CyberResearcher Ransomware
CyberResearcher is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2018, this ransomware has been actively targeting systems worldwide.
Quick facts
How CyberResearcher ransomware works
File encryption patterns
CyberResearcher modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, CyberResearcher displays ransom notes demanding payment for file recovery:
notes/READ_IT.html
Technical indicators
Associated executable files
The following executable files are associated with CyberResearcher ransomware:
- Cyberresearcher.exe
About this analysis
This CyberResearcher 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 CyberResearcher.
Last updated: December 30, 2025
Elastio detects CyberResearcher inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify CyberResearcher 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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