LowLevel04 Ransomware
LowLevel04 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2015, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: OORR.
Quick facts
How LowLevel04 ransomware works
File encryption patterns
LowLevel04 modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, LowLevel04 displays ransom notes demanding payment for file recovery:
notes/help recover files.txt
Technical indicators
Associated executable files
The following executable files are associated with LowLevel04 ransomware:
- date.exe
About this analysis
This LowLevel04 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 LowLevel04.
Last updated: December 30, 2025
Elastio detects LowLevel04 inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify LowLevel04 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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