Ransomware Research
BrainCrypt Ransomware
BrainCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BrainCrypt
- First Seen
- December 1, 2016
How BrainCrypt Ransomware Works
Targeted Files
Written in GO Requires C&C (can be emulated response (RSA-1024 PEM)) Full extension -> .[braincrypt@india.com].braincrypt
File Encryption Patterns
BrainCrypt modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..braincryptRansom Note and Payment Demands
After encrypting files, BrainCrypt displays ransom notes demanding payment for file recovery:
!!! HOW TO DECRYPT FILES !!!.txtRansom message:
notes/!!! HOW TO DECRYPT FILES !!!.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with BrainCrypt ransomware:
rlsys.exe
Recovery and Decryption Tools
Good news! Decryption tools are available for BrainCrypt ransomware:
0
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About This Analysis
This BrainCrypt 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 BrainCrypt.
Last updated: July 30, 2025