Ransomware Research

Epsilon Red Ransomware

Epsilon Red is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: EpsilonRed PowerShellScript, EpsilonRed PSS-Ransomware.

Quick Facts

Ransomware Family
Epsilon Red
First Seen
March 1, 2021
Known Aliases
EpsilonRed PowerShellScriptEpsilonRed PSS-Ransomware

How Epsilon Red Ransomware Works

Targeted Files

iocs -> https://github.com/sophoslabs/IoCs/blob/master/Ransomware-EpsilonRed.csv Encrypts first ~90kb

File Encryption Patterns

Epsilon Red modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..epsilonred

Ransom Note and Payment Demands

After encrypting files, Epsilon Red displays ransom notes demanding payment for file recovery:

fileHOW_TO_RECOVER.EpsilonRed.txt

Ransom message:

notes/HOW_TO_RECOVER.EpsilonRed.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Epsilon Red ransomware:

  • 1.ps1
  • 2.ps1
  • 4.ps1
  • 5.ps1
  • 6.ps1
  • 7.ps1
  • 8.ps1
  • 9.ps1
  • 10.ps1
  • 11.ps1
  • 12.ps1
  • C.ps1
  • S.ps1
  • P.exe
  • rutserv.exe
  • sJbJxCq
  • dJhTeZjF
  • r_install.exe
  • RED.exe

Elastio Can Help You

Don't let Epsilon Red ransomware take over your data

Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.

Learn MoreRequest a Demo

About This Analysis

This Epsilon Red ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Epsilon Red.

Last updated: July 30, 2025

Recent Ransomware

Explore other threats in our database

View all ransomware