Ransomware Research
Udaigen Ransomware
Udaigen is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Udaigen
- First Seen
- June 1, 2023
How Udaigen Ransomware Works
Targeted Files
Encrypts file on the Desktop only
File Encryption Patterns
Udaigen modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..jcryptRansom Note and Payment Demands
After encrypting files, Udaigen displays ransom notes demanding payment for file recovery:
___RECOVER__FILES__.jcrypt.txtRansom message:
notes/___RECOVER__FILES__.jcrypt.txt
Note locations:
DesktopRansom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with Udaigen ransomware:
WindowsFormsApp1.exe
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About This Analysis
This Udaigen 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 Udaigen.
Last updated: July 30, 2025