Ransomware Research
FAST Ransomware
FAST is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- FAST
- First Seen
- May 1, 2023
How FAST Ransomware Works
Targeted Files
Full extension -> .EMAIL=[fastdec@tutanota.com]ID=[A883F7AA2ED1B445].FAST
File Encryption Patterns
FAST modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..FASTRansom Note and Payment Demands
After encrypting files, FAST displays ransom notes demanding payment for file recovery:
#FILEENCRYPTED.txtRansom message:
notes/#FILEENCRYPTED.txt
Note locations:
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About This Analysis
This FAST 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 FAST.
Last updated: July 30, 2025