Ransomware Research
Ololo Ransomware
Ololo is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2025, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Ololo
- First Seen
- June 1, 2025
How Ololo Ransomware Works
File Encryption Patterns
Ololo modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..ololoRansom Note and Payment Demands
After encrypting files, Ololo displays ransom notes demanding payment for file recovery:
RETURN_DATA.htmlRansom message:
notes/RETURN_DATA.html
Note locations:
EveryFolderRansom message:
notes/output.png
Note locations:
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About This Analysis
This Ololo 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 Ololo.
Last updated: July 30, 2025