Ransomware Research
OmniSphere Ransomware
OmniSphere is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- OmniSphere
- First Seen
- October 1, 2019
How OmniSphere Ransomware Works
Targeted Files
https://www.bleepingcomputer.com/forums/t/705232/omnisphere-ransomware-decrypt-my-files-ostxt/?p=4888796 Re-encrypts files unique_decrypt.key in EveryFolder
File Encryption Patterns
OmniSphere modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..omnisphereRansom Note and Payment Demands
After encrypting files, OmniSphere displays ransom notes demanding payment for file recovery:
!DECRYPT_MY_FILES_OS.txtRansom message:
notes/!DECRYPT_MY_FILES_OS.txt
!DECRYPT_OMNISPHERE.txtRansom message:
notes/!DECRYPT_OMNISPHERE.txt
Note locations:
EveryFolderElastio Can Help You
Don't let OmniSphere ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This OmniSphere 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 OmniSphere.
Last updated: July 30, 2025