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:

..ololo

Ransom Note and Payment Demands

After encrypting files, Ololo displays ransom notes demanding payment for file recovery:

fileRETURN_DATA.html

Ransom message:

notes/RETURN_DATA.html

Note locations:

EveryFolder
screenshot

Ransom message:

notes/output.png

Note locations:

Desktop

Elastio Can Help You

Don't let Ololo ransomware take over your data

Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.

Learn MoreRequest a Demo

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

Recent Ransomware

Explore other threats in our database

View all ransomware