Ransomware Research
Cuba Ransomware
Cuba is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Cuba
- First Seen
- January 1, 2020
How Cuba Ransomware Works
Targeted Files
Encrypts first 1Mb
File Encryption Patterns
Cuba modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..cubaRansom Note and Payment Demands
After encrypting files, Cuba displays ransom notes demanding payment for file recovery:
!!! ALL YOUR FILES ARE ENCRYPTED !!!.TXTRansom message:
notes/!!! ALL YOUR FILES ARE ENCRYPTED !!!.TXT
!!FAQ for Decryption!!.txtRansom message:
notes/!!FAQ for Decryption!!.txt
Note locations:
EveryFolder!! READ ME !!.txtRansom message:
notes/!! READ ME !!.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Cuba ransomware:
listdroplistdrop.exeITCGroup.exe438419.exeCC.exekalt.exetest.execuba.exe483560.execuba fidel Ransomware.exe1.exe
Elastio Can Help You
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About This Analysis
This Cuba 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 Cuba.
Last updated: July 30, 2025