Ransomware Research
MoonCryptor Ransomware
MoonCryptor 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
- MoonCryptor
- First Seen
- August 1, 2017
How MoonCryptor Ransomware Works
Targeted Files
Encrypts filenames -> Biblio.mdb -> FE69CC44 °¤î°]ô€L¤.fmoon
File Encryption Patterns
MoonCryptor modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..fmoonRansom Note and Payment Demands
After encrypting files, MoonCryptor displays ransom notes demanding payment for file recovery:
_readmyransom.txtRansom message:
notes/_readmyransom.txt
Note locations:
EveryFolderRansom message:
notes/note.txt
Note locations:
LoginTechnical Indicators
Associated Executable Files
The following executable files are associated with MoonCryptor ransomware:
MoonCryptor.exe
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About This Analysis
This MoonCryptor 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 MoonCryptor.
Last updated: July 30, 2025