Ransomware Research
FlatChestWare Ransomware
FlatChestWare 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
- FlatChestWare
- First Seen
- August 1, 2017
How FlatChestWare Ransomware Works
Targeted Files
Requires C&C to send information
File Encryption Patterns
FlatChestWare modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..flatRansom Note and Payment Demands
After encrypting files, FlatChestWare displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
LoginTechnical Indicators
Associated Executable Files
The following executable files are associated with FlatChestWare ransomware:
FlatChestWare.exe
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About This Analysis
This FlatChestWare 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 FlatChestWare.
Last updated: July 30, 2025