Ransomware Research
BTCWare-Wyvern Ransomware
BTCWare-Wyvern is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BTCWare-Wyvern
- First Seen
- September 1, 2017
How BTCWare-Wyvern Ransomware Works
Targeted Files
Full extension -> .[fuck4u@cock.li]-id-<id>.wyvern
File Encryption Patterns
BTCWare-Wyvern modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..wyvernRansom Note and Payment Demands
After encrypting files, BTCWare-Wyvern displays ransom notes demanding payment for file recovery:
HELP.htaRansom message:
notes/HELP.hta
Note locations:
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About This Analysis
This BTCWare-Wyvern 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-Wyvern.
Last updated: July 30, 2025