*.thor ransomware removal instructions
What is *.thor?
*.thor is a new variant of Locky ransomware. Developers spread this ransomware via spam emails. Following infiltration, *.thor encrypts various files using asymmetric cryptography. During encryption, this ransomware renames files using the "[8_random_characters]-[4_random_characters]-[4_random_characters]-[4_random_characters]-[12_random_characters].thor" pattern. For example, the name of an encrypted file might be renamed to "D56F3331-380D-9317-3F9C-6CE2C2BB051.thor". Once files are encrypted, *.thor places two files (.html and .bmp, both named "_WHAT_is") on the desktop and changes the desktop wallpaper.
The .html and .bmp files contain an identical ransom-demand message stating that files are encrypted using RSA-2048 and AES-128 encryption algorithms. The message also states that the files can only be restored using a private key with a decryption tool. As mentioned above, *.thor encrypts files using asymmetric cryptography. Therefore, two keys (public [encryption] and private [decryption]) are generated during encryption. The private key is stored on remote servers owned by cyber criminals. Claims that decryption without this key is impossible are in unfortunately correct. To restore their files, victims must supposedly pay a ransom of 3 Bitcoins (currently equivalent to ~$1952), however, paying does not guarantee that your files will ever be decrypted. Cyber criminals often ignore victims, despite payments made. If you pay, there is a high probability that you will be scammed. Therefore we strongly advise you to ignore all requests to pay or contact these people. Unfortunately, there are currently no tools available to decrypt compromised files free of charge - the only solution is to restore your files/system from a backup.
Screenshot of a message (wallpaper) encouraging users to pay a ransom to decrypt their compromised data:
All ransomware-type viruses are virtually identical. As with *.thor, malware such as Cerber, CTB-Locker, and Cry also encrypt files and demand hundreds or even thousands of dollars. There are only two major differences: size of ransom and type of cryptography used (symmetric/asymmetric). Viruses such as *.thor are distributed using spam emails (malicious attachments), peer-to-peer (P2P) networks (for example, Torrent, eMule, etc.), fake software update tools, and trojans. Therefore, be cautious when opening files received from unrecognized/suspicious email addresses and downloading software from unofficial sources. Furthermore, keep your installed software up-to-date - cyber criminals are capable of exploiting software bugs to infiltrate the system. Using a legitimate anti-virus/anti-spyware program is also very important.
Screenshot of *.thor ransomware .bmp file ("_WHAT_is.bmp"):
Screenshot of *.thor ransomware .html file ("_WHAT_is.html"):
Screenshot of *.thor ransomware Tor website:
Screenshot of files encrypted by *.thor ransomware ("[8_random_characters]-[4_random_characters]-[4_random_characters]-[4_random_characters]-[12_random_characters].thor" pattern):
File types targeted by *.thor ransomware:
7zip; .aac; .accdb; .accde; .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; .cdr4; .cdr5; .cdr6; .cdrw; .cdx; .cer; .cfg; .cgm; .cib; .class; .cls; .cmd; .cmt; .config; .contact; .cpi; .cpp; .craw; .crt; .crw; .csh; .csl; .csr; .css; .csv; .CSV; .d3dbsp; .dac; .das; .dat; .db_journal; .dbf; .dbx; .dch; .dcr; .dcs; .ddd; .ddoc; .ddrw; .dds; .der; .des; .design; .dgc; .dif; .dip; .dit; .djv; .djvu; .dng; .doc; .DOC; .docb; .docm; .docx; .dot; .DOT; .dotm; .dotx; .drf; .drw; .dtd; .dwg; .dxb; .dxf; .dxg; .edb; .eml; .eps; .erbsql; .erf; .exf; .fdb; .ffd; .fff; .fhd; .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; .mbx; .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; .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; .raf; .rar; .rat; .raw; .rdb; .rtf; .RTF; .rvt; .rwl; .rwz; .s3db; .safe; .sas7bdat; .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; .tarbz2; .tbk; .tex; .tga; .tgz; .thm; .tif; .tiff; .tlg; .txt; .uop; .uot; .upk; .vbox; .vbs; .vdi; .vhd; .vhdx; .vmdk; .vmsd; .vmx; .vmxf; .vob; .wab; .wad; .wallet; .wav; .wks; .wma; .wmv; .wpd; .wps; .xis; .xla; .xlam; .xlc; .xlk; .xlm; .xlr; .xls; .XLS; .xlsb; .xlsm; .xlsx; .xlt; .xltm; .xltx; .xlw; .xml; .ycbcra; .yuv; .zip
*.thor 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:
- What is *.thor?
- STEP 1. *.thor virus removal using safe mode with networking.
- STEP 2. *.thor ransomware removal using System Restore.
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.
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.
Video showing how to start Windows 8 in "Safe Mode with Networking":
Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.
Video showing how to start Windows 10 in "Safe Mode with Networking":
Log in to the account infected with the *.thor 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.
2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.
3. Next, type this line: rstrui.exe and press ENTER.
4. In the opened window, click "Next".
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 *.thor ransomware virus infiltrating your PC).
6. In the opened window, click "Yes".
7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining *.thor 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 *.thor 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.
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 protect your computer from file encrypting 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 *.thor ransomware.)
HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user intervention:
Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:
- 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 *.thor ransomware: