How to remove JohnyCryptor ransomware virus

JohnyCryptor is a dangerous virus that uses file encryption to blackmail users to pay ransom for decryptor

JohnyCryptor is ransomware^[1] that first appeared in February 2016 and is a part of CrySiS family. Just as many other similar viruses, the goal of this cyber threat is to extort money out of users. To do that, hackers inject the PC with malicious code which encrypts all personal data using AES-256^[2] encryption algorithm, which modifies names of files in the following way: [victims ID].johnycryptor@aol.com.tbl and [victims ID].johnycryptor@hackermail.com.xtbl. Users are then informed about the situation via the text file How to decrypt your files.txt which is dropped into every folder that contains locked files.

In addition to the text file, the desktop wallpaper is changed and displays a member of Anonymous group^[3] – international hacktivists, that is known for cyber attacks on governments, agencies, corporations and similar. The message displayed in the text file prevails on the desktop too. Users are prompted to contact cybercrooks via Johnycryptor@aol.com or Johnycryptor@india.com. 

Users should be aware that crypto-virus often enters computers through malicious spam emails. The virus is downloaded to the computer as a regular looking document, but when the victim opens it, the virus is activated and starts ravaging through the system. Therefore, it is crucial to behave cautiously around the Internet and use sophisticated antivirus software, such as FortectIntego, for extra protection. If you are already infected with the virus, this software will also help you remove JohnyCryptor from your computer safely and effectively.

As soon as ransomware infiltrates the computer, it starts scanning it for different types of files, including pictures, videos, Office documents, etc. Once the required files are detected, the JohnyCryptor virus encrypts them with a public key, which uses a very complex, military-grade cipher. The data cannot be unlocked using the same key. A private key is needed for this purpose.

However, the cybercriminals are not planning to give it away that easily. They demand a 0.5-1.5 Bitcoin ransom for the key and threaten that all the files will be destroyed in seven days if the payment is not made. All of these demands are clearly stated in the ransom note:

Attention!

Your computer has been encrypted by cryptographically strong algorithm. All your files are now encrypted. You have only one way to get them back safely – using original decryption tool. Using another tools could corrupt your files, use it on your own risk. To get original decryptor contact us with email JohnyCryptor@aol.com.

It is in your interest to respond as soon as possible to ensure the restoration of your files, because we won't keep your decryption keys at our servers more than one week in interest of our security.

P.S. only in case you do not receive a response from the first email address within 48 hours, please use this alternative email address JohnyCryptor@india.com

However, these extortionists are wrong, as the safest way to get data back is by restoring it from a remote backup, such as Dropbox, OneDrive or remote device, such as external HDD (note that the drive should not be connected to the PC during ransomware attack, as all files would be encrypted as well). That is why security experts^[4] recommend to always backup your files if they are essential to you, as there are plenty of ransomware viruses that can destroy your data.

Another reason not to pay JohnyCryptor creators is that you could end up without your files, as well as without your money. Cybercrooks are known to ignore victims after payment, as well as to send them malicious files that contain malware. In another scenario, they will see that you are willing to pay; hence the recurring attacks are likely. 

In August 2016, another variant of JohnyCryptor came out. Security researchers did not observe any significant differences, apart from a new wallpaper and slightly different message.

To conclude, you should not delay JohnyCryptor removal. Only after that, you can proceed with file recovery. We explain how to achieve that in detailed instructions below.

Ways to protect yourself from malicious threats online

Unfortunately, there are no methods that can guarantee the safety of your computer 100%. Nevertheless, you can use a combination of different techniques such as equipping your computer with a sophisticated firewall and reliable antivirus utility, regularly updating your system for security patches should at least provide your machine with more immunity against ransomware infection. 

However, the most prominent ransomware distribution method is via spam emails, and it is entirely up to you to validate the legitimacy of messages in your inbox. Thus, do not open every email, especially ones with attachment, as ransomware payload is hiding in it. Note that some fake emails might be written exceptionally well and it might be hard to differentiate genuine email from a malicious one.

Fortunately, email providers have in-built scanners which flag suspicious emails. Thus, do not ignore these warnings and ultimately be extremely attentive while making sure that the email is coming from where it seems to be.

Removing JohnyCryptor from the infected device

JohnyCryptor removal may cause a lot of concern to the inexperienced users, but, in reality, it is much simpler than it looks. First, you have to obtain a reliable antivirus software, then disconnect your computer from the network. Finally, run a full scan of your system.

In case the virus tries interfering with security software, use instructions provided at the end of this article to enter Safe Mode with Networking and perform a scan from there. Remember that only when you fully remove JohnyCryptor from your computer can you start recovering your files from backups. If you do not have such, you can try retrieving your data using third-party tools – we provide full instructions below.