JCry ransomware removal instructions
What is JCry?
JCry is high-risk ransomware that stealthily infiltrates computers and encrypts stored data. Research shows that developers tried to proliferate JCry by exploiting a certain web plug-in implemented on various Israeli websites. Due to faulty source code, however, they failed. JCry encrypts data and appends filenames with the ".jcry" extension (e.g., "sample.jpg" is renamed to "sample.jpg.jcry"). Once data is encrypted, JCry opens a pop-up window and generates an HTML file ("JCRY_Note.HTML"), placing a copy in each existing folder.
As with most ransomware-type infections, JCry's HTML file delivers a message informing victims of the encryption and making ransom demands. It is stated that victims must send the equivalent of $500 in Bitcoins to receive a decryption key and successfully recover data. No additional information regarding the encryption is provided. Therefore, it is currently unknown whether JCry uses symmetric or asymmetric cryptography. Nevertheless, it is certain that each victim will receive a unique decryption key, without which, restoring data is impossible. Cyber criminals hide all decryption keys on a remote server and blackmail victims for their release. Note that cyber criminals cannot be trusted. You should never attempt to contact these people, and certainly do not send them any money. Research shows that ransomware developers often ignore victims once ransoms are paid. Therefore, victims pay and receive nothing in return. Never believe any of their statements and ignore requests to contact these people or pay ransoms. Unfortunately, there are no tools capable of cracking JCry encryption and restoring data free of charge. Therefore, 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:
The internet is full of ransomware-type viruses similar to JCry including Promok, Frendi, and ARTEMY - these are just some examples from many. Note that, although the developers are different, all of these viruses have identical behavior - they encrypt data and make ransom demands. In most cases, infections such as JCry have just two major differences: 1) cost of recovery, and; 2) type of cryptography used. Unfortunately, ransomware-type viruses usually employ algorithms such as RSA, AES, and others that generate unique decryption. Therefore, unless the virus is still in development or has certain bugs/flaws, restoring data manually without involvement of developers (contacting these people is not recommended) is impossible. Ransomware presents a strong case for maintaining regular data backups, however, store them on unplugged storage devices or remote servers. Backups stored locally will probably be encrypted together with regular data.
How did ransomware infect my computer?
As mentioned above, JCry is promoted via compromised websites. Developers modified the DNS record of a popular web access plug-in from the nagich.com website. These cyber criminals mainly target Israeli websites. Once a website that uses the compromised plug-in is visited, users are redirected to a page that performs certain actions. Firstly, the site checks whether the visitor is using the Windows Operating System. The idea behind the script is to feed Windows users with fake pop-up messages claiming that their Adobe Flash Player is out-of-date and encouraging them to update it, however, the script contains a small, yet fatal flaw. One of the "if" statements which decides what actions to perform contains an error. Therefore, even if the visitor is using Windows OS, he/she is treated as a non-Windows user and, thus, the fake Adobe Flash Player pop-up never occurs. Bear in mind, however, that this error is fixable. If the problem is resolved, cyber criminals are very likely to continue to use this method. Ransomware-type infections are often distributed using spam email campaigns, third party software download sources, cracks, and trojans. Spam campaigns are used to send malicious attachments (usually presented as important documents) to hundreds of thousands of recipients. The emails also contain deceptive messages encouraging users to open attached links/files, however, this results in various system infections. Freeware download websites, free file hosting sites, peer-to-peer (P2P) networks (such as torrents, eMule, etc.) are used to proliferate malware by presenting it as legitimate software. Users are tricked into manually downloading and installing malware. The idea behind cracking tools is to bypass paid software activation without paying, however, most are used to proliferate infections. In this way, many users often download and install malware, rather than gaining access to paid features. Finally, trojans are malicious applications that stealthily infiltrate computers and continually inject additional malware.
|Threat Type||Ransomware, Crypto Virus, Files locker|
|Encrypted Files Extension||".jcry"|
|Ransom Demanding Message||pop-up window, "JCRY_Note.HTML" file|
|Cyber Criminal Contact||Tor website|
|Detection Names (flashplayer_install.exe)
||Avast (Win32:Malware-gen), BitDefender (Trojan.GenericKD.31751954), ESET-NOD32 (Win32/Filecoder.NUU), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)|
|Symptoms||Can'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 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.|
|Malware Removal (Windows)||
To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
How to protect yourself from ransomware infections?
To prevent these computer infections, be very cautious when downloading, installing, and updating software, and browsing the internet. Be sure to download apps from official sources only, via direct download links. Third party downloaders/installers often include rogue apps, and thus these tools should never be used. The same applies to software updates. It is important to keep installed applications and operating systems up-to-date, however, this should be achieved only through implemented functions or tools provided by the official developer. Never use software cracking tools, since software piracy is considered a cyber crime and the risk of infection is extremely high. You are also advised to think twice before opening email attachments. If the sender seems suspicious/unrecognizable, or if the received link/file is irrelevant, do not open anything. Have a reputable anti-virus/anti-spyware suite installed and running. These tools can detect and remove malware before the system is harmed. If your computer is already infected with JCry, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.
