THREAT REMOVAL

Remove Crypt38 Ransomware and Restore .crypt38 Files

STF-crypt38-regist-ransomware-russian-ransom-note

A ransomware dubbed Crypt38 was found recently by Fortinet researchers. The name comes from the extension it appends to encrypted files, namely .crypt38. The ransom money it demands as payment is 1000 Rubles or roughly 15 US dollars, with the ransom note written in Russian.

To know how to remove the ransomware and what to do to restore your files, you should read this article to its very end.

Threat Summary

NameCrypt38
TypeRansomware
Short DescriptionThe ransomware uses an AES algorithm and encrypts files appending the extension .crypt38 to them.
SymptomsThe ransomware will lock your files and display a ransom note in Russian. Inside it is written that you have to pay around 15 US dollars for file decryption.
Distribution MethodSpam Emails, Email Attachments, Suspicious Sites
Detection Tool See If Your System Has Been Affected by malware

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User ExperienceJoin Our Forum to Discuss Crypt38.
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.

Crypt38 Ransomware – How Is It Spread?

Crypt38 ransomware is possibly spread with spam emails. Such emails have attached files. The malicious code is hidden inside such attachments most of the time. The interesting thing is that emails like that might infect your computer through the body of the email if it contains malicious code.

Social media services and those for file-sharing might include hidden malware files uploaded by the criminals. To avoid getting infected by malware such as this could be done if you are very careful around what you click, open and download when browsing the Web. Suspicious files and links could be dangerous, particularly if they are of an unknown origin.

Crypt38 Ransomware – Technical Overview

Crypt38 is the name given to ransomware, recently found by Fortinet researchers. The name comes from the extension it creates. After the encryption process is complete, it will display the following email address – regist3030@yandex(.)ru.

The ransomware will create the file lsass.exe, in the following directory:

→%Appdata%\Microsoft\Windows\

After that “Autorun” will be enabled for the malware file with this entry in the Windows Registry:

→HKCU\Software\Microsoft\Windows\CurrentVersion\Run lsass (value)

After encryption, the Crypt38 ransomware creates the ransom note file. The payment instructions will be given there (in Russian). Here is a picture of the file:

STF-crypt38-regist-ransomware-russian-ransom-note

The file’s text is written in Russian, and it states the following:

Ваши данные зашифрованы!
Стоимость расшифровки: 1000 рублей
Код разблокировки: / Расшифровать
Ваш ID: [random numbers] Отправьте его на regist3030@yandex.ru

Не удаляйте и не редактируйте файлы .crypt38 и файлы вируса, иначе восстановить данные не получится!

The demanded ransom price is 1000 Rubles, which is around 15 US dollars. There is a warning, which states not to tamper with encrypted files in any way. The payment instructions are written entirely in Russian, but not only Russian speaking countries may be targeted. Do not pay the ransom is a sound advice here. Paying will support the ransomware creators, but it will not guarantee the restoration of your files.

The Crypt38 ransomware uses an AES algorithm for encryption. File extensions which the ransomware searches to encrypt are these:

STF-crypt38-regist-ransomware-.crypt38-file-encryption

→.svg, .indd, .cpp, .pas, .php, .cs, .py, .java, .class, .fla, .pl, .sh, .jpg, .jpeg, .jps, .bmp, .tiff, .avi, .mov, .mp4, .amr, .aac, .doc, .docx, .xls, .xlsx, .ppt, .pptx, .txt, .pdf, .html, .rtf, .dwg, .cdw, .max, .psd, .3dm, .3ds, .dxf, .ps, .ai, .accdb, .odt, .odp, .odx, .ibooks, .xlp, .db, .dbf, .mdf, .sdf, .mdb, .sql, .rar, .7z, .zip, .vcf, .cer, .csr, .torrent, .otl, .report, .key, .csv, .xml

When the encryption process is complete, every file will have the same extension as an appendix – .crypt38. What makes the encryption process rather slow, however, is that the ransomware manually enumerates drive letters in the following sequence:

C:\, D:\, E:\, Z:\, Y:\, X:\, W:\, V:\, F:\, G:\, H:\, I:\, J:\, K:\, U:\, T:\, S:\, R:\, Q:\, L:\, M:\, N:\, O:\, P:\, A:\, B:\

The ransomware will also exclude locking files from strings containing the following:

  • Windows
  • msocache
  • Program Files (x86)
  • Program Files

Crypt38 ransomware might also delete the Shadow Volume Copies service from the Windows operating system. That is not important, given the fact that there is a way to decrypt your files. Read below to see what researchers have found about the encryption process.

Remove Crypt38 Ransomware and Restore .crypt38 Encrypted Files

If your computer is infected by the Crypt38 ransomware, you should have experience with malware removal. You should remove the ransomware as fast as possible as it could encrypt more files spread deeper in the network you use. The recommended action for you is to remove the ransomware completely and follow the step-by-step instructions guide given down below.

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Berta Bilbao

Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


OFFER

REMOVE IT NOW (PC)
with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy


Windows Mac OS X

How to Remove Crypt38 from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove Crypt38

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall Crypt38 and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by Crypt38 on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Crypt38 there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for Crypt38 with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by Crypt38.

Ransomware infections and Crypt38 aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Windows Mac OS X

Get rid of Crypt38 from Mac OS X.


Step 1: Uninstall Crypt38 and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to Crypt38:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Crypt38. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Crypt38. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove Crypt38 via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as Crypt38. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Click the button below below to download SpyHunter for Mac and scan for Crypt38:


Download

SpyHunter for Mac



Step 3 (Optional): Try to Restore Files Encrypted by Crypt38.

Ransomware infections and Crypt38 aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Crypt38 FAQ

What is Crypt38 ransomware and how does it work?

Crypt38 is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does Crypt38 ransomware infect my computer?

Via several ways.Crypt38 Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of Crypt38 is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .Crypt38 files?

You can't. At this point the .Crypt38 files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .Crypt38 files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by Crypt38 ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".Crypt38" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Crypt38 files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of Crypt38 ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate Crypt38 ransomware and then remove it without causing any additional harm to your important .Crypt38 files.

Also, keep in mind that viruses like Crypt38 ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

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