Ransomware Research
Fantom Ransomware
Fantom 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
- Fantom
- First Seen
- December 1, 2016
How Fantom Ransomware Works
Targeted Files
https://twitter.com/malwrhunterteam/status/847711180541972484 Encrypts filenames -> magic.mgc -> bWFnaWMubWdj.fantom
File Encryption Patterns
Fantom modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..fantom..locked4..11101010..5444Ransom Note and Payment Demands
After encrypting files, Fantom displays ransom notes demanding payment for file recovery:
/^RESTORE-FILES\.\d+\.hta$/Ransom message:
notes/RESTORE-FILES.12888.hta
Note locations:
EveryFolder/^RESTORE-FILES\.\d+\.txt$/Ransom message:
notes/RESTORE-FILES.11101010.txt
Note locations:
EveryFolderREADME.txtRansom message:
notes/README.txt
Note locations:
DesktopDECRYPT_YOUR_FILES.HTMLRansom message:
notes/DECRYPT_YOUR_FILES.HTML
Note locations:
EveryFolderRansom message:
notes/638470482749087973.jpg
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Fantom ransomware:
Application.exesombrd.exeFantom_ransomware
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About This Analysis
This Fantom 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 Fantom.
Last updated: July 30, 2025