Epsilon Ransomware
Epsilon is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: EpsilonCrypt, Crimson.
Quick facts
How Epsilon ransomware works
File encryption patterns
Epsilon modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, Epsilon displays ransom notes demanding payment for file recovery:
notes/READ_ME.hta
Technical indicators
Associated executable files
The following executable files are associated with Epsilon ransomware:
- B221.exe
- rwmt5qfy.exe
- hp14m30p.exe
- G-654.exe
- G-654.bin
- G-659.exe
- ENVY-6542B-54.exe
- ENVY-6542B-54.bin
About this analysis
This Epsilon 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 Epsilon.
Last updated: December 30, 2025
Elastio detects Epsilon inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Epsilon 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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