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Removal of BASS-FES Ransomware and restore .basslock extension files

BASS-FES Ransomware-Threat In Detail

BASS-FES (BitchASS File Encryption System) is a file-encrypting program and is a variant of HiddenTear Ransomware. It encrypts important files on the attacked device like docs, PDF, images, videos and images so on and appends .basslock extension to the encrypted files. This means the files are no more accessible to users. BASS-FES ransomware also leaves a ransom note that notifies users about their data being encrypted by BASS File encryption method and asks user to contact to the authors to the provided e-mail address. The ransom demanded by the extortionists is 1BTC and restore the files back. Security Experts doesn’t recommend you pay the fine. There is no guarantee that paying the ransom will give you access to your files. Remove BASS-FES immediately.

Technical Details

Name BASS-FES Ransomware
Type Ransomware
Description BASS-FES Ransomware encrypts files, videos, images and texts stored on the target PC and demand a ransom amount from users to decode the files.
Occurrence spam mail attachments., exploit kits, malicious links and java script codes..
Possible Symptoms The ransom note can be seen on desktop and other file directories and files could not be accessible.
Detection Tool Download the Detection toolTo confirm attack of BASS-FES Ransomware virus on your computer.

Ransomware defender2 download

Distribution Method

BASS-FES Ransomware is distributed through spam mail attachment as a malicious script containing the payloads of the malware which if executed by the user could install the threat onto the computer system. Many cyber-criminals uses spam techniques to trick users by heading the mail as any invoice or shipment. Other sources might include visiting infected websites containing java script codes, exploit kits and spam bots. As you open the document or click the link, the payloads of BASS-FES Ransomware gets downloaded on the system and installed without any user’s permission. If the user open/execute this file on their device, then the virus gets installed and your PC will become infected with BASS-FES file-encrypting Ransomware threat.

More about BASS-FES Ransomware

BASS-FES Ransomware is a file-encrypting program that searches for important files on the victim’s PC and renders them non-accessible to users. And further ask users to pay the ransom to get the decryption key and unlock the files.

The ransomware changes the windows Registry entries to launch each time the window’s starts and takes up huge system resources to encrypt the files. BASS-FES Ransomware drops various executable files within %AppData% or %LocalAppData% folder. And then starts the encryption process which consumes lots of CPU resources. Thus you may notice the computer’s performance slowed down.

The files contains the ransom note and instructions for users on how to contact the authors of the ransomware and get their files back.

How to remove BASS-FES Ransomware


The ransom note by BASS-FES virus states that your documents has been encrypted and you need to pay a ransom in Bitcoins to get back your files. The ransom demands varies for the user and the victims should contact with the provided email address as soon as possible.


List of file extension encrypted

→.txt, .doc, .docx, .xls, .xlsx, .pdf, .pps, .ppt, .pptx, .odt, .gif, .jpg, .png, .db, .csv, .sql, .mdb.sln.php, .asp, .aspx, .html, .xml, .psd, .frm, .myd, .myi, .dbf, .mp3, .mp4, .avi, .mov, .mpg, .rm, .wmv, .m4a, .mpa, .wav, .sav, .gam, .log, .ged, .msg, .myo, .tax, .ynab, .ifx, .ofx, .qfx, .qif, .qdf, .tax2013, .tax2014, .tax2015, .box, .ncf, .nsf, .ntf, .lwp, .crt, .csr, .flv, .key, .mdb, .mkv, .mpeg, .pem, .pptm, .sqlite3, .sqlitedb, .tif, .wma, .xlm, .xlsm, .xltm

BASS-FES Ransomware uses AES encryption algorithm to encrypt data and appends random extensions to it. The crypto-malware ensures that the user could be able to recover the files from shadow volume copies, so it deletes the files by executing the command

→vsBASS-FESmin.exe delete shadows /all /Quiet

If you are among the one being a victim of “BASS-FES Ransomware”, then we would strongly suggest you not to pay any ransom to illegitimate persons behind it. Because even after paying they are not going to give your files back. So it is urged that you must opt for removal solutions for BASS-FES Ransomware and try to recover files by automatic data recovery tool or any backup copy if you have.


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