Threat Database Ransomware CryptoShield Ransomware

CryptoShield Ransomware

By GoldSparrow in Ransomware

Threat Scorecard

Threat Level: 100 % (High)
Infected Computers: 167
First Seen: February 1, 2017
Last Seen: February 1, 2023
OS(es) Affected: Windows

The CryptoShield Ransomware is a variant of a previously known ransomware Trojan known as CryptoMix (or CryptMix). The CryptoShield Ransomware is being distributed using exploit kits currently, specifically EITest and the RIG Exploit Kit. Currently, the CryptoShield Ransomware is being distributed on compromised websites. Con artists will infiltrate these websites and inject corrupted Java scripts that redirect computer users to attack websites that install the CryptoShield Ransomware and other threats on the victim's computer.

A Shield that Works Against You

Since the exploit kits used to distribute the CryptoShield Ransomware leverage known vulnerabilities in the victims' software and operating system, it is essential to ensure that all of your software is up-to-date and all security updates and patches are applied. This is especially true for the Windows operating system, the Adobe software and Java. Once the CryptoShield Ransomware is downloaded onto the victim's computer, it will start encrypting the victim's files using a strong encryption algorithm, communicating with its Command and Control server to relay a unique key and encryption key for the victim's computer. The CryptoShield Ransomware will encrypt all files found on the victim's computer with file extensions matching the list below:


The CryptoShield Ransomware uses the AES 256 encryption to encrypt the victim's files and then encrypts the file name using the ROT 13. The CryptoShield Ransomware identifies the encrypted files by adding the extension '.CryptoShield' to each affected file. While the file names can be decrypted relatively simply, the files themselves are not accessible without the decryption key, which the con artists hold in their possession.

The Ransom Note Displayed by the CryptoShield Ransomware

Wherever the CryptoShield Ransomware encrypts files, it creates ransom notes. These are named '# RESTORING FILES #.HTML' and '# RESTORING FILES #.TXT' and are opened with the victim's text editor and Web browser. Apart from the ransom notes, the CryptoShield Ransomware also will display fake error messages that contain numerous suspicious misspellings and odd syntax errors. These error messages are designed to trick computer users into allowing the CryptoShield Ransomware gain administrator access to the victim's computer. Below is the full text of the CryptoShield Ransomware ransom note:

What happened to you files?
All of your files were encrypted by a strong encryption with RSA-2048 using the CryptoShield 1.0.
More information about the encryption keys using RSA-2048 can be found here:
How did this happen ?
Specially for your PC was generated personal RSA-2048 KEY, both public and private.
ALL your FILES were encrypted with the public key, which has been transferred to your computer via the Internet.
Decrypting of your files is only possible with the help of the private key and decrypt program, which is on our secret server.
What do I do ?
So, there are two ways you can choose: wait for a miracle and get your price doubled, or start send email now for more specific instructions, and restore your data easy way.
If You have really valuable data, you better not waste your time, because there is no other way to get your files, except make a payment.
To receive your private software:
Contact us by email , send us an email your (personal identification) ID number and wait for further instructions.
Our specialist will contact you within 24 hours.
For you to be sure, that we can decrypt your files - you can send us a single encrypted file and we will send you back it in a decrypted form.
This will be your guarantee.
Please do not waste your time! You have 72 hours only! After that The Main Server will double your price!
So right now You have a chance to buy your individual private SoftWare with a low price!'

This is the text of the CryptoShield Ransomware fake error message (note the spelling error of 'momory' instead of 'memory'):

'explorer.exe - Application Error
The instruction at 0xe9c71f6c referenced memory at 0x46c8f91a. The momory could not be read.
Click on Yes in the next windows for restore work explorer.exe.

SpyHunter Detects & Remove CryptoShield Ransomware

File System Details

CryptoShield Ransomware may create the following file(s):
# File Name MD5 Detections
1. conhost.exe dab3bc4a3cde46c6f2069786524a4f3e 20
2. adobe_1233452.exe 00ff5b36cc6b09fabfd371f1f2091522 18
3. winlogon.exe c91bb73753c2ed68c1ee7a8c0ac006ac 14
4. conhost.exe 97e9a421384905492f6675e10fd4d80f 6
5. conhost.exe b4430540f3f8ba43db591332d8b41b50 5
6. conhost.exe 2d9c89f874fd2f341595046ad75efd01 4
7. conhost.exe 4527a86f7e1ad9328f091684618fc17d 4
8. conhost.exe fdde3778c52f5a2d4de67ef8c049f856 4
9. winlogon.exe 2c613d71ba14be086195c9fd58a79fa9 3
10. winlogon.exe 297fa6182b74c19a7a894f0aa7437a01 3
11. conhost.exe e4d7596676b884563d9af2eef3642b1f 3
12. conhost.exe 87ff17a6a8776dc211f8fe25e34a8120 3
13. winlogon.exe 9be2fea8003eef818fe399f537242fce 3
14. winlogon.exe 5390a705d12f0befe460163341991e42 2
15. winlogon.exe 5ccd8fcc98b2e0fdac08ed01a381a66f 2
16. winlogon.exe 83fd59daa3aae7f1fbfcdcb3a25104d8 2
17. adobe_1233452.exe 4e773fbd20d0bdd3fc6505e8ef19f621 2
18. winlogon.exe ab4fb0e72cd3d56967215acfa9712754 1
19. conhost.exe 71c906dad53d2cacc2640b2b4a11f609 1
20. conhost.exe 5f0179ce907ddb4492b7561ec2846c9c 1
21. adobe_1233452.exe b4b6750d1bc64deb1aee0fa23ad56885 1
22. file.exe 2b110975ece5a5478f68aa1e98bed678 1
23. file.exe aa33bdac973488e3cee9e64c3c5b7158 1
24. file.exe e0d52cc8793592184a854fde5afaf152 1

Registry Details

CryptoShield Ransomware may create the following registry entry or registry entries:
File name without path


CryptoShield Ransomware may create the following directory or directories:


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