Text presented in JCry ransomware HTML file ("JCRY_Note.html"):
All Your Important Files have been Encrypted
1- Send 500$ worth of Bitcoin to this Address : 1FKWhzAeNhsZ2JQuWjWsEeryR6TqLkKFUt
2- Download Tor Browser and Open the following Link : Recovery Link
3- Enter the Address used in Payement
4- We'll check your Payement and upload your Decryption Key
5- Open the same link again (after a while) and enter your Unique ID to get your Decryption Key
Your Unique Key :
The appearance of JCry ransomware pop-up:
Text presented in this pop-up:
[#] Jerusalem is the capital of Palestine [#]
If you are reading this, all your important files have been encrypted,
read JCRY_NOTE.html in your Desktop for more information.
[X] Enter Your Decryption Key :
Screenshot of files encrypted by JCry (".jcry" extension):
JCry 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 JCry virus?
- STEP 1. Isolating the infected device.
- STEP 2. Identifying the ransomware infection.
- STEP 3. Searching for ransomware decryption tools.
- STEP 4. Restoring files with data recovery tools.
- STEP 5. Creating data backups.
Isolating the infected device:
Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.
Step 1: Disconnect from the internet.
The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:
Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result:
Click the "Change adapter settings" option in the upper-left corner of the window:
Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable".
Step 2: Unplug all storage devices.
As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:
Navigate to "My Computer", right-click on each connected device and select "Eject":
Step 3: Log-out of cloud storage accounts.
Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.
Identify the ransomware infection:
To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).
This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).
Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).
This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.
One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).
The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.
Example 1 (Qewe [Stop/Djvu] ransomware):
Example 2 (.iso [Phobos] ransomware):
If your data happens to be encrypted by a ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, ransom message title, file extension, provided contact emails, cryptowallet addresses, etc.).
Search for ransomware decryption tools:
Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cyber criminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.
Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.
Restore files with data recovery tools:
Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use EaseUS Data Recovery Wizard Pro. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data).
Step 1: Perform a scan.
Hover your mouse over the partition you wish to scan and select "Scan". You can also select a specific folder, or click shortcut icons to scan the Desktop or Recycle Bin:
Wait for EaseUS Data Recovery Wizard Pro to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundreds gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process:
Step 2: Recover data.
Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data. Note also that the trial version of EaseUS Data Recovery Wizard Pro is only capable of scanning drives and listing recoverable files - to restore them, you must purchase a license:
Step 3: Save the scan session (optional).
We recommend that you save the scanning session once you have completed recovery, in case you decide to recover additional files later. Simply click the "Save Scan Session" icon in the upper-right corner of the screen and choose the location for the file to be saved. This will save a lot of time, since you will not need to re-scan the storage drive the next time you wish to restore something. Bear in mind, however, that data removed after the scanning session has finished will not be listed:
Create data backups:
Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.
Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all necessary information on Microsoft's documentation web page.
Data backups: The most reliable backup method is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach. Therefore, you should consider using an application to create data backups locally.
We recommend using the EaseUS Todo Backup application. The "Home" edition of EaseUS Todo Backup is usually more than adequate for regular users, however, the "Business" edition is more suitable for companies and large computer networks. The EaseUS Todo Backup application provides extensive data protection features. You can easily create backups, and encrypt and compress them for enhanced protection and storage saving purposes. It also allows you to set backup schedules, create bootable devices, and restore the system if a crash occurs. You can easily choose where to store the created backup: locally; uploaded to an external drive; FTP; cloud storage, or elsewhere. In summary, EaseUS Todo Backup is an all-in-one tool, which provides all features required to properly backup your data.
Creating a data backup:
The backup process is virtually identical regardless of the item (file, partition, entire system) you wish to backup. Taking the File Backup feature as an example:
Step 1: Choose which item to backup.
Click on the "Menu" icon in the upper-left corner of the screen to reveal the menu and select "File Backup":
Select the files you want to backup. You can also enter a name and description of the backup that will be created:
Step 2: Change the default settings.
The EaseUS Todo Backup application provides a variety of additional options that can be added/modified while creating the backup. For example, you can encrypt data (add a password), select the compression rate (how much the backup should be compressed), performance (how many system resources should be allocated), add an email notification (you receive an email once the process is complete) and so on.
To open the options window, click the "Backup options" button in the lower-left corner of the screen:
Select the settings you want to change and click "Save". You can also reset your changes by clicking "Reset to initial settings":
Step 3: Select the backup destination.
As mentioned above, EaseUS Todo Backup allows you to choose where backups are saved - locally or externally.
Click the "Browse..." button and select the location you want the backup to be saved:
Step 4: Safety measures and process completion.
Depending on the location you have chosen, there are a number of measures you should or should not take. If you are uploading to an internet-connected location (for example, Cloud storage, FTP, etc.), be sure to maintain your internet connection, otherwise you will have to start again. The same applies to external storage devices - do not unplug them until the process is complete.
The progress bar displays estimated time remaining until completion. Large backups (hundreds of gigabytes) can take hours to create (depending on storage device speed, internet connection, etc.). Therefore, the application also allows you to optionally choose what the system should do (shut down, sleep or hibernate) once the process has finished:
The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.