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:
..aesRansom Note and Payment Demands
After encrypting files, CryptoJacky displays ransom notes demanding payment for file recovery:
ransom-instructions.vbsRansom message:
notes/ransom-instructions.vbs
Note locations:
RoamingTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoJacky ransomware:
cryptojacky.execryptoJacky-setup.exeWindows_10_Firewall_Control.exeHHD_Software_Hex_Editor_Neo_Ultimate_Edition_6.22.00.exe
Elastio Can Help You
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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