Ransomware Research
Babuk Ransomware
Babuk is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Babuk
- First Seen
- December 1, 2020
How Babuk Ransomware Works
File Encryption Patterns
Babuk modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..__NIST_K571__..babyk..doydo..encrypted..Rook..blastoise..cyber..kings..ljubi..democ..AstraLocker..zazas..crypt..Astra..babuk2..piton..deltaRansom Note and Payment Demands
After encrypting files, Babuk displays ransom notes demanding payment for file recovery:
How To Restore Your Files.txtRansom message:
notes/How To Restore Your Files.txt
Note locations:
EveryFolderHelp Restore Your Files.txtRansom message:
notes/Help Restore Your Files.txt
Note locations:
EveryFolderDECR.TXTNote locations:
EveryFolderHowToRestoreYourFiles.txtNote locations:
EveryFolderRestore Your Files.txtNote locations:
EveryFolderRestore Files.txtNote locations:
EveryFolderRestoreFiles.txtNote locations:
EveryFolderRecover_Your_Files.htmlNote locations:
EveryFolderHow_To_Restore_Your_Files.txtNote locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Babuk ransomware:
serco.execrypto.exer_server.exeservspool.exekings.exeStage1.exeRS_Doydo.exeorion.exeupdate.exe
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About This Analysis
This Babuk 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 Babuk.
Last updated: July 30, 2025