Ransomware Research
BTCWare-Nuclear Ransomware
BTCWare-Nuclear is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BTCWare-Nuclear
- First Seen
- August 1, 2017
How BTCWare-Nuclear Ransomware Works
Targeted Files
Full extension -> .[assistance@firemail.cc].nuclear;.[varginfo@tuta.io].nuclear
File Encryption Patterns
BTCWare-Nuclear modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..nuclearRansom Note and Payment Demands
After encrypting files, BTCWare-Nuclear displays ransom notes demanding payment for file recovery:
HELP.htaRansom message:
notes/HELP.hta
Note locations:
RoamingTechnical Indicators
Associated Executable Files
The following executable files are associated with BTCWare-Nuclear ransomware:
payload.exe1.exeUnderkeeper2Underkeeper2.exebtcware2.exe
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About This Analysis
This BTCWare-Nuclear 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-Nuclear.
Last updated: July 30, 2025