.juststb Files Virus - How to Remove It

.jupstb Files Virus – How to Remove It

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This article has been created with the main idea to you in explaining what is the .jupstb files virus and how you can remove it effectively from your computer.

New form of ransomware has recently been detected by security researcher GrujaRS. The virus is from the crypto kind of ransomware, meaning it renders your files temporary useless via encryption until you pay ransom to get them to work again. The .jupstb files virus also leaves behind the Readme_Restore_Files.txt ransom note, that aims to convince users that their only choice is to contact the criminals to negotiate the payment they must make for their files. If your computer has been infected with the .jupstb files virus, we recommend that you read this article.

Threat Summary

Name.juststb Files Virus
TypeRansomware, Cryptovirus
Short DescriptionA cryptovirus that aims to encode the files on your computer and then demand ransom to get the files working once again.
SymptomsFiles have the .jupstb file extension and can no longer be opened. The ransomware adds a ransom note, called Readme_Restore_Files.txt, asking to contact the crooks.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .juststb Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .juststb Files Virus.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

.jupstb Files Virus -Distribution Methods

For the .jupstb file ransomware to be spread onto the computers of users, the virus may arrive via different methods. It often arrives via a main infection file, which has been reported by malware researchers to be the following:

→ SHA-256: a43f964264c8a0817151d9b380ee65efa2dc179de9d32c1695b4be5b487f4436
File name:a43f964264c8a0817151d9b380ee65efa2dc179de9d32c1695b4be5b487f4436.exe
File size:3.64 MB

If we pay attention to the file, it can arrive via several means, the first and most likely of which could be a malicious script that may be affecting victims either via a web link or an infected Microsoft Office document (.docx, .docm). If the file manages to infect victims via Microsoft Office, then it may be spread as a result of malicious macros being directly added to the compromised computer.

In addition to this, the ransomware virus may also infect by being sent to users via e-mail. Such e-mails often tend to convince victims to download and run the malicious file themselves, making it seem that the file is a legitimate document, like:

  • Invoice.
  • Receipt.
  • Work-related document.
  • “Account compromised” info file.

Opening the file attachment may result in an infection based on the file type attached itself. More information on the different Windows malicious file types can be seen underneath:

Related: Windows File Types Used by Malware (2019)

.jupstb Files Virus – Analysis

The .jupstb file ransomware may drop the several malicious files onto the computers of victims upon infecting them and these files may be randomly named or may resemble legitimate programs. They may reside in the following Windows directories:

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

In addition to this, the .jupstb ransomware may also drop the ransom note file, containing the virus’ extortinist message:


The ransomware first begins to drop a randomly named file on the desktop of the victim computer. Shortly after this is done, the viurs changes the wallpaper of the infected computer to black and encrypts the files. The ransomware virus may also perform other activities on the victim’s computer, such as:

  • Modify the registry editor.
  • Delete the volume shadow copies on the victim PC. Obtain administrator permissions.
  • Collect system information from your computer.

If the .jupstb ransomware tries to collect information from your compter, it will most likely be the following:

  • Network information.
  • OS version and architecture.
  • Language and Region data.

In addition to this, the ransomware may also create mutexes on your computer that may allow it to escalate the privileges of the virus files it activates.

.jupstb Files Virus – Encryption Process

The .jupstb files virus is the type of infection that may encrypt your files using advanced encryption algorithms. These ciphers may render your files temporary obsolete by replacing key data in them. Te .jupstb virus may not encrypt your whole files but only batches of data in them, enough to make them unable to be opened.

The .jupstb file ransomware may then add its distinctive file extension to the encrypted files, making them appear like the following:

Remove .jupstb Files Virus and Try Recovering Your Data

If you want to remove this ransomware, please do not tamper with your files, since this may lead to their permanent breaking. Instead, try to save all the encrypted files in a flash drive or another external memory carrier.

For the removal of the .jupstb files virus, we recommend that you follow the removal manual underneath. If manual removal does not succeed in removing files, encrypted by this ransomware virus, we recommend that you remove this virus automatically, preferably with the aid of an advanced anti-malware software. Such tool will get your files removed automatically by scanning for them and deleting them.

If you want to try and restore files, encrypted by this virus, we recommend that you follow the removal instructions underneath this article. They have been made to help restore most of your encrypted files, even though they may not be 100% effective.


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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