Ransomware Research
CHESS-64 Ransomware
CHESS-64 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2026, this ransomware has been actively targeting systems worldwide.
Quick facts
- Ransomware Family
- CHESS-64
- First Seen
- February 1, 2026
How CHESS-64 ransomware works
File modification behavior
CHESS-64 updates file modification timestamps after encryption.
File encryption patterns
CHESS-64 modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .chess
Technical indicators
Associated executable files
The following executable files are associated with CHESS-64 ransomware:
- Chess_Final.exe
About this analysis
This CHESS-64 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 CHESS-64.
Detection coverage
Elastio detects CHESS-64 inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify CHESS-64 across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.