Ransomware Research
Osno Ransomware
Osno is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Babax-Osno.
Quick Facts
- Ransomware Family
- Osno
- First Seen
- October 1, 2020
- Known Aliases
- Babax-Osno
How Osno Ransomware Works
File Encryption Patterns
Osno modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..osnoedRansom Note and Payment Demands
After encrypting files, Osno displays ransom notes demanding payment for file recovery:
RecInstruct.osnonedRansom message:
notes/RecInstruct.osnoned
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Osno ransomware:
CardGame.exeosno-crypted.exeChrome updaters.exeFallGuysStats.exechrome updaters.exeOsno.exe610689Osno_Builder_v2.1.5.rar
Elastio Can Help You
Don't let Osno ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Osno 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 Osno.
Last updated: October 30, 2025
Recent Ransomware
Explore other threats in our database