Ransomware Research
BTCWare-Onyon Ransomware
BTCWare-Onyon is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: OnyonLock.
Quick Facts
- Ransomware Family
- BTCWare-Onyon
- First Seen
- May 1, 2017
- Known Aliases
- OnyonLock
How BTCWare-Onyon Ransomware Works
Targeted Files
Set mod.date of encrypted files to 01 January 1970
File Encryption Patterns
BTCWare-Onyon modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..onyonRansom Note and Payment Demands
After encrypting files, BTCWare-Onyon displays ransom notes demanding payment for file recovery:
!#_DECRYPT_#!.infRansom message:
notes/!#_DECRYPT_#!.inf
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with BTCWare-Onyon ransomware:
BTCWare_Ransomware (2)a.exeBTCWare ransomwarelocker.exerudi.exeb.exelocker_br123.exeBTCWare ransomware (2)
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About This Analysis
This BTCWare-Onyon 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 BTCWare-Onyon.
Last updated: July 30, 2025