Ransomware Research
BTCLocker Ransomware
BTCLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2016, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: BTC.
Quick Facts
- Ransomware Family
- BTCLocker
- First Seen
- November 1, 2016
- Known Aliases
- BTC
How BTCLocker Ransomware Works
File Encryption Patterns
BTCLocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..BTCRansom Note and Payment Demands
After encrypting files, BTCLocker displays ransom notes demanding payment for file recovery:
BTC_DECRYPT_FILES.txtRansom message:
notes/BTC_DECRYPT_FILES.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with BTCLocker ransomware:
c8ef.exen1.exe
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About This Analysis
This BTCLocker 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 BTCLocker.
Last updated: October 30, 2025
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