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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
Targeted Files
Full extension -> .[sql772@aol.com].theva;.[black.mirror@qq.com].aleta https://app.any.run/tasks/04f4cade-e722-44ab-8a02-1ddb9e3c2ad2/ Set dates to 01 January 1970
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
..cryptowin
Ransom Note and Payment Demands
After encrypting files, BTCWare displays ransom notes demanding payment for file recovery:
#_HOW_TO_FIX.inf
Ransom message:
notes/#_HOW_TO_FIX.inf
Note locations:
EveryFolder
!#_READ_ME_#!.hta
Ransom message:
notes/!#_READ_ME_#!.hta
Note locations:
EveryFolder
#_README_#.inf
Ransom message:
notes/#_README_#.inf
Note locations:
EveryFolder
!#_DECRYPT_#!.inf
Ransom message:
notes/!#_DECRYPT_#!.inf
!#_RESTORE_FILES_#!.inf
Ransom message:
notes/!#_RESTORE_FILES_#!.inf
Note locations:
EveryFolder
!#_READ_ME_#!.inf
Ransom message:
notes/!#_READ_ME_#!.inf
READ ME.txt
#_HOW_TO_FIX_!.hta
Technical Indicators
Associated Executable Files
The following executable files are associated with BTCWare ransomware:
mfskSkfkls.exe
mfskskfkls.exe
czsdxxs.exe
CRYPTOBYTE_2XX.exe
btcwaretheva
zmsksddfff.exe
zeifjozej.exe
16312515.exe
<random>.exe
CryptoLocker.scr
dropdrop.exe
Elastio Can Help You
Don't let BTCWare ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
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: July 30, 2025