Ransomware Research
Upsilon Ransomware
Upsilon is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Upsilon
- First Seen
- January 1, 2023
How Upsilon Ransomware Works
Targeted Files
Invalid BTC address in the note -> mpf7VMJEcqhAFEGKUkV2734535sRBxzbiN
File Encryption Patterns
Upsilon modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..upsil0nRansom Note and Payment Demands
After encrypting files, Upsilon displays ransom notes demanding payment for file recovery:
Upsilon.txtRansom message:
notes/Upsilon.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Upsilon ransomware:
Upsilon.exe
Elastio Can Help You
Don't let Upsilon ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Upsilon 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 Upsilon.
Last updated: July 30, 2025