Ransomware Research
BTCWare Ransomware
BTCWare is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BTCWare
- First Seen
- March 1, 2017
How BTCWare Ransomware Works
File Encryption Patterns
BTCWare modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..btcware..theva..onyon..xfile..blocking..master..aleta..cryptowinRansom Note and Payment Demands
After encrypting files, BTCWare displays ransom notes demanding payment for file recovery:
#_HOW_TO_FIX.infRansom message:
notes/#_HOW_TO_FIX.inf
Note locations:
EveryFolder!#_READ_ME_#!.htaRansom message:
notes/!#_READ_ME_#!.hta
Note locations:
EveryFolder#_README_#.infRansom message:
notes/#_README_#.inf
Note locations:
EveryFolder!#_DECRYPT_#!.infRansom message:
notes/!#_DECRYPT_#!.inf
!#_RESTORE_FILES_#!.infRansom message:
notes/!#_RESTORE_FILES_#!.inf
Note locations:
EveryFolder!#_READ_ME_#!.infRansom message:
notes/!#_READ_ME_#!.inf
READ ME.txt#_HOW_TO_FIX_!.htaTechnical Indicators
Associated Executable Files
The following executable files are associated with BTCWare ransomware:
mfskSkfkls.exemfskskfkls.execzsdxxs.exeCRYPTOBYTE_2XX.exebtcwarethevazmsksddfff.exezeifjozej.exe16312515.exe<random>.exeCryptoLocker.scrdropdrop.exe
Elastio Can Help You
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About This Analysis
This BTCWare 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.
Last updated: October 30, 2025
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