JURASIK Ransomware

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

JURASIK ransomware removal instructions

What is JURASIK?

Discovered by MalwareHunterTeam, JURASIK is a new variant of high-risk ransomware called JSWorm. As with most ransomware infections, JURASIK stealthily infiltrates computers and encrypts most stored files. During encryption, JURASIK appends filenames with the victim's unique ID, developer's email address, and the ".JURASIK" extension. For example, "1.jpg" might be renamed to a filename such as "1.jpg.[ID-512064768][doctorSune@protonmail.com].JURASIK". JURASIK encrypts files so that cyber criminals (developers) can generate revenue by blackmailing victims (offering paid decryption of files). After successful encryption, JURASIK stores the "JURASIK-DECRYPT.txt" text file on the desktop. This file contains a ransom-demand message.

The delivered message informs victims about the decryption and offers paid decryption. The type of cryptography (symmetric or asymmetric) used by JURASIK is currently unknown, however, each victim receives a unique decryption key, which is necessary to restore data. Cyber criminals store all keys on a remote server, thus allowing them to blackmail victims. To decrypt data, victims must pay a ransom. The cost is not specified (this information and decryption instructions are provided via email), however, the ransom usually fluctuates between $500 and $1500. The payment must be submitted using the Bitcoin cryptocurrency. Victims are also permitted to attach up to three selected files (not larger than 1 MB each), which are then restored and returned as 'proof' that decryption is possible. This is done to gain the victim's trust, however, cyber criminals can never be trusted. These people are notorious for ignoring victims, once payments are submitted. Therefore, paying usually gives no positive results and users are simply scammed. Therefore, ignore all requests to submit payments or even contact these people. Unfortunately, JURASIK is undecryptable ransomware - there are no tools capable of cracking the encryption and restoring data free of charge. The only solution is to restore everything from a backup, if one has been created.

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

JURASIK decrypt instructions

Ransomware infections are all very similar and JURASIK - it shares many similarities with dozens of other similar infections, such as Actin, Rectot, Virus-encoder. Most of these infections compromise data (typically, by encryption) and make ransom demands. There are typically just two major differences: 1) size of ransom, and; 2) type of encryption algorithm used. Unfortunately, these malicious apps usually employ cryptographies such as RSA, AES, and other similar cryptographies designed to generate unique decryption keys. Therefore, if the malware is fully developed and has no bugs/flaws, manual decryption is impossible. Ransomware presents a strong case for maintaining regular data backups, however, store them on a remote server or unplugged storage device, since locally stored backups are encrypted with other regular files. Furthermore, bear in mind that storage devices and servers can be damaged. Therefore, have multiple backup copies stored in different locations.

How did ransomware infect my computer?

The exact way developers proliferate JURASIK is currently unknown, however, infections of this type are usually distributed using spam email campaigns, unofficial software download sources, fake software updaters/cracks and trojans. Spam campaigns are used to send hundreds of thousands of emails that contain malicious attachments and deceptive messages encouraging users to open them. In most cases, attachments are presented as important documents such as receipts, invoices, bills or similar, in attempts to give the impression of legitimacy and trick users into opening them. Unofficial download sources are also used in a similar manner. Criminals employ peer-to-peer (P2P) networks, free file hosting websites, freeware download sites, etc. to present malicious executables as legitimate software. In this way, users are tricked into manual download/installation of malware. Fake updaters typically infect computers by exploiting outdated software bugs/flaws or simply downloading and installing malware rather than updates. Fake 'cracks' also infect computers rather than enabling access to paid software features. Finally, trojans are malicious applications that stealthily infiltrate computers and inject additional malware.

Threat Summary:
Name JURASIK virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .JURASIK (this ransomware also appends filenames with the victim's unique ID and developer's email address).
Ransom Demanding Message JURASIK-DECRYPT.txt text file
Cyber Criminal Contact doctorSune@protonmail.com, supportdocctor@protonmail.com
Detection Names Avast (Win32:Trojan-gen), BitDefender (DeepScan:Generic.Malware.GSTk.1F5A494D), ESET-NOD32 (a variant of Win32/Filecoder.NVV), Kaspersky (Trojan-Ransom.Win32.Foreign.ogiv), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All 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.
Removal

To eliminate JURASIK virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
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?

The main reasons for computer infections are poor knowledge and careless behavior. The key to safety is caution. Therefore, pay attention when browsing the Internet and downloading/installing/updating software. Handle all email attachments with care. Files/links received from suspicious/unrecognizable email addresses should never be opened. The same applies to attachments that are irrelevant. Download apps from official sources only, using direct download links. You should avoid using third party downloaders/installers, since they often include rogue apps. Keeping installed applications and operating systems up-to-date is important, however, this should be achieved only through implemented functions or tools provided by the official developer. Software piracy is a cyber crime and the risk of infection is very high. Therefore, never attempt to crack known, installed applications. Have a reputable anti-virus/anti-spyware suite installed and running. This software can eliminate malware infections before they harm the system. If your computer is already infected with JURASIK, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in JURASIK ransomware text file ("JURASIK-DECRYPT.txt"):

All your files were encrypted!
Your personal ID: 512064768

>>> Contacts:
    doctorSune@protonmail.com
    supportdoctor@protonmail.com (in case of no answer)

>>> What should I include in my message?
1. Country
2. List of encrypted drives and their size
3. Extension of encrypted files (.[ID-512064768][doctorSune@protonmail.com].JURASIK)
4. JURASIK PUBLIC KEY (below)


>>> Free decryption as guarantee!
Before paying you send us up to 3 files for free decryption.
Send pictures, text files. (files no more than 1mb)


>>> ATTENTION!
1. Do not rename encrypted files.
2. Do not try to decrypt your data using third party software, it may cause permanent data loss.
3. Decryption of your files with the help of third parties may cause increased price (they add their fee to
our) or you can become a victim of a scam.


>>> WAYS OF OBTAINING BITCOINS!
1. hxxps://localbitcoins.com
2. hxxps://www.coinbase.com
3. hxxps://www.xmlgold.eu


-------BEGIN JURASIK PUBLIC KEY-------

fnJje3VlfHVpe3NregBrf3FregFrec0pyc@tfr0mpcr1skwOA==

-------END JURASIK PUBLIC KEY-------

Screenshot of files encrypted by JURASIK (".JURASIK" extension):

Files encrypted by JURASIK

JURASIK ransomware removal:

Instant automatic removal of JURASIK 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 JURASIK 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 JURASIK 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 JURASIK 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 JURASIK 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 JURASIK 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 JURASIK, 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 JURASIK 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 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 JURASIK ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity
Medium

Increased attack rate of infections detected within the last 24 hours.

QR Code
JURASIK virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of JURASIK virus on your mobile device.
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Platform: Windows

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