Ransomware Research
Youhau Ransomware
Youhau is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Youhau
- First Seen
- March 1, 2023
How Youhau Ransomware Works
File Encryption Patterns
Youhau modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..youhauRansom Note and Payment Demands
After encrypting files, Youhau displays ransom notes demanding payment for file recovery:
Dectryption-guide.txtRansom message:
notes/Dectryption-guide.txt
Note locations:
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About This Analysis
This Youhau 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 Youhau.
Last updated: July 30, 2025