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

File Encryption Patterns

BTCWare-Wyvern modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..wyvern

Ransom Note and Payment Demands

After encrypting files, BTCWare-Wyvern displays ransom notes demanding payment for file recovery:

fileHELP.hta

Ransom message:

notes/HELP.hta

Note locations:

Roaming

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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: October 30, 2025

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