Ransomware Research
ONI Ransomware
ONI is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2018, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- ONI
- First Seen
- August 1, 2018
How ONI Ransomware Works
Targeted Files
Biblio.mdb -> 4269626C696F2E6D6462.ONI Encrypts first 152000 bytes
File Encryption Patterns
ONI modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..ONIRansom Note and Payment Demands
After encrypting files, ONI displays ransom notes demanding payment for file recovery:
RESTORE_ONI_FILES.txtRansom message:
notes/RESTORE_ONI_FILES.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with ONI ransomware:
oni.exe
Recovery and Decryption Tools
Good news! Decryption tools are available for ONI ransomware:
0
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About This Analysis
This ONI 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 ONI.
Last updated: July 30, 2025