Jupstb Ransomware

Also Known As: Jupstb virus
Distribution: Low
Damage level: Severe

Jupstb ransomware removal instructions

What is Jupstb?

Jupstb is a ransomware-type program that cyber criminals (its developers) use to encrypt data stored on victims' computers and to blackmail them by making ransom demands. This malicious program was discovered by GrujaRS. Once files are encrypted, Jupstb renames them by adding a new (additional) ".jupstb" extension. For example, "1.jpg" becomes "1.jpg.jupstb". It also creates a ransom message that can be found in a file called "Readme_Restore_Files.txt".

The "Readme_Restore_Files.txt" ransom message informs Jupstb victims that encrypted files should not be renamed and third party tools employed to decrypt files should not be used. According to developers, these actions might cause permanent data loss. I.e., these cyber criminals urge users who have computers infected with Jupstb not to use the help of other people or employ any other decryption tools to regain access to files. There are two emails provided (johnsonwhate@protonmail.com and johnsonwhate@tutanota.com) to contact developers of this ransomware. It is likely that, once contacted, they will state the cost of the decryption tool and provide a cryptocurrency wallet address to pay the ransom. Typically, cyber criminals demand ransom payments in a cryptocurrency (such as Bitcoin). They promise to send decryption tools as soon as their demands are met. In fact, most cyber criminals do not keep their promises. Once they receive the money, they simply ignore victims and do not send any decryption tools. Therefore, do not contact developers of Jupstb. Unfortunately, most encryptions performed by ransomware-type programs can only be decrypted using tools that specific ransomware developers have. They use cryptography algorithms (symmetric or asymmetric) that make it impossible to 'crack' them without using the correct tool. There are no tools capable of decrypting files affected by Jupstb free of charge (at least not at the moment). The best, free solution to retrieve files is to use a backup and restore everything from there.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Jupstb decrypt instructions

New ransomware-type programs are developed each day, however, most are essentially identical. Some other examples are KARLS, DESYNC, and Pluto. These malicious programs are designed to encrypt data and to allow developers to blackmail victims and make ransom demands. Common differences are cost of decryption tools and the cryptography used to encrypt files stored on the infected computer. Despite any similarities, most ransomware-type infections are 'uncrackable', unless they are not fully developed or have bugs/flaws. To avoid data loss, generate regular backups and store them on unplugged storage devices or remote servers.

How did ransomware infect my computer?

It is not known which particular method Jupstb developers use to distribute this ransomware, however, most of these developers use virtually identical methods. Cyber criminals proliferate malicious programs using spam email campaigns, fake software updaters, third party software download tools, malicious programs called Trojans, and software cracking tools. They use spam campaigns to proliferate ransomware-type programs by sending emails with malicious attachments. These attachments are usually MS Office documents, PDF files, RAR, ZIP or other archives, executable files (.exe), and so on. Opening these attachments usually leads to computer infection by programs such as Jupstb. Computer infections by ransomware often occur through fake software updaters. These tools usually exploit bugs, flaws of outdated software or download malware rather than the expected updates or software fixes. Various P2P (Peer-to-Peer) networks (eMule, torrent clients), third party software downloaders, freeware download and free file hosting websites, and other sources of this type are also used by cyber criminals. They present infected files as legitimate. People who download and execute them cause ransomware infections and others. Trojans are malicious programs that proliferate other programs of this type. If a Trojan is installed on a computer, it is likely that it will cause chain infections. Software cracking tools supposedly allow users to bypass software activation and to use paid software free of charge, however, cyber criminals employ these tools to cause infections. Rather than activating any software, these tools install malicious programs.

Threat Summary:
NameJupstb virus
Threat TypeRansomware, Crypto Virus, Files locker
SymptomsCan't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Distribution methodsInfected email attachments (macros), torrent websites, malicious ads.
DamageAll files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection.

To eliminate Jupstb virus our malware researchers recommend scanning your computer with Spyhunter.
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Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

To prevent computer infections, be very cautious when browsing the internet, downloading, installing or updating software. Never open files/attachments or click links that are presented in emails received from unknown/suspicious addresses. Download software using only official sources and direct download links. Various third party downloaders and installers often proliferate rogue applications, and thus these tools should never be used. The same apples to unofficial websites, Peer-to-Peer networks, and so on. Keep software up-to-date, however, use implemented functions or tools provided by the official developers. Avoid using software cracking tools. These tools are illegal (using them is a cyber crime) and they cause installation of high-risk computer infections. Have a reputable anti-virus/anti-spyware tool installed and running - these programs detect and eliminate malicious programs before any damage is done. If your computer is already infected with Jupstb, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Jupstb ransomware text file "Readme_Restore_Files.txt":

Do not rename the ciphered files.
Do not try to decrypt your data with the help of the third-party software, it can cause constant data loss.
If you, your programmers or your friends help you to decrypt your files - it can lead to data loss.
You do not joke with files.

My email johnsonwhate@protonmail.com, johnsonwhate@tutanota.com

Screenshot of files encrypted by Jupstb (".jupstb" extension):

Files encrypted by Jupstb

Jupstb ransomware removal:

Instant automatic removal of Jupstb virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Jupstb virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

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.

Safe Mode with Networking

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.

Windows 8 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.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Jupstb 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.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

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 Jupstb ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Jupstb 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 Jupstb 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.

Restoring files encrypted by CryptoDefense

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 regain control of the files encrypted by Jupstb, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Jupstb ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • 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 Jupstb ransomware: