too
    5) Apply -> OK

Or check our video guide – “How to start PC in Safe Mode with Networking

STEP II: Show Hidden Files

    1) Open My Computer/This PC
    2) Windows 7

      – Click on “Organize” button
      – Select “Folder and search options
      – Select the “View” tab
      – Go under “Hidden files and folders” and mark “Show hidden files and folders” option

    3) Windows 8/ 10

      – Open “View” tab
      – Mark “Hidden items” option


    4) Click “Apply” and then “OK” button

STEP III: Enter Windows Task Manager and Stop Malicious Processes

    1) Hit the following key combination: CTRL+SHIFT+ESC
    2) Get over to “Processes
    3) When you find suspicious process right click on it and select “Open File Location
    4) Go back to Task Manager and end the malicious process. Right click on it again and choose “End Process
    5) Next you should go folder where the malicious file is located and delete it

STEP IV: Remove Completely BOK Ransomware Using SpyHunter Anti-Malware Tool

Manual removal of BOK requires being familiar with system files and registries. Removal of any important data can lead to permanent system damage. Prevent this troublesome effect – delete BOK ransomware with SpyHunter malware removal tool.

SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

STEP V: Repair Windows Registry

    1) Again type simultaneously the Windows Button + R key combination
    2) In the box, write “regedit”(without the inverted commas) and hit Enter
    3) Type the CTRL+F and then write the malicious name in the search type field to locate the malicious executable
    4) In case you have discovered registry keys and values related to the name, you should delete them, but be careful not to delete legitimate keys

Further help for Windows Registry repair

STEP VI: Recover Encrypted Files

    1) Use present backups
    2) Restore your personal files using File History

      – Hit WIN Key
      – Type “restore your files” in the search box
      – Select “Restore your files with File History
      – Choose a folder or type the name of the file in the search bar


      – Hit the “Restore” button

    3) Using System Restore Point

      – Hit WIN Key
      – Select “Open System Restore” and follow the steps


STEP VII: Preventive Security Measures

    1) Enable and properly configure your Firewall.
    2) Install and maintain reliable anti-malware software.
    3) Secure your web browser.
    4) Check regularly for available software updates and apply them.
    5) Disable macros in Office documents.
    6) Use strong passwords.
    7) Don’t open attachments or click on links unless you’re certain they’re safe.
    8) Backup regularly your data.

SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

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Author : Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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