YYYYBJQOQDU Ransomware
YYYYBJQOQDU is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Unnamed Chinese.
Quick facts
How YYYYBJQOQDU ransomware works
File encryption patterns
YYYYBJQOQDU modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, YYYYBJQOQDU displays ransom notes demanding payment for file recovery:
notes/YOUR FILES ARE ENCRYPTED.TXT
About this analysis
This YYYYBJQOQDU ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like YYYYBJQOQDU.
Last updated: December 30, 2025
Elastio detects YYYYBJQOQDU inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify YYYYBJQOQDU across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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