Ransomware Research
YobaCrypt Ransomware
YobaCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Ferrlock.
Quick Facts
- Ransomware Family
- YobaCrypt
- First Seen
- August 1, 2019
- Known Aliases
- Ferrlock
How YobaCrypt Ransomware Works
Targeted Files
Full extension -> .[mr.yoba@aol.com].yoba
File Encryption Patterns
YobaCrypt modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..yobaRansom Note and Payment Demands
After encrypting files, YobaCrypt displays ransom notes demanding payment for file recovery:
!=How_recovery_files=!.txtRansom message:
notes/!=How_recovery_files=!.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with YobaCrypt ransomware:
sysutilssysutil.exenewjunior.exe
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About This Analysis
This YobaCrypt 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 YobaCrypt.
Last updated: July 30, 2025