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Ransomware Research
CryptoJacky Ransomware
CryptoJacky is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoJacky
- First Seen
- March 1, 2017
How CryptoJacky Ransomware Works
Targeted Files
Ransomware files in the %Roaming%/r_tool folder
File Encryption Patterns
CryptoJacky modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..aes
Ransom Note and Payment Demands
After encrypting files, CryptoJacky displays ransom notes demanding payment for file recovery:
ransom-instructions.vbs
Ransom message:
notes/ransom-instructions.vbs
Note locations:
Roaming
Technical Indicators
Associated Executable Files
The following executable files are associated with CryptoJacky ransomware:
cryptojacky.exe
cryptoJacky-setup.exe
Windows_10_Firewall_Control.exe
HHD_Software_Hex_Editor_Neo_Ultimate_Edition_6.22.00.exe
Elastio Can Help You
Don't let CryptoJacky ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This CryptoJacky ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like CryptoJacky.
Last updated: July 30, 2025